SQ24T15010-NEB0 [BEL]
DC-DC Regulated Power Supply Module, 1 Output, 15W, Hybrid, EIGHTH BRICK PACKAGE-8;
| 型号： | SQ24T15010-NEB0 |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 15W, Hybrid, EIGHTH BRICK PACKAGE-8 输入元件 输出元件 |
| 文件： | 总70页 (文件大小：652K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
The SemiQ™ Family of dc-dc converters from provides a
high efficiency single output in a size that is only 60% of
industry-standard quarter-bricks, while preserving the
same pinout and functionality.
In high temperature environments, for output voltages
ranging from 3.3 V to 1.0 V, the thermal performance of
SemiQ™ converters exceeds that of most competitors' 20-
30 A quarter-bricks. This is accomplished through the use
of patent pending circuit, packaging and processing
techniques to achieve ultra-high efficiency, excellent
thermal management and a very low body profile.
SQ24T and SQ24S Converters
Low body profile and the preclusion of heat sinks minimize
airflow shadowing, thus enhancing cooling for downstream
devices. The use of 100% automation for assembly,
coupled with advanced electric and thermal design, results
in a product with extremely high reliability.
Features
RoHS lead-free solder and lead-solder-exempted
products are available
Operating from an 18-36 V input, the SQ24 Series
converters of the SemiQ™ Family provide any standard
output voltage from 12 V down to 1.0 V. Outputs can be
trimmed from –20% to +10% of the nominal output voltage
(±10% for output voltages 1.2 V and 1.0 V), thus providing
outstanding design flexibility.
Delivers up to 15 A (50 W)
Available in through-hole and SM packages
Low weight: 0.53 oz (15 g)
Low profile: 0.274” (6.96 mm)
Extremely small footprint: 0.896” x 2.30” (2.06 in2)
Outputs available in 12.0, 8.0, 6.0, 5.0, 3.3, 2.5, 2.0,
1.8, 1.5, 1.2 and 1.0 V
With a standard pinout and trim equations, the SQ24
Series converters are perfect drop-in replacements for
existing quarter brick designs. Inclusion of this converter in
new designs can result in significant board space and cost
savings. The device is also available in a surface mount
package.
High efficiency – no heat sink required
On-board input differential LC-filter
Extremely low output and input ripple
Start-up into pre-biased output
No minimum load required
Meets Basic Insulation requirements of EN60950
Fixed-frequency operation
Fully protected
Remote output sense
Output voltage trim range: +10%/−20% (except 1.2 V
and 1.0 V outputs with trim range ±10%) with industry-
standard trim equations
In both cases the designer can expect reliability
improvement over other available converters because of
the SQ24 Series’ optimized thermal efficiency.
Applications
High reliability: MTBF of 3.4 million hours, calculated
per Telcordia TR-332, Method I Case 1
Positive or negative logic ON/OFF option
UL 60950-1/CSA 22.2 No. 60950-1-07 Second
Edition, IEC 60950-1: 2005, and EN 60950-1:2006
Meets conducted emissions requirements of FCC
Class B and EN 55022 Class B with external filter
All materials meet UL94, V-0 flammability rating
Telecommunications
Data communications
Wireless
Servers
MCD10159 Rev. 1.2, 20-Apr-12
Page 1 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications (common to all versions)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, All output voltages, unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX
UNITS
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Operating Ambient Temperature
Storage Temperature
Continuous
0
-40
-55
40
85
125
VDC
°C
°C
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under Voltage Lockout
Turn-on Threshold
18
24
36
VDC
Non-latching
16
15
17
16
17.5
16.5
VDC
VDC
Turn-off Threshold
ISOLATION CHARACTERISTICS
I/O Isolation
Isolation Capacitance:
2000
VDC
pF
pF
1.0 - 3.3 V
5.0 - 6.0 V
8.0 V, 12 V
160
260
230
pF
Isolation Resistance
10
MΩ
FEATURE CHARACTERISTICS
Switching Frequency
415
kHz
%
%
Output Voltage Trim Range1
Industry-std. equations (1.5 - 12 V)
Industry-std. equations (1.0 - 1.2 V)
Percent of VOUT(NOM)
-20
-10
+10
+10
+10
140
140
Remote Sense Compensation1
Output Over-Voltage Protection
%
Non-latching (1.5 - 12 V)
Non-latching (1.0 - 1.2 V)
Applies to all protection features
117
124
125
132
100
4
%
%
ms
ms
Auto-Restart Period
Turn-On Time
ON/OFF Control (Positive Logic)
Converter Off
-20
2.4
0.8
20
VDC
VDC
Converter On
ON/OFF Control (Negative Logic)
Converter Off
2.4
-20
20
0.8
VDC
VDC
Converter On
Additional Notes:
1. Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total output voltage trim from all sources
should not exceed 10% of VOUT(NOM), in order to insure specified operation of over-voltage protection circuitry. See “Output Voltage Adjust/Trim” for
detailed information.
MCD10159 Rev. 1.2, 20-Apr-12
Page 2 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
in which case it must be capable of sourcing or sinking up to
1mA depending on the signal polarity. See the Start-up
Information section for system timing waveforms associated
with use of the ON/OFF pin.
Operation
Input and Output Impedance
These power converters have been designed to be stable
with no external capacitors when used in low inductance
input and output circuits.
Remote Sense (Pins 5 and 7)
However, in many applications, the inductance associated
with the distribution from the power source to the input of the
converter can affect the stability of the converter. The
addition of a 100 µF electrolytic capacitor with an ESR < 1
across the input helps ensure stability of the converter. In
many applications, the user has to use decoupling
capacitance at the load. The power converter will exhibit
stable operation with external load capacitance up to
1000 µF on 12 V, 2,200 µF on 8.0 V, 10,000 µF on 5.0 V –
6.0 V, and 15,000 µF on 3.3 V – 1.0 V outputs.
The remote sense feature of the converter compensates for
voltage drops occurring between the output pins of the
converter and the load. The SENSE(-) (Pin 5) and SENSE(+)
(Pin 7) pins should be connected at the load or at the point
where regulation is required (see Fig. B).
TM
Rw
Family
Q
Semi
Vout (+)
100
Vin (+)
ON/OFF
Vin (-)
Converter
SENSE (+)
(Top View)
Rload
TRIM
Vin
SENSE (-)
10
ON/OFF (Pin 2)
Vout (-)
Rw
The ON/OFF pin is used to turn the power converter on or
off remotely via a system signal. There are two remote
control options available, positive logic and negative logic
and both are referenced to Vin(-). Typical connections are
shown in Fig. A.
Fig. B: Remote sense circuit configuration.
If remote sensing is not required, the SENSE(-) pin must be
connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin
must be connected to the Vout(+) pin (Pin 8) to ensure the
converter will regulate at the specified output voltage. If
these connections are not made, the converter will deliver an
output voltage that is slightly higher than the specified value.
TM
Family
Q
Semi
Vin (+)
ON/OFF
Vin (-)
Vout (+)
SENSE (+)
TRIM
Converter
(Top View)
Rload
Vin
SENSE (-)
Vout (-)
Because the sense leads carry minimal current, large traces
on the end-user board are not required. However, sense
traces should be located close to a ground plane to minimize
system noise and insure optimum performance. When wiring
discretely, twisted pair wires should be used to connect the
sense lines to the load to reduce susceptibility to noise.
CONTROL
INPUT
Fig. A: Circuit configuration for ON/OFF function.
The positive logic version turns on when the ON/OFF pin is
at logic high and turns off when at logic low. The converter is
on when the ON/OFF pin is left open.
The converter’s output over-voltage protection (OVP) senses
the voltage across Vout(+) and Vout(-), and not across the
sense lines, so the resistance (and resulting voltage drop)
between the output pins of the converter and the load should
be minimized to prevent unwanted triggering of the OVP.
The negative logic version turns on when the pin is at logic
low and turns off when the pin is at logic high. The ON/OFF
pin can be hard wired directly to Vin(-) to enable automatic
power up of the converter without the need of an external
control signal.
When utilizing the remote sense feature, care must be taken
not to exceed the maximum allowable output power
capability of the converter, equal to the product of the
nominal output voltage and the allowable output current for
the given conditions.
ON/OFF pin is internally pulled-up to 5 V through a resistor.
A mechanical switch, open collector transistor, or FET can
be used to drive the input of the ON/OFF pin. The device
must be capable of sinking up to 0.2mA at a low level
voltage of 0.8V. An external voltage source (±20V
maximum) may be connected directly to the ON/OFF input,
When using remote sense, the output voltage at the
converter can be increased by as much as 10% above the
nominal rating in order to maintain the required voltage
across the load. Therefore, the designer must, if necessary,
MCD10159 Rev. 1.2, 20-Apr-12
Page 3 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Fig. C: Configuration for increasing output voltage.
decrease the maximum current (originally obtained from the
derating curves) by the same percentage to ensure the
converter’s actual output power remains at or below the
maximum allowable output power.
To decrease the output voltage (Fig. D), a trim resistor,
T-DECR, should be connected between the TRIM (Pin 6) and
SENSE(-) (Pin 5), with a value of:
R
511
Output Voltage Adjust /TRIM (Pin 6)
RTDECR
10.22
[k]
(1.0 – 12V)
| Δ |
The converter’s output voltage can be adjusted up 10% or
down 20% for Vout ≥ 1.5V, and ±10% for Vout = 1.2V and
1.0 V, relative to the rated output voltage by the addition of
an externally connected resistor. For output voltages 3.3V,
trim up to 10% is guaranteed only at Vin ≥ 20V, and it is
marginal (8% to 10%) at Vin = 18V depending on load
current.
where,
RTDECR Required value of trim-down resistor [k]
and Δ is as defined above.
Note: The above equations for calculation of trim resistor
values match those typically used in conventional industry-
standard quarter bricks and one-eighth bricks.
Converters with output voltage 1.2V and 1.0V have specific
trim schematic and equations, to provide the customers with
the flexibility of second sourcing. For these converters, the
last character of part number is “T”. More information about
trim feature, including corresponding schematic portions, can
be found in Application Note 103.
The TRIM pin should be left open if trimming is not being
used. To minimize noise pickup, a 0.1 µF capacitor is
connected internally between the TRIM and SENSE(-) pins.
To increase the output voltage, refer to Fig. C. A trim
resistor, RT-INCR, should be connected between the TRIM
(Pin 6) and SENSE(+) (Pin 7), with a value of:
TM
Family
Q
Semi
Vin (+)
ON/OFF
Vin (-)
Vout (+)
SENSE (+)
TRIM
Converter
5.11(100 Δ)VONOM 626
R
R
R
TINCR
10.22 [k] (1.5 –12V)
(Top View)
1.225Δ
Rload
Vin
RT-DECR
SENSE (-)
Vout (-)
485
TINCR
TINCR
[k] (1.2V)
Δ
323
2
[k] (1.0V)
Fig. D: Configuration for decreasing output voltage.
Δ
Trimming/sensing beyond 110% of the rated output voltage
is not an acceptable design practice, as this condition could
cause unwanted triggering of the output over-voltage
protection (OVP) circuit. The designer should ensure that the
difference between the voltages across the converter’s
output pins and its sense pins does not exceed 10% of
where,
RTINCR Required value of trim-up resistor k]
VONOM Nominal value of output voltage [V]
(VO-REQ VO-NOM)
Δ
X 100 [%]
VOUT(NOM), or:
VO -NOM
[VOUT() VOUT()][VSENSE() VSENSE()] VO - NOM X10% [V]
VOREQ Desired (trimmed) output voltage [V].
This equation is applicable for any condition of output
sensing and/or output trim.
When trimming up, care must be taken not to exceed the
converter‘s maximum allowable output power. See previous
section for a complete discussion of this requirement.
TM
Family
Q
Semi
Vin (+)
ON/OFF
Vin (-)
Vout (+)
SENSE (+)
TRIM
Converter
(Top View)
R T-INCR
Rload
Vin
SENSE (-)
Vout (-)
MCD10159 Rev. 1.2, 20-Apr-12
Page 4 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
provides the recommended fuse rating for use with this
family of products.
Protection Features
Input Undervoltage Lockout
Output Voltage
Fuse Rating
3.3V
12V - 5.0V, 2.5V
2.0V - 1.0V
8A
6A
4A
Input undervoltage lockout is standard with this converter.
The converter will shut down when the input voltage drops
below a pre-determined voltage.
If one input fuse is used for a group of modules, the
maximum fuse rating should not exceed 15-A (SQ modules
are UL approved with up to a 15-A fuse).
The input voltage must be at least 17.5V for the converter to
turn on. Once the converter has been turned on, it will shut
off when the input voltage drops below 15V. This feature is
beneficial in preventing deep discharging of batteries used in
telecom applications.
Electromagnetic Compatibility (EMC)
EMC requirements must be met at the end-product system
level, as no specific standards dedicated to EMC
characteristics of board mounted component dc-dc
converters exist. However, Power-One tests its converters to
several system level standards, primary of which is the more
stringent EN55022, Information technology equipment -
Radio disturbance characteristics - Limits and methods of
measurement.
Output Overcurrent Protection (OCP)
The converter is protected against overcurrent or short
circuit conditions. Upon sensing an overcurrent condition,
the converter will switch to constant current operation and
thereby begin to reduce output voltage. When the output
voltage drops below 50% of the nominal value of output
voltage, the converter will shut down.
With the addition of a simple external filter (see application
notes), all versions of the SQ24 Series of converters pass
the requirements of Class B conducted emissions per
EN55022 and FCC, and meet at a minimum, Class A
radiated emissions per EN 55022 and Class B per FCC Title
47CFR, Part 15-J. Please contact di/dt Applications
Engineering for details of this testing.
Once the converter has shut down, it will attempt to restart
nominally every 100 ms with a typical 1-2% duty cycle. The
attempted restart will continue indefinitely until the overload
or short circuit conditions are removed or the output voltage
rises above 50% of its nominal value.
Output Overvoltage Protection (OVP)
The converter will shut down if the output voltage across
Vout(+) (Pin 8) and Vout(-) (Pin 4) exceeds the threshold of
the OVP circuitry. The OVP circuitry contains its own
reference, independent of the output voltage regulation loop.
Once the converter has shut down, it will attempt to restart
every 100 ms until the OVP condition is removed.
Characterization
General Information
The converter has been characterized for many operational
aspects, to include thermal derating (maximum load current
as a function of ambient temperature and airflow) for vertical
and horizontal mounting, efficiency, start-up and shutdown
parameters, output ripple and noise, transient response to
load step-change, overload and short circuit.
Overtemperature Protection (OTP)
The converter will shut down under an overtemperature
condition to protect itself from overheating caused by
operation outside the thermal derating curves, or operation
in abnormal conditions such as system fan failure. After the
converter has cooled to a safe operating temperature, it will
automatically restart.
The figures are numbered as Fig. x.y, where x indicates the
different output voltages, and y is associated with a specific
plot (y = 1 for the vertical thermal derating, …). For example,
Fig. x.1 will refer to the vertical thermal derating for all the
output voltages in general.
Safety Requirements
The following pages contain specific plots or waveforms
associated with the converter. Additional comments for
specific data are provided below.
The converters meet North American and International
safety regulatory requirements per UL 60950-1/CSA 22.2
No. 60950-1-07 Second Edition, IEC 60950-1: 2005, and
EN 60950-1:2006.
Basic Insulation is provided between input and output. To
comply with safety agencies requirements, an input line fuse
must be used external to the converter. The table below
MCD10159 Rev. 1.2, 20-Apr-12
Page 5 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Test Conditions
All data presented were taken with the converter soldered to
a test board, specifically a 0.060” thick printed wiring board
(PWB) with four layers. The top and bottom layers were not
metalized. The two inner layers, comprising two-ounce
copper, were used to provide traces for connectivity to the
converter.
Fig. H: Location of the thermocouple for thermal testing.
The lack of metalization on the outer layers as well as the
limited thermal connection ensured that heat transfer from
the converter to the PWB was minimized. This provides a
worst-case but consistent scenario for thermal derating
purposes.
Efficiency
Fig. x.5 shows the efficiency vs. load current plot for ambient
temperature of 25 ºC, airflow rate of 300 LFM (1.5 m/s) with
vertical mounting and input voltages of 18 V, 24 V and 36 V.
Also, a plot of efficiency vs. load current, as a function of
ambient temperature with Vin = 24 V, airflow rate of 200 LFM
(1 m/s) with vertical mounting is shown in Fig. x.6.
All measurements requiring airflow were made in vertical
and horizontal wind tunnel facilities using Infrared (IR)
thermography and thermocouples for thermometry.
Ensuring components on the converter do not exceed their
ratings is important to maintaining high reliability. If one
anticipates operating the converter at or close to the
maximum loads specified in the derating curves, it is prudent
to check actual operating temperatures in the application.
Thermographic imaging is preferable; if this capability is not
available, then thermocouples may be used. Power-One
recommends the use of AWG #40 gauge thermocouples to
ensure measurement accuracy. Careful routing of the
thermocouple leads will further minimize measurement error.
Refer to Figure H for optimum measuring thermocouple
location.
Power Dissipation
Fig. x.7 shows the power dissipation vs. load current plot for
Ta = 25 ºC, airflow rate of 300 LFM (1.5 m/s) with vertical
mounting and input voltages of 18 V, 24 V and 36 V. Also, a
plot of power dissipation vs. load current, as a function of
ambient temperature with Vin = 24 V, airflow rate of 200 LFM
(1 m/s) with vertical mounting is shown in Fig. x.8.
Start-up
Thermal Derating
Output voltage waveforms, during the turn-on transient using
the ON/OFF pin for full rated load currents (resistive load)
are shown without and with external load capacitance in
Fig. x.9 and Fig. x.10, respectively.
Load current vs. ambient temperature and airflow rates are
given in Fig. x.1 for through-hole version. Ambient
temperature was varied between 25 °C and 85 °C, with
airflow rates from 30 to 500 LFM (0.15 to 2.5 m/s), and
vertical and horizontal converter mounting.
Ripple and Noise
For each set of conditions, the maximum load current was
defined as the lowest of:
Fig. x.13 shows the output voltage ripple waveform,
measured at full rated load current with a 10 µF tantalum
and 1 µF ceramic capacitor across the output. Note that all
output voltage waveforms are measured across a 1 F
ceramic capacitor.
(i) The output current at which any FET junction temperature
did not exceed a maximum specified temperature (120 °C)
as indicated by the thermographic image, or
(ii) The nominal rating of the converter (4 A on 12 V, 5.3 A
on 8.0 V, 8 A on 6.0 V, 10 A on 5.0 V, and 15 A on
3.3 – 1.0 V).
The input reflected ripple current waveforms are obtained
using the test setup shown in Fig x.14. The corresponding
waveforms are shown in Fig. x.15 and Fig. x.16.
During normal operation, derating curves with maximum FET
temperature less than or equal to 120 °C should not be
exceeded. Temperature on the PCB at the thermocouple
location shown in Fig. H should not exceed 118 °C in order
to operate inside the derating curves.
MCD10159 Rev. 1.2, 20-Apr-12
Page 6 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
VIN
Start-up Information (using negative ON/OFF)
Scenario #1: Initial Start-up From Bulk Supply
ON/OFF function enabled, converter started via application of VIN.
See Figure E.
ON/OFF
STATE
Time
Comments
OFF
ON
t0
ON/OFF pin is ON; system front end power is toggled
on, VIN to converter begins to rise.
VIN crosses Under-Voltage Lockout protection circuit
threshold; converter enabled.
Converter begins to respond to turn-on command
(converter turn-on delay).
Converter VOUT reaches 100% of nominal value.
t1
t2
t3
VOUT
For this example, the total converter start-up time (t3- t1) is typically
4 ms.
t
t0
t1 t2
t3
Fig. E: Start-up scenario #1
Scenario #2: Initial Start-up Using ON/OFF Pin
With VIN previously powered, converter started via ON/OFF pin.
See Figure F.
VIN
Time
t0
t1
Comments
VINPUT at nominal value.
Arbitrary time when ON/OFF pin is enabled (converter
enabled).
ON/OFF
STATE
OFF
ON
t2
t3
End of converter turn-on delay.
Converter VOUT reaches 100% of nominal value.
For this example, the total converter start-up time (t3- t1) is typically
4 ms.
VOUT
Scenario #3: Turn-off and Restart Using ON/OFF Pin
With VIN previously powered, converter is disabled and then
enabled via ON/OFF pin. See Figure G.
t
t0
t1 t2
t3
Time
t0
t1
Comments
Fig. F: Start-up scenario #2.
VIN and VOUT are at nominal values; ON/OFF pin ON.
ON/OFF pin arbitrarily disabled; converter output falls
to zero; turn-on inhibit delay period (100 ms typical) is
initiated, and ON/OFF pin action is internally inhibited.
ON/OFF pin is externally re-enabled.
VIN
t2
If (t2- t1) ≤ 100 ms, external action of ON/OFF pin
is locked out by start-up inhibit timer.
If (t2- t1) > 100 ms, ON/OFF pin action is internally
enabled.
Turn-on inhibit delay period ends. If ON/OFF pin is ON,
converter begins turn-on; if off, converter awaits
ON/OFF pin ON signal; see Figure F.
100 ms
ON/OFF
STATE
OFF
ON
t3
t4
t5
End of converter turn-on delay.
Converter VOUT reaches 100% of nominal value.
VOUT
For the condition, (t2- t1) ≤ 100 ms, the total converter start-up
time (t5- t2) is typically 104 ms. For (t2- t1) > 100 ms, start-up will
be typically 4 ms after release of ON/OFF pin.
t
t0
t1
t2
t3 t4
t5
Fig. G: Start-up scenario #3.
MCD10159 Rev. 1.2, 20-Apr-12
Page 7 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S04120 (12 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=12 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
4 ADC, 12 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25MHz bandwidth
3.1
ADC
mADC
mADC
mAPK-PK
dB
3
100
6
120Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
11.880
12.000
12.120
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±4
±4
±10
±10
12.180
120
1000
4
5.5
10
1
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
11.820
0
90
Non-latching
Non-latching. Short=10mꢀ.
Non-latching
5
7.5
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
1 μF ceramic
150
200
20
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
87
87
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 8 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S04120 (12 Volts Out)
5
4
5
4
3
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
2
1
1
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 12V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T04120 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
Fig. 12V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T04120 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
5
4
5
4
3
3
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
2
1
1
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 12V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S04120 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 12V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S04120 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 9 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S04120 (12 Volts Out)
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.95
0.90
0.85
0.80
36 V
24 V
18 V
70 C
55 C
40 C
0.75
0.70
0.65
0
1
2
3
4
5
0
1
2
3
4
5
Load Current [Adc]
Load Current [Adc]
Fig. 12V.5: Efficiency vs. load current and input voltage for
SQ24T/S04120 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
Fig. 12V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S04120 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
10.00
8.00
6.00
4.00
10.00
8.00
6.00
4.00
36 V
24 V
70 C
55 C
40 C
18 V
2.00
2.00
0.00
0.00
0
1
2
3
4
5
0
1
2
3
4
5
Load Current [Adc]
Load Current [Adc]
Fig. 12V.7: Power dissipation vs. load current and input
voltage for SQ24T/S04120 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
Fig. 12V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S04120 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
MCD10159 Rev. 1.2, 20-Apr-12
Page 10 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S04120 (12 Volts Out)
Fig. 12V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (5 V/div.). Time scale: 1 ms/div.
Fig. 12V.10: Turn-on transient at full rated load current
(resistive) plus 1,000F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (5 V/div.). Time scale: 2 ms/div.
Fig. 12V.11: Output voltage response to load current step-
change (1A – 2A – 1A) at Vin = 24V. Top trace: output voltage
(200 mV/div.). Bottom trace: load current (1 A/div.). Current
slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.5 ms/div.
Fig. 12V.12: Output voltage response to load current step-
change (1A – 2A – 1A) at Vin = 24V. Top trace: output voltage
(200 mV/div.). Bottom trace: load current (1 A/div.). Current
slew rate: 5 A/s. Co = 1 F ceramic. Time scale: 0.5 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 11 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S04120 (12 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 12V.13: Output voltage ripple (50 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 12V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 12V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 12V.14 for test setup. Time scale: 1 s/div.
Fig. 12V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10H at the source at full rated load current
and Vin = 24V. Refer to Fig. 12V.14 for test setup. Time scale:
1s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 12 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S04120 (12 Volts Out)
15
10
5
0
6
0
1
2
3
4
5
Iout [Adc]
Fig. 12V.18: Load current (top trace, 5 A/div., 20 ms/div.) into
a 10 m short circuit during restart, at Vin = 24V. Bottom trace
(5 A/div., 1 ms/div.) is an expansion of the on-time portion of
the top trace.
Fig. 12V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
MCD10159 Rev. 1.2, 20-Apr-12
Page 13 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S05080 (8.0 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=8.0 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
5.3 ADC, 8.0 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
2.8
ADC
mADC
mADC
mAPK-PK
dB
2.6
68
6
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
7.920
8.000
8.080
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±4
±4
±10
±10
8.120
100
2200
5.3
6.75
12
1
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
7.880
0
70
Non-latching
Non-latching. Short=10mꢀ.
Non-latching
6.25
10
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 94 μF tant. + 1 μF ceramic
160
160
400
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
85.5
87
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
6
5
4
3
2
1
0
0.95
0.90
0.85
0.80
0.75
0.70
0.65
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
36 V
24 V
18 V
30 LFM (0.15 m/s)
20
30
40
50
60
70
80
90
0
1
2
3
4
5
6
Ambient Temperature [°C]
Load Current [Adc]
Fig. 8.0V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T05080 converter with D height pins
mounted vertically with Vin = 24 V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
Fig. 8.0V.2: Efficiency vs. load current and input voltage for
SQ24T/S05080 converter mounted vertically with air flowing from
pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 14 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S08060 (6.0 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=6.0 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
8 ADC, 6.0 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
3.1
ADC
mADC
mADC
mAPK-PK
dB
2.6
88
6
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
5.940
6.000
6.060
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±2
±2
±5
±5
6.090
60
10,000
8
11.5
25
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
5.910
0
45
Non-latching
Non-latching. Short=10mꢀ.
Non-latching
10
15
2.5
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 450 μF tant. + 1 μF ceramic
100
80
200
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
89
89
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 15 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S08060 (6.0 Volts Out)
10
8
10
8
6
6
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
4
4
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
300 LFM (1.5 m/s)
200 LFM 1.0 s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
100 LFM (0.5 )
30 LFM (015 m/s)
2
2
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 6.0V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T08060 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
Fig. 6.0V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T08060 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
10
8
10
8
6
6
500 LFM (2.5 m/s)
400 LFM (2.0
500 LFM (2.5 m/s)
400 LFM (2.0
4
4
300 LFM (1.5 m
200 LFM (1.0 m/s
300 LFM (1.5 m
200 LFM (.0 m/s
100 M m/s)
30 LFM (0.15 m/s)
100 M m/s)
30 LFM (0.15 m/s)
2
2
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 6.0V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S08060 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 6.0V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S08060 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 16 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S08060 (6.0 Volts Out)
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
0.70
0.65
70 C
0.75
36 V
55 C
24 V
40 C
18 V
0.70
0.65
0
2
4
6
8
10
0
2
4
6
8
10
Load Current [Adc]
Load Current [Adc]
Fig. 6.0V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S08060 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 6.0V.5: Efficiency vs. load current and input voltage for
SQ24T/S08060 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
10.00
8.00
6.00
4.00
10.00
8.00
6.00
4.00
70 C
55 C
40 C
72 V
48 V
36 V
2.00
2.00
0.00
0.00
0
2
4
6
8
10
0
2
4
6
8
10
Load Current [Adc]
Load Current [Adc]
Fig. 6.0V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S08060 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 6.0V.7: Power dissipation vs. load current and ambient
temperature for SQ24T/S08060 converter mounted vertically
with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5
m/s) and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 17 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S08060 (6.0 Volts Out)
Fig. 6.0V.10: Turn-on transient at full rated load current
Fig. 6.0V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (2 V/div.). Time scale: 1 ms/div.
(resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (2 V/div.). Time scale: 2 ms/div.
Fig. 6.0V.12: Output voltage response to load current step-
change (2A – 4A – 2A) at Vin = 24V. Top trace: output voltage
(100mV/div.). Bottom trace: load current (2A/div.). Current slew
rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale:
0.2 ms/div.
Fig. 6.0V.11: Output voltage response to load current step-
change (2A – 4A – 2A) at Vin = 24V. Top trace: output voltage
(100mV/div.). Bottom trace: load current (2A/div.). Current slew
rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 18 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S08060 (6.0 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 6.0V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 6.0V.13: Output voltage ripple (50 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 6.0V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 6.0V.14 for test setup. Time scale: 1 s/div.
Fig. 6.0V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 6.0V.14 for test setup. Time scale:
1s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 19 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S08060 (6.0 Volts Out)
8
6
4
2
0
12
0
3
6
9
Iout [Adc]
Fig. 6.0V.18: Load current (top trace, 20 A/div., 20 ms/div.)
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (20 A/div., 2 ms/div.) is an expansion of the on-time
portion of the top trace.
Fig. 6.0V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
MCD10159 Rev. 1.2, 20-Apr-12
Page 20 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S10050 (5.0 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=5.0 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX
UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
10 ADC, 5.0 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
3.3
ADC
mADC
mADC
mAPK-PK
dB
3
93
6
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
4.950
5.000
5.050
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±2
±2
±5
±5
5.075
80
10,000
10
14
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
4.925
0
45
Non-latching
Non-latching. Short=10mꢀ.
Non-latching
12.5
20
30
3
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 450 μF tant. + 1 μF ceramic
140
90
200
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
86
87
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 21 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S10050 (5.0 Volts Out)
12
10
8
12
10
8
6
6
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
4
2
0
4
2
0
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 5.0V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T10050 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
Fig. 5.0V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T10050 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
12
10
8
12
10
8
6
6
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
4
2
0
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
4
2
0
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 5.0V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S10050 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 5.0V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S10050 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 22 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S10050 (5.0 Volts Out)
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
0.70
0.65
70 C
55 C
40 C
0.75
36 V
24 V
18 V
0.70
0.65
0
2
4
6
8
10
12
0
2
4
6
8
10
12
Load Current [Adc]
Load Current [Adc]
Fig. 5.0V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S10050 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 5.0V.5: Efficiency vs. load current and input voltage for
SQ24T/S10050 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
10.00
8.00
6.00
4.00
10.00
8.00
6.00
4.00
70 C
55 C
40 C
36 V
24 V
18 V
2.00
2.00
0.00
0.00
0
2
4
6
8
10
12
0
2
4
6
8
10
12
Load Current [Adc]
Load Current [Adc]
Fig. 5.0V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S10050 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 5.0V.7: Power dissipation vs. load current and input
voltage for SQ24T/S10050 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 23 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S10050 (5.0 Volts Out)
Fig. 5.0V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (2 V/div.). Time scale: 2 ms/div.
Fig. 5.0V.10: Turn-on transient at full rated load current
(resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (2 V/div.). Time scale: 2 ms/div.
Fig. 5.0V.12: Output voltage response to load current step-
change (2.5A – 5A – 2.5A) at Vin = 24V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (2 A/div.).
Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F
ceramic. Time scale: 0.2 ms/div.
Fig. 5.0V.11: Output voltage response to load current step-
change (2.5A – 5A – 2.5A) at Vin = 24V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (2 A/div.).
Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2
ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 24 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S10050 (5.0 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 5.0V.13: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 5.0V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 5.0V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 5.0V.14 for test setup. Time scale:
1s/div.
Fig. 5.0V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 5.0V.14 for test setup. Time scale: 1 s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 25 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S10050 (5.0 Volts Out)
6.0
5.0
4.0
3.0
2.0
1.0
0
0
5
10
15
Iout [Adc]
Fig. 5.0V.18: Load current (top trace, 10 A/div., 20 ms/div.)
Fig. 5.0V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (10 A/div., 1 ms/div.) is an expansion of the on-time
portion of the top trace.
MCD10159 Rev. 1.2, 20-Apr-12
Page 26 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S15033 (3.3 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=3.3 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
15 ADC, 3.3 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
3.2
ADC
mADC
mADC
mAPK-PK
dB
3
100
6
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
3.267
3.300
3.333
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±2
±2
±5
±5
3.350
50
15,000
15
20
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
3.250
0
30
Non-latching
Non-latching. Short=10mꢀ.
Non-latching
18
30
40
5.3
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 450 μF tant. + 1 μF ceramic
100
100
100
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
88
88
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 27 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15033 (3.3 Volts Out)
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 3.3V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T15033 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
Fig. 3.3V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T15033 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 3.3V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S15033 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 3.3V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S15033 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 28 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15033 (3.3 Volts Out)
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
0.70
0.65
70 C
55 C
40 C
0.75
36 V
24 V
18 V
0.70
0.65
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 3.3V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S15033 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 3.3V.5: Efficiency vs. load current and input voltage for
SQ24T/S15033 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
8.00
6.00
4.00
8.00
6.00
4.00
70 C
55 C
40 C
36 V
24 V
2.00
2.00
0.00
18 V
0.00
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 3.3V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S15033 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 3.3V.7: Power dissipation vs. load current and input
voltage for SQ24T/S15033 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 29 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15033 (3.3 Volts Out)
Fig. 3.3V.10: Turn-on transient at full rated load current
Fig. 3.3V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (1 V/div.). Time scale: 2 ms/div.
(resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (1 V/div.). Time scale: 2 ms/div.
Fig. 3.3V.12: Output voltage response to load current step-
change (3.75A – 7.5A – 3.75A) at Vin = 24V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (5 A/div.).
Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F
ceramic. Time scale: 0.2 ms/div.
Fig. 3.3V.11: Output voltage response to load current step-
change (3.75A – 7.5A – 3.75A) at Vin = 24V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (5 A/div.).
Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale:
0.2 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 30 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15033 (3.3 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 3.3V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 3.3V.13: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 3.3V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 3.3V.14 for test setup. Time scale:
1s/div.
Fig. 3.3V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 3.3V.14 for test setup. Time scale: 1 s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 31 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15033 (3.3 Volts Out)
4
3
2
1
0
20
0
5
10
15
Iout [Adc]
Fig. 3.3V.18: Load current (top trace, 20 A/div., 20 ms/div.)
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (20 A/div., 1 ms/div.) is an expansion of the on-time
portion of the top trace.
Fig. 3.3V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
MCD10159 Rev. 1.2, 20-Apr-12
Page 32 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S15025 (2.5 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=2.5 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
15 ADC, 2.5 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
2.5
ADC
mADC
mADC
mAPK-PK
dB
3
67
6
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
2.475
2.500
2.525
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±2
±2
±5
±5
2.538
50
15,000
15
20
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
2.462
0
30
Non-latching
Non-latching. Short=10mꢀ.
Non-latching
18
30
40
5.3
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic)
Co = 450 μF tant. + 1 μF ceramic
110
120
150
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
86.5
87
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 33 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15025 (2.5 Volts Out)
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 2.5V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T15025 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
Fig. 2.5V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T15025 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 2.5V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S15025 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 2.5V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S15025 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 34 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15025 (2.5 Volts Out)
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.95
0.90
0.85
0.80
36 V
70 C
0.75
24 V
18 V
55 C
40 C
0.70
0.65
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 2.5V.5: Efficiency vs. load current and input voltage for
SQ24T/S15025 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
Fig. 2.5V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S15025 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
8.00
6.00
4.00
8.00
6.00
4.00
36 V
24 V
18 V
70 C
55 C
40 C
2.00
2.00
0.00
0.00
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 2.5V.7: Power dissipation vs. load current and input
voltage for SQ24T/S15025 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
Fig. 2.5V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S15025 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
MCD10159 Rev. 1.2, 20-Apr-12
Page 35 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15025 (2.5 Volts Out)
Fig. 2.5V.10: Turn-on transient at full rated load current
Fig. 2.5V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (1 V/div.). Time scale: 1 ms/div.
(resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (1 V/div.). Time scale: 1 ms/div.
Fig. 2.5V.12: Output voltage response to load current step-
change (3.75 A – 7.5 A – 3.75 A) at Vin = 24V. Top trace:
output voltage (100 mV/div.). Bottom trace: load current (5
A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F
ceramic. Time scale: 0.2 ms/div.
Fig. 2.5V.11: Output voltage response to load current step-
change (3.75 A – 7.5 A – 3.75 A) at Vin = 24V. Top trace:
output voltage (100 mV/div.). Bottom trace: load current (5
A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time
scale: 0.2 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 36 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15025 (2.5 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 2.5V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 2.5V.13: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 2.5V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 2.5V.14 for test setup. Time scale:
1s/div.
Fig. 2.5V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 2.5V.14 for test setup. Time scale: 1 s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 37 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15025 (2.5 Volts Out)
3
2
1
0
20
0
5
10
15
Iout [Adc]
Fig. 2.5V.18: Load current (top trace, 20 A/div., 20 ms/div.)
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (20 A/div., 1 ms/div.) is an expansion of the on-time
portion of the top trace.
Fig. 2.5V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
MCD10159 Rev. 1.2, 20-Apr-12
Page 38 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S15020 (2.0 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=2.0 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
2
15 ADC, 2.0 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
ADC
mADC
mADC
mAPK-PK
dB
3
57
6
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
1.98
2.000
2.02
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±2
±2
±5
±5
2.030
50
15,000
15
20
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
1.970
0
30
Non-latching
Non-latching. Short=10mꢀ.
Non-latching
18
30
40
5.3
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 450 μF tant. + 1 μF ceramic
100
120
150
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
85
85
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 39 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15020 (2.0 Volts Out)
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 2.0V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T15020 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
Fig. 2.0V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T15020 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 2.0V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S15020 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 2.0V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S15020 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 40 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15020 (2.0 Volts Out)
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
0.70
0.65
70 C
55 C
40 C
0.75
36 V
24 V
18 V
0.70
0.65
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 2.0V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S15020 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 2.0V.5: Efficiency vs. load current and input voltage for
SQ24T/S15020 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
6.00
5.00
4.00
3.00
6.00
5.00
4.00
3.00
70 C
55 C
40 C
2.00
36 V
24 V
18 V
2.00
1.00
0.00
1.00
0.00
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 2.0V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S15020 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 2.0V.7: Power dissipation vs. load current and input
voltage for SQ24T/S15020 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 41 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15020 (2.0 Volts Out)
Fig. 2.0V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (1 V/div.). Time scale: 1 ms/div.
Fig. 2.0V.10: Turn-on transient at full rated load current
(resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (1 V/div.). Time scale: 1 ms/div.
Fig. 2.0V.11: Output voltage response to load current step-
change (3.75A – 7.5A – 3.75A) at Vin = 24V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (5 A/div.).
Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale:
0.2 ms/div.
Fig. 2.0V.12: Output voltage response to load current step-
change (3.75A – 7.5A – 3.75A) at Vin = 24V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (5 A/div.).
Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F
ceramic. Time scale: 0.2 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 42 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15020 (2.0 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 2.0V.13: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 2.0V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 2.0V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 2.0V.14 for test setup. Time scale: 1 s/div.
Fig. 2.0V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 2.0V.14 for test setup. Time scale:
1s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 43 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15020 (2.0 Volts Out)
3
2
1
0
20
0
5
10
15
Iout [Adc]
Fig. 2.0V.18: Load current (top trace, 20 A/div., 20 ms/div.)
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (20 A/div., 2 ms/div.) is an expansion of the on-time
portion of the top trace.
Fig. 2.0V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
MCD10159 Rev. 1.2, 20-Apr-12
Page 44 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S15018 (1.8 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=1.8 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
15 ADC, 1.8 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
1.8
ADC
mADC
mADC
mAPK-PK
dB
3
53
6
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
1.782
1.800
1.818
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±2
±2
±4
±5
1.827
50
15,000
15
20
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1.
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
1.773
0
30
Non-latching
Non-latching. Short=10 mꢀ.
Non-latching
18
30
40
5.3
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 450 μF tant. + 1 μF ceramic
100
120
150
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
84.5
84
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 45 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15018 (1.8 Volts Out)
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 1.8V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T15018 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
Fig. 1.8V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T15018 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 1.8V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S15018 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 1.8V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S15018 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 46 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15018 (1.8 Volts Out)
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
0.70
0.65
70 C
55 C
40 C
0.75
36 V
24 V
18 V
0.70
0.65
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 1.8V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S15018 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 1.8V.5: Efficiency vs. load current and input voltage for
SQ24T/S15018 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
6.00
5.00
4.00
3.00
6.00
5.00
4.00
3.00
70 C
55 C
40 C
2.00
36 V
24 V
18 V
2.00
1.00
0.00
1.00
0.00
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 1.8V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S15018 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 1.8V.7: Power dissipation vs. load current and input
voltage for SQ24T/S15018 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 47 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15018 (1.8 Volts Out)
Fig. 1.8V.10: Turn-on transient at full rated load current
Fig. 1.8V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (1 V/div.). Time scale: 1 ms/div.
(resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (1 V/div.). Time scale: 1 ms/div.
Fig. 1.8V.12: Output voltage response to load current step-
change (3.75A – 7.5A – 3.75A) at Vin = 24V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (5 A/div.).
Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F
ceramic. Time scale: 0.2 ms/div.
Fig. 1.8V.11: Output voltage response to load current step-
change (3.75A – 7.5A – 3.75A) at Vin = 24V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (5 A/div.).
Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale:
0.2 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 48 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15018 (1.8 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 1.8V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 1.8V.13: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 1.8V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 1.8V.14 for test setup. Time scale:
1s/div.
Fig. 1.8V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 1.8V.14 for test setup. Time scale: 1 s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 49 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15018 (1.8 Volts Out)
3
2
1
0
20
0
5
10
15
Iout [Adc]
Fig. 1.8V.18: Load current (top trace, 20 A/div., 20 ms/div.)
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (20 A/div., 2 ms/div.) is an expansion of the on-time
portion of the top trace.
Fig. 1.8V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
MCD10159 Rev. 1.2, 20-Apr-12
Page 50 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S15015 (1.5 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=1.5 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
1.6
15 ADC, 1.5 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
ADC
mADC
mADC
mAPK-PK
dB
2.6
48
6
TBD
120 Hz
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
1.485
1.500
1.515
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±2
±2
±4
±4
1.523
50
15,000
15
20
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
1.477
0
30
Non-latching
Non-latching. Short=10mꢀ.
Non-latching
18
30
40
5.3
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 450 μF tant. + 1 μF ceramic
80
120
170
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
83
83
%
%
Additional Notes: 1.
-40 ºC to 85 ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 51 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15015 (1.5 Volts Out)
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 1.5V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T15015 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
Fig. 1.5V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T15015 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 1.5V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S15015 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 1.5V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S15015 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 52 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15015 (1.5 Volts Out)
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
0.70
0.65
70 C
55 C
40 C
0.75
36 V
24 V
18 V
0.70
0.65
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 1.5V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S15015 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 1.5V.5: Efficiency vs. load current and input voltage for
SQ24T/S15015 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
6.00
5.00
4.00
3.00
6.00
5.00
4.00
3.00
70 C
55 C
40 C
2.00
36 V
24 V
18 V
2.00
1.00
0.00
1.00
0.00
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 1.5V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S15015 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 1.5V.7: Power dissipation vs. load current and input
voltage for SQ24T/S15015 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 53 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15015 (1.5 Volts Out)
Fig. 1.5V.10: Turn-on transient at full rated load current
Fig. 1.5V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (0.5 V/div.). Time scale: 1 ms/div.
(resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (0.5 V/div.). Time scale: 1 ms/div.
Fig. 1.5V.12: Output voltage response to load current step-
change (3.75 A – 7.5 A – 3.75 A) at Vin = 24V. Top trace:
output voltage (100 mV/div.). Bottom trace: load current (5
A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F
ceramic. Time scale: 0.2 ms/div.
Fig. 1.5V.11: Output voltage response to load current step-
change (3.75 A – 7.5 A – 3.75 A) at Vin = 24V. Top trace:
output voltage (100 mV/div.). Bottom trace: load current (5
A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time
scale: 0.2 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 54 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15015 (1.5 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 1.5V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 1.5V.13: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 1.5V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 1.5V.14 for test setup. Time scale:
1s/div.
Fig. 1.5V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 1.5V.14 for test setup. Time scale: 1 s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 55 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15015 (1.5 Volts Out)
2.0
1.5
1.0
0.5
0
20
0
5
10
15
Iout [Adc]
Fig. 1.5V.18: Load current (top trace, 20 A/div., 20 ms/div.)
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (20 A/div., 2 ms/div.) is an expansion of the on-time
portion of the top trace.
Fig. 1.5V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
MCD10159 Rev. 1.2, 20-Apr-12
Page 56 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S15012 (1.2 Volts Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=1.2 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
15 ADC, 1.2 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
1.25
ADC
mADC
mADC
mAPK-PK
dB
2.6
43
6
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
1.188
1.200
1.212
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±1
±1
±3
±3
1.218
50
15,000
15
20
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
1.182
0
30
Non-latching
Non-latching. Short=10 mꢀ.
Non-latching
18
30
40
5.3
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 450 μF tant. + 1 μF ceramic
90
120
200
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
81
81
%
%
Additional Notes: 1.
-40ºC to 85ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 57 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15012 (1.2 Volts Out)
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 1.2V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T15012 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
Fig. 1.2V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T15012 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 1.2V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S15012 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 1.2V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S15012 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 58 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15012 (1.2 Volts Out)
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
0.70
0.65
70 C
55 C
40 C
0.75
36 V
24 V
18 V
0.70
0.65
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 1.2V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S15012 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 1.2V.5: Efficiency vs. load current and input voltage for
SQ24T/S15012 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
6.00
5.00
4.00
3.00
6.00
5.00
4.00
3.00
70 C
55 C
40 C
2.00
36 V
24 V
18 V
2.00
1.00
0.00
1.00
0.00
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 1.2V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S15012 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 1.2V.7: Power dissipation vs. load current and input
voltage for SQ24T/S15012 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 59 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15012 (1.2 Volts Out)
Fig. 1.2V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (0.5 V/div.). Time scale: 1 ms/div.
Fig. 1.2V.10: Turn-on transient at full rated load current
(resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (0.5 V/div.). Time scale: 1 ms/div.
Fig. 1.2V.12: Output voltage response to load current step-
change (3.75 A – 7.5 A – 3.75 A) at Vin = 24V. Top trace:
output voltage (100 mV/div.). Bottom trace: load current (5
A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F
ceramic. Time scale: 0.2 ms/div.
Fig. 1.2V.11: Output voltage response to load current step-
change (3.75 A – 7.5 A – 3.75 A) at Vin = 24V. Top trace:
output voltage (100 mV/div.). Bottom trace: load current (5
A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time
scale: 0.2 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 60 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15012 (1.2 Volts Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 1.2V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 1.2V.13: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 1.2V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 1.2V.14 for test setup. Time scale:
1s/div.
Fig. 1.2V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 1.2V.14 for test setup. Time scale: 1 s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 61 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15012 (1.2 Volts Out)
1.5
1.0
0.5
0
20
0
5
10
15
Iout [Adc]
Fig. 1.2V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
Fig. 1.2V.18: Load current (top trace, 20 A/div., 20 ms/div.)
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (20 A/div., 2 ms/div.) is an expansion of the on-time
portion of the top trace.
MCD10159 Rev. 1.2, 20-Apr-12
Page 62 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Electrical Specifications: SQ24T/S15010 (1.0 Volt Out)
Conditions: TA=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, Vout=1.0 VDC unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
15 ADC, 1.0 VDC Out @ 18 VDC In
Vin = 24 V, converter disabled
Vin = 24 V, converter enabled
25 MHz bandwidth
1.1
ADC
mADC
mADC
mAPK-PK
dB
2.6
43
7.5
120 Hz
TBD
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
0.990
1.000
1.010
VDC
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
±1
±1
±2
±3
1.015
50
15,000
15
20
mV
mV
VDC
mVPK-PK
μF
ADC
ADC
A
Over line, load and temperature1
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
0.985
0
30
Non-latching
Non-latching. Short=10 mꢀ.
Non-latching
18
30
40
5.3
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μs
di/dt = 5 A/μs
Co = 1 μF ceramic
Co = 450 μF tant. + 1 μF ceramic
80
140
180
mV
mV
µs
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
79
79
%
%
Additional Notes: 1.
-40ºC to 85ºC
MCD10159 Rev. 1.2, 20-Apr-12
Page 63 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15010 (1.0 Volt Out)
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 1.0V.1: Available load current vs. ambient air temperature
and airflow rates for SQ24T15010 converter with B height pins
mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1
and maximum FET temperature 120C.
Fig. 1.0V.2: Available load current vs. ambient air temperature
and airflow rates for SQ24T15010 converter with B height pins
mounted horizontally with Vin = 24V, air flowing from pin 3 to pin
1 and maximum FET temperature 120C.
20
15
10
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
5
30 LFM (0.15 m/s)
30 LFM (0.15 m/s)
0
0
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Ambient Temperature [°C]
Fig. 1.0V.4: Available load current vs. ambient temperature and
airflow rates for SQ24S15010 converter mounted horizontally
with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
Fig. 1.0V.3: Available load current vs. ambient temperature and
airflow rates for SQ24S15010 converter mounted vertically with
Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET
temperature 120C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 64 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15010 (1.0 Volt Out)
0.95
0.90
0.85
0.80
70 C
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.75
0.70
0.65
36 V
24 V
18 V
55 C
40 C
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 1.0V.6: Efficiency vs. load current and ambient
temperature for SQ24T/S15010 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 1.0V.5: Efficiency vs. load current and input voltage for
SQ24T/S15010 converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25C.
6.00
5.00
4.00
3.00
6.00
5.00
4.00
3.00
70 C
55 C
40 C
2.00
36 V
24 V
18 V
2.00
1.00
0.00
1.00
0.00
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current [Adc]
Load Current [Adc]
Fig. 1.0V.8: Power dissipation vs. load current and ambient
temperature for SQ24T/S15010 converter mounted vertically
with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
Fig. 1.0V.7: Power dissipation vs. load current and input
voltage for SQ24T/S15010 converter mounted vertically with
air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25C.
MCD10159 Rev. 1.2, 20-Apr-12
Page 65 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15010 (1.0 Volt Out)
Fig. 1.0V.10: Turn-on transient at full rated load current
Fig. 1.0V.9: Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 24V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (0.5 V/div.). Time scale: 1 ms/div.
(resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF
pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output
voltage (0.5 V/div.). Time scale: 1 ms/div.
Fig. 1.0V.12: Output voltage response to load current step-
change (3.75 A – 7.5 A – 3.75 A) at Vin = 24V. Top trace:
output voltage (100 mV/div.). Bottom trace: load current (5
A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F
ceramic. Time scale: 0.2 ms/div.
Fig. 1.0V.11: Output voltage response to load current step-
change (3.75 A – 7.5 A – 3.75 A) at Vin = 24V. Top trace:
output voltage (100 mV/div.). Bottom trace: load current (5
A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time
scale: 0.2 ms/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 66 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15010 (1.0 Volt Out)
iS
iC
10 H
source
inductance
TM
33 F
ESR <1
electrolytic
capacitor
1 F
ceramic
capacitor
Family
Q
DC/DC
Converter
Semi
Vout
Vsource
Fig. 1.0V.14: Test setup for measuring input reflected ripple
currents, ic and is.
Fig. 1.0V.13: Output voltage ripple (20 mV/div.) at full rated
load current into a resistive load with Co = 10 F tantalum +
1uF ceramic and Vin = 24 V. Time scale: 1 s/div.
Fig. 1.0V.16: Input reflected ripple current, is (10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 24V. Refer to Fig. 1.0V.14 for test setup. Time scale:
1s/div.
Fig. 1.0V.15: Input reflected ripple current, ic (100 mA/div.),
measured at input terminals at full rated load current and Vin =
24V. Refer to Fig. 1.0V.14 for test setup. Time scale: 1 s/div.
MCD10159 Rev. 1.2, 20-Apr-12
Page 67 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
SQ24T/S15010 (1.0 Volt Out)
1.5
1.0
0.5
0
20
0
5
10
15
Iout [Adc]
Fig. 1.0V.17: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has
almost no effect on current limit characteristic.
Fig. 1.0V.18: Load current (top trace, 20 A/div., 20 ms/div.)
into a 10 m short circuit during restart, at Vin = 24V. Bottom
trace (20 A/div., 2 ms/div.) is an expansion of the on-time
portion of the top trace.
MCD10159 Rev. 1.2, 20-Apr-12
Page 68 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Physical Information
SQ24S Platform Notes
All dimensions are in inches [mm]
Connector Material: Copper
Connector Finish: Gold over Nickel
Optional: Tin/Lead over Nickel
Converter Weight: 0.53 oz [15 g]
Recommended Surface-Mount Pads:
Min. 0.080” X 0.112” [2.03 x 2.84]
Max. 0.092” X 0.124” [2.34 x 3.15]
1
2
3
8
7
6
5
4
TOP VIEW
SIDE VIEW
Pad/Pin Connections
Pad/Pin #
Function
1
2
3
4
5
6
7
Vin (+)
ON/OFF
Vin (-)
Vout (-)
SENSE(-)
TRIM
SQ24S Pinout (Surface Mount)
SENSE(+)
8
Vout (+)
HT
CL
(Max. Height)
(Min. Clearance)
Height
Option
+0.000 [+0.00]
-0.038 [- 0.97]
+0.016 [+0.41]
-0.000 [- 0.00]
A
B
C
D
E
0.319 [8.10]
0.352 [8.94]
0.516 [13.11]
0.416 [10.57]
0.298 [7.57]
0.030 [0.77]
0.063 [1.60]
0.227 [5.77]
0.127 [3.23]
0.009 [0.23]
1
2
3
8
7
6
5
4
TOP VIEW
SIDE VIEW
PL
Pin Length
Pin
Option
±0.005 [±0.13]
A
B
C
0.188 [4.77]
0.145 [3.68]
0.110 [2.79]
SQ24T Platform Notes
All dimensions are in inches [mm]
Pins 1-3 and 5-7 are Ø 0.040” [1.02]
with Ø 0.078” [1.98] shoulder
Pins 4 and 8 are Ø 0.062” [1.57] without
shoulder
Pin Material and Finish: CDA 360 (brass)
with 200-300 u" matte SN over
100-150 u" N
SQ24T Pinout (Through-hole)
Converter Weight: 0.53 oz [15 g]
MCD10159 Rev. 1.2, 20-Apr-12
Page 69 of 70
www.power-one.com
SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Converter Part Numbering/Ordering Information
Pin
Length
[PL]
Product
Series
Input
Voltage
Mounting
Scheme
Rated Load
Current
Output
Voltage
ON/OFF
Logic
Maximum
Height [HT]
Special
Features
RoHS
SQ
24
S
05
080
-
N
S
0
0
15 15 A
S
Optional
Connector
Finish:
Tin/Lead
010 1.0 V
012 1.2 V
015 1.5 V
018 1.8 V
020 2.0 V
025 2.5 V
033 3.3 V
050 5.0 V
060 6.0 V
080 8.0 V
120 12.0 V
(1.0 – 3.3 V)
No Suffix
RoHS
lead-solder-
exemption
compliant
10 10 A
(5.0 V)
N
1/8th
Brick
Format
Negative
S
Surface
Mount
over Nickel
SMT
S 0.289”
SMT
0 0.00”
08 8 A
(6.0 V)
18-36 V
P
Positive
0 STD
G RoHS
compliant
for all six
05 5.3 A
(8.0 V)
T
Special
substances
Trim2
04 4 A
(12.0 V)
(For 1.2V &
1.0V only)
Pin
Length
[PL]
Product
Series3
Input
Voltage
Mounting
Scheme
Rated Load
Current
Output
Voltage
ON/OFF
Logic
Maximum
Height [HT]
Special
Features
RoHS
SQ
24
T
05
080
-
N
B
A
0
15 15 A
010 1.0 V
012 1.2 V
015 1.5 V
018 1.8 V
020 2.0 V
025 2.5 V
033 3.3 V
050 5.0 V
060 6.0 V
080 8.0 V
120 12.0 V
(1.0 – 3.3 V)
No Suffix
RoHS
lead-solder-
exemption
compliant
0 STD
10 10 A
(5.0 V)
Through hole
A 0.319”
B 0.352”
C 0.516”
D 0.416”
E 0.298”
Through
hole
A 0.188”
B 0.145”
C 0.110”
N
1/8th
Brick
Format
Negative
T
Through-
hole
08 8 A
(6.0 V)
18-36 V
T
Special
P
Positive
G RoHS
compliant
for all six
Trim2
05 5.3 A
(8.0 V)
(For 1.2V &
1.0V only)
substances
04 4 A
(12.0 V)
1. The example above describes P/N SQ24T05080-NBA0: 18-36 V input, through-hole mounting, 5.3 A @ 8.0 V output, negative ON/OFF logic,
a maximum height of 0.352”, a through the board pin length of 0.188”, and RoHS lead-solder-exemption compliancy. Please consult factory
regarding availability of a specific version.
2. For definitions, operation, and associated trim equations for all trim options please refer to Application Note 103, Trim Feature for Isolated dc-dc
converters.
3. All possible option combinations are not necessarily available for every model. Contact Customer Service to confirm
availability.
Model numbers highlighted in yellow or shaded are not recommended for new designs.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical components in
life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective
divisional president of Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date
manufactured. Specifications are subject to change without notice.
MCD10159 Rev. 1.2, 20-Apr-12
Page 70 of 70
www.power-one.com
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