PT6623P [ETC]
Analog IC ; 模拟IC\n
| 型号： | PT6623P |
| 厂家： | 
ETC |
| 描述： | Analog IC
|
| 文件： | 总6页 (文件大小：131K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PT6620 Series
6 Amp 12V Input
Integrated Switching Regulator
SLTS036B
(Revised 9/20/2000)
•
•
•
•
•
•
•
Single Device: 6A Output
Input Voltage Range: 9V to 16V
Adjustable Output Voltage
83% Efficiency
Remote Sense Capability
Standby Function
signed for stand-alone operation in
applications requiring as much as 6A
of output current. The PT6620 se-
ries is packaged in Power Trends’
standard 14-Pin SIP (Single In-line
Package), which is available in either
a vertical or horizontal configura-
tion. Two electrolytic capacitors are
required for proper operation.
Over-Temperature Protection
The PT6620 series is a line of 12V
bus Integrated Switching Regulators
(ISRs). These regulators are de-
Please note that this product does
not include short circuit protection.
Pin-Out Information Ordering Information PT Series Suffix
(PT1234X)
Pin
Function
Remote Sense
Do Not Connect
STBY*- Standby
Vin
PT6621¨ = +3.3 Volts
PT6622¨ = +1.5 Volts
PT6623¨ = +2.5 Volts
PT6624¨ = +3.6 Volts
PT6625¨ = +5.0 Volts
PT6626¨ = +9.0 Volts
PT6627¨ = +1.8 Volts
Case/Pin
Configuration
Heat
Heat Spreader
Spreader with Side Tabs
1
Standard Application
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
P
D
E
R
G
B
2
REMOTE SENSE
1
3
VIN
VOUT
4
4,5,6
3
11,12,13
PT6620
5
Vin
7,8,9,10
+
+
6
Vin
LOAD
C1
C2
STBY
COM
Q1
7
G
ND
ND
ND
COM
8
G
Pkg Style 400/410
(1)
C1 = Required 330µF electrolytic
C2 = Required 330µF electrolytic
Q1= NFET-or Open Collector Gate
9
G
Note: Back surface
of product is
conducting metal
(1)
10
11
12
13
14
GND
Vout
Vout
Vout
Vout Adjust
Specifications
PT6620 SERIES
Characteristics
(Ta = 25°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
(2)
(2)
Output Current
Io
Ta = 60°C, 200 LFM, pkg P
Ta = 25°C, natural convection
0.1
0.1
—
—
6.0
6.0
A
Input Voltage Range
Vin
∆Vo
Voadj
0.1A ≤ Io ≤ 6.0A
Vo ≤ +5V
+9
—
—
+16
+16
V
V
+6V≤Vo≤+9V
Vo+3
Output Voltage Tolerance
Output Voltage Adjust Range
Vin = +12V, Io = 6.0A
Ta = 0 to 60°C
Vo-0.1
—
Vo+0.1
Pin 14 to Vo or ground
Vo = +3.3V
Vo = +1.5V
Vo = +2.5V
Vo = +3.6V
Vo = +5.0V
Vo = +9.0V
2.3
1.4
1.9
2.5
2.9
5.2
—
—
—
—
—
—
4.5
2.6
3.7
4.8
6.5
10.0
V
Line Regulation
Load Regulation
Vo Ripple/Noise
Regline
Regload
Vn
Vin(min) ≤Vin≤Vin(max), Io = 6.0A
Vin = +12V, 0.1≤ Io≤6.0A
Vin = +12V, Io = 6.0A
—
—
0.5
0.5
1.0
1.0
%Vo
%Vo
Vo < +6V
Vo > +6V
—
—
50
—
—
mVpp
%Vo
1.0
Transient Response
with C2 = 330µF
ttr
Io step between 3.0A and 6.0A
Vo over/undershoot
—
—
100
150
—
—
µSec
mV
Vos
Efficiency
η
Vin = +12V, Io = 3.0A
Vo= +3.3/3.6V
Vo = +1.5V
Vo = +2.5V
Vo = +5.0V
Vo = +9.0V
—
—
—
—
—
84
68
76
86
93
—
—
—
—
—
%
%
Vin = +12V, Io =6.0A
Vo= +3.3/3.6V
Vo = +1.5V
Vo = +2.5V
Vo = +5.0V
Vo = +9.0V
—
—
—
—
—
83
66
75
85
92
—
—
—
—
—
Switching Frequency
ƒo
Vin(min) ≤Vin≤Vin(max)
0.1A ≤ Io ≤ 6.0
PT6622
Except PT6622
500
550
550
650
600
750
kHz
kHz
Continued
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6620 Series
6 Amp 12V Input
Integrated Switching Regulator
Specifications (continued)
PT6620 SERIES
Typ
Characteristics
(Ta = 25°C unless noted)
Symbols
Conditions
Min
Max
Units
(3)
Absolute Maximum
Ta
Over Vin range
-40
—
+85
°C
Operating Temperature Range
Storage Temperature
Mechanical Shock
Ts
—
—
—
-40
—
—
+125
—
°C
Per Mil-STD-883D, Method 2002.3
500
G’s
Mechanical Vibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, soldered in a PC board
—
—
7.5
14
—
—
G’s
Weight
—
—
grams
Notes: (1) The PT6620 Series requires a 330µF(output) and 100µF(input) electrolytic capacitors for proper operation in all application s.
(2) ISR will operate down to no load with reduced specifications
(3) See safe Operating Area curves or contact the factory for the appropriate derating.
T Y P I C A L
PT6620 Series @Vin=+12V (See Note A)
Efficiency vs Output Current
C H A R A C T E R I S T I C S
Safe Operating Area, Vin=+12V (See Note B)
PT6621/6622/6623P, Vo ≤3.3V
100
90
80
70
60
50
40
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
Airflow
PT6621
PT6622
PT6623
PT6625
PT6626
200LFM
120LFM
60LFM
Nat conv
0
1
2
3
4
5
6
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Output Current (A)
Iout (A)
Output Ripple vs Output Current
PT6625P, Vo =5.0V
30
25
20
15
10
5
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
Airflow
PT6621
PT6622
PT6623
PT6625
PT6626
Nat conv
60LFM
120LFM
200LFM
0
0
1
2
3
4
5
6
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Output Current (A)
Iout (A)
Power Dissipation vs Output Current
PT6626P, Vo =9.0V
5
4
3
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
Airflow
PT6621
PT6622
PT6623
PT6625
PT6626
Nat conv
60LFM
120LFM
200LFM
2
1
0
0
1
2
3
4
5
6
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Output Current (A)
Iout (A)
Note A: All characteristic data in the above graphs has been develped from actual products tested at 25°C. This data is considered typical for the ISR.
Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6620 Series
Figure 1
Adjusting the Output Voltage of the
PT6620 7Amp12V Bus Converter Series
1
The output voltage of the Power Trends PT6620 Series
ISRs may be adjusted higher or lower than the factory
trimmed pre-set voltage with the addition of a single
external resistor. Table 1 accordingly gives the allowable
Vsense
4,5,6
11,12,13
Vin
Vo
Vin
PT6620
Vo
STBY
GND
Vo(adj)
3
7,8,9,10 14
(R1)
Adj Down
adjustment range for each model in the series as V (min)
a
L
O
A
D
and Va (max).
+
+
C in
Cout
Adjust Up:
An increase in the output voltage is
R2
Adjust
Up
obtained by adding a resistor R2, between pin 14 (V ad-
o
just) and pins 7-10 (GND).
C O M
C O M
Adjust Down:
Add a resistor (R1), between pin 14 (V
o
adjust) and pins 11-13 (Vout).
Refer to Figure 1 and Table 2 for both the placement and value
of the required resistor, either (R1) or R2 as appropriate.
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulae.
Notes:
1. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the ISR as possible.
2. Never connect capacitors from Vo adjust to either GND,
Vout, or the Remote Sense pin. Any capacitance added to
the Vo adjust pin will affect the stability of the ISR.
3. If the Remote Sense feature is being used, connecting the
resistor (R1) between pin 14 (Vo adjust) and pin 1 (Remote
Sense) can benefit load regulation.
Ro (Va – 1.25)
(Vo – Va)
(R1)
R2
=
=
– Rs
kΩ
kΩ
1.25 Ro
Va - Vo
– Rs
4. The minimum input voltage required by the part is
Vout + 3, or 9V, whichever is higher.
Where: Vo = Original output voltage
Va = Adjusted output voltage
Ro = The resistance value in Table 1
Rs = The series resistance from Table 1
Table 1
PT6620 ADJUSTMENT AND FORMULA PARAMETERS
Series Pt #
PT6622
PT6623
PT6621
PT6624
PT6625
PT6626
V
(nom)
1.5V
1.4V
2.7V
4.99
2.49
2.5V
1.9V
3.7V
10.0
3.3V
2.3V
4.5V
12.1
3.6V
2.5V
4.8V
12.1
5.0V
2.9V
6.5V
16.2
9.0V
5.2V
10.0V
12.1
o
V (min)
a
V (max)
a
R
o
(kΩ)
R (k
s
Ω)
4.99
12.1
12.1
12.1
12.1
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes continued
PT6620 Series
Table 2
PT6620ADJUSTMENTRESISTORVALUES
Series Pt #
Current
PT6622
7.5Adc
1.5Vdc
PT6623
7.5Adc
2.5Vdc
PT6621
7.5Adc
3.3Vdc
PT6624
7.5Adc
3.6Vdc
PT6625
6.0Adc
5.0Vdc
Series Pt #
Current
PT6625
6Adc
PT6626
3.3Adc
9.0Vdc
Vo (nom)
Va (req’d)
Vo (nom)
5.0Vdc
V (req’d)
a
1.4
1.5
(5.0)kΩ
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6.0
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
7.0
7.1
7.2
7.3
7.4
7.5
7.6
7.8
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
9.8
10.0
89.1k
55.4k
38.5k
28.4k
21.7k
16.8k
13.2k
10.4k
8.2k
(0.5)kΩ
(1.1)kΩ
1.6
59.9k
28.7k
18.3k
13.1k
10.0k
7.9k
(1.9)kΩ
1.7
(2.6)kΩ
1.8
(3.4)kΩ
1.9
(5.8)kΩ
(10.0)kΩ
(16.3)kΩ
(26.7)kΩ
(47.5)kΩ
(110.0)kΩ
(4.2)kΩ
2.0
(5.1)kΩ
2.1
(6.1)kΩ
2.2
6.4k
(7.1)kΩ
2.3
5.3k
(0.6)kΩ
(3.4)kΩ
6.3k
(8.1)kΩ
2.4
4.4k
4.8k
(9.3)kΩ
2.5
3.8k
(6.8)kΩ
(1.7)kΩ
(4.2)kΩ
3.5k
(10.5)kΩ
(11.9)kΩ
(13.3)kΩ
(14.9)kΩ
(16.6)kΩ
(18.4)kΩ
(20.5)kΩ
(22.7)kΩ
(25.2)kΩ
(27.9)kΩ
(31.0)kΩ
(34.4)kΩ
(38.3)kΩ
(42.8)kΩ
(53.9)kΩ
(69.6)kΩ
(93.0)kΩ
(132.0)kΩ
(210.0)kΩ
(445.0)kΩ
2.6
3.2k
120.0k
57.5k
36.7k
26.3k
20.0k
15.8k
12.9k
10.6k
8.9k
(11.2)kΩ
(17.1)kΩ
(25.4)kΩ
(37.8)kΩ
(58.5)kΩ
(99.8)kΩ
(224.0)kΩ
2.4k
2.7
(7.4)kΩ
1.4k
2.8
(11.3)Ω
2.9
(16.4)kΩ
(23.2)kΩ
(32.7)kΩ
(46.9)kΩ
(70.6)kΩ
(118.0)kΩ
(260.0)kΩ
(0.6)kΩ
(2.1)kΩ
3.0
3.1
(3.7)Ω
3.2
(5.5)kΩ
3.3
(7.4)kΩ
3.4
139.0k
63.5k
38.3k
25.7k
18.2k
13.1k
9.5k
(9.7)kΩ
3.5
7.5k
(12.2)kΩ
(15.1)kΩ
(18.4)kΩ
(22.3)kΩ
(26.9)kΩ
(32.5)kΩ
(39.2)kΩ
(47.6)kΩ
(58.5)kΩ
(73.0)kΩ
(93.2)kΩ
(124.0)kΩ
(174.0)kΩ
(275.0)kΩ
(579.0)kΩ
3.6
6.4k
3.7
5.4k
139.0k
63.5k
38.3k
25.7k
18.2k
13.1k
9.5k
3.8
3.9
4.0
4.1
6.8k
4.2
4.7k
4.3
3.0k
4.4
1.7k
6.8k
4.5
0.5k
4.7k
4.6
3.0k
63.5k
25.7k
13.1k
6.8k
4.7
1.7k
4.8
0.5k
4.9
5.0
3.0k
5.1
190.0k
R1 = (Blue)
R2 = Black
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6620 Series
Figure 1
Using the Standby Function on the PT6620 Series
of 12V Bus Converters
For applications requiring output voltage On/Off control,
the 14-pin PT6620 ISR series incorporates a standby
function. This feature may be used for power-up/shut-
down sequencing, and wherever there is a requirement
for the output status of the module to be controlled by
external circuitry.
1
Vsense
4,5,6
11,12,13
Vin
Vo
V in
PT6620
Vo
STBY
GND
Vo(adj)
+
+
3
7,8,9,10 14
Cin
Cout
C O M
C O M
The standby function is provided by the STBY* control,
pin 3. If pin 3 is left open-circuit the regulator operates
normally, providing a regulated output whenever a valid
Q1
BSS138
Inhibit
supply voltage is applied to V (pins 4, 5, & 6) with re-
in
spect to GND (pins 7-10). Connecting pin 3 to ground 2
will disable the regulator output and reduce the input
current to less than 30mA 4. Grounding the standby con-
trol will also hold-off the regulator output during the
period that input power is applied.
+5V V in
Turn-On Time: Turning Q in Figure 1 off, removes the low-
1
voltage signal at pin 3 and enables the output. The PT6620
series of regulators will provide a fully regulated output voltage
within 20ms. The actual turn-on time may vary with load and
the total amount of output capacitance. Figure 2 shows the
typical output voltage waveform of a PT6625 (5.0V) following
the prompt turn-off of Q1 at time t =0 secs. The waveform was
measured with a 12V input voltage, and 5A resistive load.
The standby input is ideally controlled with an open-
collector (or open-drain) discrete transistor (See Figure
1). It can also be driven directly from a dedicated TTL3
compatible gate. Table 1 provides details of the threshold
requirements.
(2,3)
Table 1 Inhibit Control Thresholds
Parameter
Min
Max
Enable (V
)
)
1V
–0.1V
5V
0.3V
IH
Disable (V
IL
Figure 2
Notes:
1. The Standby/Inhibit control logic is similar for all Power
Trends’ modules, but the flexibility and threshold
tolerances will be different. For specific information on
this function for other regulator models, consult the
applicable application note.
Vo (2V/Div)
2. The Standby input on the PT6620 regulator series may be
controlled using either an open-collector (or open-drain)
discrete transistor, or a device with a totem-pole output. A
pull-up resistor is not necessary. The control input has an
open-circuit voltage of about 1.5Vdc. To disable the
regulator output, the control pin must be “pulled” to less
than 0.3Vdc with a low-level 0.25mA max. sink to ground.
3. The Standby input on the PT6620 series is also compatible
with TTL logic. A standard TTL logic gate will meet the
0.3V VIL(max) requirement (Table 1 ) at 0.25mA sink
current. Do not drive the Standby control input above
5Vdc.
0
2
4
6
8
10
12
14
16
18
t (milli - secs)
4. When the regulator output is disabled the current drawn
from the input source is reduced to approximately 15mA
(30mA maximum).
5. The turn-off time of Q1, or rise time of the standby input
is not critical on the PT6620 series. Turning Q1 off slowly,
over periods up to 100ms, will not damage the regulator.
However, a slow turn-off time will increase both the initial
delay and rate-of-rise of the output voltage.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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any product or service without notice, and advise customers to obtain the latest version of relevant information
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pertaining to warranty, patent infringement, and limitation of liability.
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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Customers are responsible for their applications using TI components.
In order to minimize risks associated with the customer’s applications, adequate design and operating
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Copyright 2000, Texas Instruments Incorporated
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