R1224N132F-TR [ETC]
SMPS Controller ; SMPS控制器\n
| 型号： | R1224N132F-TR |
| 厂家： | 
ETC |
| 描述： | SMPS Controller
|
| 文件： | 总36页 (文件大小：502K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
2002. Nov. 5
PWM/VFM step-down DC/DC Converter
R1224N Series
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ꢀ OUTLINE
The R1224N Series are CMOS-based PWM step-down DC/DC Converter controllers with low supply current.
Each of these ICs consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a
phase compensation circuit, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, a chip enable
circuit, resistors for output voltage detect, and input voltage detect circuit. A low ripple, high efficiency step-down
DC/DC converter can be easily composed of this IC with only several external components, or a power-transistor, an
inductor, a diode and capacitors. Output Voltage is fixed or can be adjusted with external resistors (Adjustable types
are without PWM/VFM alternative circuit).
With a PWM/VFM alternative circuit, when the load current is small, the operation is automatically switching into
the VFM oscillator from PWM oscillator. Therefore, the efficiency at small load current is improved. Several types of
the R1224NXXX, which are without a PWM/VFM alternative circuit, are also available.
If the term of maximum duty cycle keeps on a certain time, the embedded protection circuit works. The protection
circuit is Reset-type protection circuit, and it works to restart the operation with soft-start and repeat this operation
until maximum duty cycle condition is released. When the cause of large load current or something else is removed,
the operation is automatically released and returns to normal operation.
Further, built-in UVLO function works when the input voltage is equal or less than UVLO threshold, it makes this IC
be standby and suppresses the consumption current and avoid an unstable operation.
ꢀ FEATURES
ꢁ Range of Input Voltage • • • • • • • • • • • • •2.3V∼18.5V
ꢁ Built-in Soft-start Function and Protection Function (Reset type protection)
ꢁ Three options of Oscillator Frequency • • • • • •180kHz, 300kHz, 500kHz
ꢁ High Efficiency • • • • • • • • • • • • • • • • • •Typ. 90%
ꢁ Output Voltage • • • • • • • • • • • • • Stepwise Setting with a step of 0.1V in the range of 1.2V to 6.0V as
fixed voltage type. Reference Voltage of Adjustable Type is 1.0V
ꢁ Standby Current • • • • • • • • • • • • • • • • •Typ. 0.0µA
ꢁ High Accuracy Output Voltage • • • • • • • • • •±2.0%
ꢁ Low Temperature-Drift Coefficient of Output Voltage • • • • • Typ. ±100ppm/°C
ꢀ APPLICATIONS
ꢁ Power source for hand-held communication equipment, cameras, video instruments such as VCRs,
camcorders.
ꢁ Power source for battery-powered equipment.
ꢁ Power source for household electrical appliances.
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Rev. 1.12
- 1 -
ꢀ BLOCK DIAGRAM
*Fixed Output Voltage Type
OSC
VOUT
VIN
Amp
Vref
EXT
PWM/VFM
Soft Start
CONTROL
CE
Chip Enable
Protection
Vref
UVLO
GND
*Adjustable Output Voltage Type
OSC
VFB
VIN
Amp
Vref
EXT
PWM/VFM
Soft Start
Chip Enable
CONTROL
CE
Protection
Vref
UVLO
GND
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Rev. 1.12
- 2 -
ꢀ SELECTION GUIDE
In the R1224N Series, the output voltage, the oscillator frequency, the optional function, and the taping type
for the ICs can be selected at the user’s request.
The selection can be made with designating the part number as shown below;
R1224NXX2X-TR
↑ ↑ ↑
a b c
Code
a
Contents
Setting Output Voltage(VOUT):
Stepwise setting with a step of 0.1V in the range of 1.2V to 6.0V is possible.
Adjustable type; a=10 means Reference voltage=1.0V Optional Function is G/H/M.
Designation of Oscillator Frequency
b
c
2 : fixed
Designation of Optional Function
E : 300kHz, with a PWM/VFM alternative circuit
F : 500kHz, with a PWM/VFM alternative circuit
G : 300kHz, without a PWM/VFM alternative circuit
H : 500kHz, without a PWM/VFM alternative circuit
L : 180kHz, with a PWM/VFM alternative circuit
M : 180kHz, without a PWM/VFM alternative circuit
ꢀ PIN CONFIGURATION
ꢁ SOT-23-5
5
4
VIN
EXT
(mark side)
VOUT
CE GND (VFB
)
2
3
1
ꢀ PIN DESCRIPTION
Symbol
Description
Pin No.
1
2
3
4
5
CE
GND
Chip Enable Pin (Active with “H”)
Ground Pin
Pin for Monitoring Output Voltage(Feedback Voltage)
External Transistor Drive Pin(CMOS Output)
Power Supply Pin
V
/(V
)
OUT
FB
EXT
V
IN
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Rev. 1.12
- 3 -
ꢀ ABSOLUTE MAXIMUM RATINGS
(GND=0V)
Symbol
Item
Supply Voltage
Rating
20
Unit
V
V
IN
V
IN
V
V
EXT Pin Output Voltage
CE Pin Input Voltage
V
V
EXT
-0.3∼V +0.3
IN
CE
-0.3∼V +0.3
IN
V
/(V
EXT
)
V /V Pin Input Voltage
OUT FB
EXT Pin Inductor Drive Output Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
V
OUT
FB
-0.3∼V +0.3
IN
I
mA
mW
°C
°C
50
250
-40∼+85
-55∼+125
P
D
Topt
Tstg
ꢀ ELECTRICAL CHARACTERISTICS
ꢁR1224Nxx2X (X=E/F/G/H/L/M) except R1224N102X
(Topt=25°C)
Symbol
Item
Conditions
+1.5V, I
Min.
2.3
Typ.
Max. Unit
V
IN
Operating Input Voltage
Step-down Output Voltage
18.5
V
V
V
OUT
V =V
When V
V
SET
=-100mA
V
SET
IN
CE= SET
OUT
V
SET
×
V
SET
×
≤1.5V, V =V =3.0V
0.98
1.02
IN
CE
Step-down Output Voltage
Temperature Coefficient
Oscillator Frequency
ppm
/°C
kHz
∆V
/
-40°C ≤ Topt ≤ 85°C
V =V =V +1.5V, I =-100mA
OUT
100
OUT
∆T
fosc
IN
CE
SET
When V
≤1.5, V =V =3.0V
SET
IN CE
144
240
400
180
300
500
216
360
600
L/M version
E/G version
F/H version
Oscillator Frequency
%
/°C
µA
∆f
/
-40°C ≤ Topt ≤ 85°C
0.2
OSC
∆T
Temperature Coefficient
I
Supply Current1
V =V =V =18.5V
DD1
IN
CE
OUT
E/F/L/M version
G version
H version
20
30
40
0.0
-17
30
50
60
80
0.5
I
Standby Current
V =18.5V, V =0V, V
=0V
=8V,V =8V
=0V,V =8V
stb
IN
CE
OUT
µA
-10 mA
mA
I
EXT "H" Output Current
EXT "L" Output Current
CE "H" Input Current
CE "L" Input Current
CE "H" Input Voltage
CE "L" Input Voltage
V =8V,V
=7.9V,V
=0.1V,V
EXTH
IN
EXT
OUT
CE
I
V =8V,V
20
EXTL
IN
EXT
OUT
CE
I
V =V =V =18.5V
0.0
0.0
0.5
CEH
IN
CE
OUT
µA
µA
V
V
%
%
V
I
V = V
=18.5V, V =0V
-0.5
1.5
CEL
IN
OUT
CE
V
V
V =8V,V
=0V
=0V
CEH
IN
OUT
V =8V,V
0.3
CEL
IN
OUT
Maxdty Oscillator Maximum Duty Cycle
VFMdty VFM Duty Cycle
100
1.8
E/F/L version
V =V =2.5V to 1.5V, V
35
2.0
UVLO
+0.1
10
V
V
UVLO Voltage
UVLO Release Voltage
=0V
=0V
2.2
2.3
UVLO1
IN
CE
OUT
OUT
V =V =1.5V to 2.5V, V
V
1
V
UVLO2
IN
CE
Delay Time by Soft-Start function
Delay Time for protection circuit
T
V =V
+1.5V, I
=-10mA
5
5
20
30
ms
ms
start
IN
SET
=0V->V
OUT
+1.5V
V
CE
SET
T
V =V =V
+1.5V
15
prot
IN
CE
SET
+1.5V->0V
V
OUT
=V
SET
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Rev. 1.12
- 4 -
ꢁR1224N102X (X=G/H/M)
(Topt=25°C)
Typ. Max. Unit
Symbol
Item
Conditions
V =V =3.5V, I =-100mA
Min.
2.3
0.98
V
IN
Operating Input Voltage
Feedback Voltage
18.5
1.02
V
V
ppm
/°C
kHz
V
FB
1.00
100
IN
CE
FB
Feedback Voltage
∆V
∆T
fosc
/
-40°C ≤ Topt ≤ 85°C
FB
Temperature Coefficient
Oscillator Frequency
V =V =3.5V, I =-100mA
IN
CE
FB
M version
G version
H version
144
240
400
180
300
500
0.2
216
360
600
Oscillator Frequency
Temperature Coefficient
%
/°C
∆f
/
-40°C ≤ Topt ≤ 85°C
OSC
∆T
I
Supply Current1
V =V =V =18.5V
DD1
IN
CE
FB
µA
M version
G version
H version
20
30
50
60
80
0.5
40
I
stb
Standby Current
V =18.5V, V =0V, V =0V
0.0
-17
30
0.0
0.0
IN
CE
FB
µA
mA
mA
µA
µA
V
I
EXT "H" Output Current
EXT "L" Output Current
CE "H" Input Current
CE "L" Input Current
CE "H" Input Voltage
CE "L" Input Voltage
V =8V,V
=7.9V,V =8V,V =8V
FB CE
EXTH
IN
EXT
I
V =8V,V
=0.1V,V =0V,V =8V
EXTL
IN
EXT
FB CE
I
V =V =V =18.5V
0.5
CEH
IN
CE
FB
I
V = V =18.5V, V =0V
-0.5
1.5
CEL
IN
FB
CE
V
CEH
V =8V,V =0V
IN FB
V
V =8V,V =0V
0.3
V
CEL
IN
FB
Maxdty Oscillator Maximum Duty Cycle
100
1.8
%
V
V
V
V
UVLO Voltage
UVLO Release Voltage
V =V =2.5V to 1.5V, V =0V
2.0
UVLO
+0.1
10
2.2
2.3
UVLO1
IN
CE
FB
V =V =1.5V to 2.5V, V =0V
V
1
UVLO2
IN
CE
FB
Delay Time by Soft-Start function
Delay Time for protection circuit
T
V =2.5V, I =-10mA
5
5
20
30
ms
ms
start
IN
FB
V
CE
=0V->2.5V
T
V =V =2.5V
15
prot
IN
CE
V
FB
=2.5V->0V
ꢀ TYPICAL APPLICATION AND APPLICATION HINTS
(1) Fixed Output Voltage Type (R1224Nxx2E/F/G/H/L/M except xx=10)
L
PMOS
C1
R1
VIN
CE
EXT
VOUT
C3
SD
GND
C2
LOAD
CE CONTROL
PMOS: HAT1044M (Hitachi) L: CR105-270MC (Sumida, 27µH)
SD1: RB063L-30 (Rohm) C3: 47µF (Tantalum Type)
C1: 10µF (Ceramic Type) C2: 0.1µF (Ceramic Type)
R1: 10Ω
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Rev. 1.12
- 5 -
(2) Adjustable Output Type (R1224N102G/H/M) Example: Output Voltage=3.2V
L
PMOS
C4
C1
R4
R1
R3
VIN
CE
EXT
VFB
C3
SD
GND
R2
C2
LOAD
CE CONTROL
PMOS: HAT1044M (Hitachi) L: CR105-270MC (Sumida, 27µH)
SD1: RB063L-30 (Rohm) C3: 47µF (Tantalum Type)
C1: 10µF (Ceramic Type) C2: 0.1µF (Ceramic Type) C4: 1000pF(Ceramic Type)
R1: 10Ω, R2=22kΩ, R3=2.7kΩ, R4=33kΩ
When you use these ICs, consider the following issues;
ꢁ As shown in the block diagram, a parasitic diode is formed in each terminal, each of these diodes is not formed for
load current, therefore do not use it in such a way. When you control the CE pin by another power supply, do not
make its "H" level more than the voltage level of VIN pin.
ꢁ Set external components as close as possible to the IC and minimize the connection between the components and
the IC. In particular, a capacitor should be connected to VOUT pin with the minimum connection. Make sufficient
ground and reinforce supplying. A large switching current could flow through the connection of power supply, an
inductor and the connection of VOUT. If the impedance of the connection of power supply is high, the voltage level of
power supply of the IC fluctuates with the switching current. This may cause unstable operation of the IC.
ꢁ Protection circuit may work if the maximum duty cycle continue for the time defined in the electrical characteristics.
Once after stopping the output voltage, output will restart with soft-start operation. If the difference between input
voltage and output voltage is small, the protection circuit may work.
ꢁ Use capacitors with a capacity of 22µF or more for VOUT pin, and with good high frequency characteristics such as
tantalum capacitors. We recommend you to use output capacitors with an allowable voltage at least twice as much
as setting output voltage. This is because there may be a case where a spike-shaped high voltage is generated by
an inductor when an external transistor is on and off.
ꢁ Choose an inductor that has sufficiently small D.C. resistance and large allowable current and is hard to reach
magnetic saturation. And if the value of inductance of an inductor is extremely small, the ILX may exceed the absolute
maximum rating at the maximum loading.
Use an inductor with appropriate inductance.
ꢁ Use a diode of a Schottky type with high switching speed, and also pay attention to its current capacity.
ꢁ Do not use this IC under the condition with VIN voltage at equal or less than minimum operating voltage.
ꢁ When the threshold level of an external power MOSFET is rather low and the drive-ability of voltage supplier is
small, if the output pin is short circuit, input voltage may be equal or less than UVLO detector threshold. In this case,
the devise is reset with UVLO function that is different from the reset-protection function caused by maximum duty
cycle.
ꢁ With the PWM/VFM alternative circuit, when the on duty cycle of switching is 35% or less, the R1225N alters from
PWM mode to VFM mode (Pulse skip mode). The purpose of this circuit is raising the efficiency with a light load by
skipping the frequency and suppressing the consumption current. However, the ratio of output voltage against input
voltage is 35% or less, (ex. Vin>8.6V and Vout=3.0V) even if the large current may be loaded, the IC keeps its VFM
mode. As a result, frequency might be decreased, and oscillation waveform might be unstable. These phenomena
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Rev. 1.12
- 6 -
are the typical characteristics of the IC with PWM/VFM alternative circuit.
✰ The performance of power source circuits using these ICs extremely depends upon the peripheral circuits.
Pay attention in the selection of the peripheral circuits. In particular, design the peripheral circuits in a way that the
values such as voltage, current, and power of each component, PCB patterns and the IC do not exceed their
respected rated values.
ꢀ How to Adjust Output Voltage and about Phase Compensation
As for Adjustable Output type, feedback pin (VFB) voltage is controlled to maintain 1.0V.
Output Voltage, VOUT is as following equation:
VOUT: R2+R4=VFB: R2
VOUT=VFB×(R2+R4)/R2
Thus, with changing the value of R2 and R4, output voltage can be set in the specified range.
In the DC/DC converter, with the load current and external components such as L and C, phase might be behind 180
degree. In this case, the phase margin of the system will be less and stability will be worse. To prevent this, phase
margin should be secured with proceeding the phase. A pole is formed with external components L and C3.
Fpole ∼1/2π√L×C3
A zero (signal back to zero) is formed with R4 and C4.
≅Fzero∼1/(2π×R4×C4)
For example, if L=27µH, C3=47µF, the cut off frequency of the pole is approximately 4.5kHz.
To make the cut off frequency of the pole as much as 4.5kHz, set R4=33kΩ and C4=1000pF.
If VOUT is set at 2.5V, R2=22kΩ is appropriate.
R3 prevents feedback of the noise to VFB pin, about 2.7kΩ is appropriate value.
L
PMOS
C4
C1
R4
R1
R3
VIN
CE
EXT
VFB
C3
SD
GND
R2
C2
LOAD
CE CONTROL
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Rev. 1.12
- 7 -
ꢀ OPERATION of step-down DC/DC converter and Output Current
The step-down DC/DC converter charges energy in the inductor when Lx transistor is ON, and discharges the energy
from the inductor when Lx transistor is OFF and controls with less energy loss, so that a lower output voltage than
the input voltage is obtained. The operation will be explained with reference to the following diagrams:
<Basic Circuits>
<Current through L>
i1
ILmax
IOUT
ILmin
L
topen
VIN
Lx Tr
SD
VOUT
i2
CL
ton
toff
T=1/fosc
Step 1: Lx Tr. turns on and current IL (=i1) flows, and energy is charged into CL. At this moment, IL increases from
ILmin. (=0) to reach ILmax. in proportion to the on-time period(ton) of LX Tr.
Step 2: When Lx Tr. turns off, Schottky diode (SD) turns on in order that L maintains IL at ILmax, and current IL (=i2)
flows.
Step 3: IL decreases gradually and reaches ILmin. after a time period of topen, and SD turns off, provided that in the
continuous mode, next cycle starts before IL becomes to 0 because toff time is not enough. In this case, IL value is
from this ILmin (>0).
In the case of PWM control system, the output voltage is maintained by controlling the on-time period (ton), with the
oscillator frequency (fosc) being maintained constant.
ꢁ Discontinuous Conduction Mode and Continuous Conduction Mode
The maximum value (ILmax) and the minimum value (ILmin) current which flow through the inductor is the same
as those when Lx Tr. is ON and when it is OFF.
The difference between ILmax and ILmin, which is represented by ∆I;
∆I = ILmax – ILmin = VOUT × topen / L = (VIN-VOUT)×ton/L⋅⋅⋅Equation 1
wherein, T=1/fosc=ton+toff
duty (%)=ton/T×100=ton× fosc × 100
topen
≤
toff
In Equation 1, VOUT×topen/L and (VIN-VOUT)×ton/L are respectively shown the change of the current at ON, and
the change of the current at OFF.
When the output current (IOUT) is relatively small, topen < toff as illustrated in the above diagram. In this case, the
energy is charged in the inductor during the time period of ton and is discharged in its entirely during the time period
of toff, therefore ILmin becomes to zero (ILmin=0). When Iout is gradually increased, eventually, topen becomes to
toff (topen=toff), and when IOUT is further increased, ILmin becomes larger than zero (ILmin>0). The former mode is
referred to as the discontinuous mode and the latter mode is referred to as continuous mode.
In the continuous mode, when Equation 1 is solved for ton and assumed that the solution is tonc,
tonc=T×VOUT/VIN⋅⋅⋅ Equation 2
When ton<tonc, the mode is the discontinuous mode, and when ton=tonc, the mode is the continuous mode.
ꢀ OUTPUT CURRENT AND SELECTION OF EXTERNAL COMPONENTS
When Lx Tr. is ON:
(Wherein, Ripple Current P-P value is described as IRP, ON resistance of LX Tr. is described as Rp the direct
current of the inductor is described as RL.)
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Rev. 1.12
- 8 -
VIN=VOUT+(Rp+RL)×IOUT+L×IRP/ton ⋅⋅⋅Equation 3
When Lx Tr. is OFF:
L×IRP/toff = VF+VOUT+RL×IOUT ⋅⋅⋅Equation 4
Put Equation 4 to Equation 3 and solve for ON duty, ton/(toff+ton)=DON,
DON=(VOUT+VF+RL×IOUT)/(VIN+VF-Rp×IOUT)⋅⋅⋅Equation 5
Ripple Current is as follows;
IRP=(VIN-VOUT-Rp×IOUT-RL×IOUT)×DON/f/L …Equation 6
Wherein, peak current that flows through L, Lx Tr., and SD is as follows;
ILmax=IOUT+IRP/2…Equation 7
Consider ILmax, condition of input and output and select external components.
ꢂThe above explanation is directed to the calculation in an ideal case in continuous mode.
ꢀ External Components
1. Inductor
Select an inductor that peak current does not exceed ILmax. If larger current than allowable current flows,
magnetic saturation occurs and make transform efficiency worse.
When the load current is definite, the smaller value of L, the larger the ripple current.
Provided that the allowable current is large in that case and DC current is small, therefore, for large output current,
efficiency is better than using an inductor with a large value of L and vice versa.
2. Diode
Use a diode with low VF (Schottky type is recommended.) and high switching speed.
Reverse voltage rating should be more than VIN and current rating should be equal or more than ILmax.
3. Capacitors
As for CIN, use a capacitor with low ESR (Equivalent Series Resistance) and a capacity of at least 10µF for stable
operation.
COUT can reduce ripple of Output Voltage, therefore 47µF or more value of tantalum type capacitor is
recommended.
4. Lx Transistor
Pch Power MOSFET is required for this IC.
Its breakdown voltage between gate and source should be a few V higher than Input Voltage.
In the case of Input Voltage is low, to turn on MOSFET completely, to use a MOSFET with low threshold voltage is
effective.
If a large load current is necessary for your application and important, choose a MOSFET with low ON resistance
for good efficiency.
If a small load current is mainly necessary for your application, choose a MOSFET with low gate capacity for good
efficiency.
Maximum continuous drain current of MOSFET should be larger than peak current, ILmax.
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Rev. 1.12
- 9 -
ꢀ TIMING CHART
VOUT Set Output Voltage
UVLO Voltage
VIN
Input Voltage
Rising Time
UVLO Reset
VOUT Set Output Voltage
CE
Protection circuit delay time
VOUT Set Output
Voltage
EXT
Reset Protection
VOUT Set Output
Voltage
VOUT
Stable
Operation
Stable
Operation
Stable
Operation
Soft-start
Soft-start
Soft-start
Soft-start
The timing chart shown above describes the changing process of input voltage rising, stable operating, operating
with large current, stable operating, input voltage falling, input voltage recovering, and stable operating.
First, until when the input voltage (VIN) reaches UVLO voltage, the circuit inside keeps the condition of pre-standby.
Second, after VIN becomes beyond the UVLO threshold, soft-start operation starts, when the soft-start operation
finishes, the operation becomes stable.
If too large current flows through the circuit because of short or other reasons, EXT signal ignores that during the
delay time of protection circuit. (The current value depends on the circuit.)
After the delay time passes, reset protection works, or EXT signal will be "H", then output will turn off, then soft-start
operation starts. After the soft-start operation, EXT signal will be "L", but if the large current is still flowing, after the
delay time of protection circuit passes, reset protection circuit will work again, the operation will be continuously
repeated unless the cause of large current flowing is not removed.
Once the cause of the large current flowing is removed, within the delay time, the operation will be back to the
stable one.
If the timing for release the large current is in the protection process, the operation will be back to the normal one
after the soft-start operation.
If the VIN becomes lower than the set VOUT, that situation is same as large current condition, so protection circuit
may be ready to work, therefore, after the delay time of protection circuit, EXT will be "H".
Further, if the VIN is lower than UVLO voltage, the circuit inside will be stopped by UVLO function.
After that, if VIN rises, until when the VIN reaches UVLO voltage, the circuit inside keeps the condition of spre-
standby.
Then after VIN becomes beyond the UVLO threshold, soft-start operation starts, when the soft-start operation
finishes, the operation becomes stable.
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Rev. 1.12
- 10 -
ꢀ TEST CIRCUITS
A) Output Voltage, Oscillator Frequency, CE”H” Input Voltage, CE”L” Input Voltage, Soft-start time
L1
PMOS
EXT
VIN
CE
Oscilloscope
D1
GND
VOUT
(VFB)
+
-
C1
+
-
C2
V
B) Supply Current1
C) Standby Current
A
EXT
VIN
CE
EXT
VIN
A
GND
GND
VOUT
(VFB)
VOUT
(VFB)
CE
D) EXT “H” Output Current
E) EXT “L” Output Current
EXT
VIN
CE
EXT
VIN
CE
GND
A
GND
VOUT
(VFB)
A
VOUT
(VFB)
F) CE “H” Input Current, CE “L” Input Current
G) Output Delay Time for Protection Circuit
EXT
VIN
EXT
VIN
CE
Oscilloscope
GND
GND
+
-
C2
VOUT
(VFB)
CE
VOUT
(VFB)
A
PMOS: HAT1044M (Hitachi) L: CD104-270MC (Sumida, 27µH)
SD1: RB491D (Rohm)
C1: 47µF (Tantalum Type) C2: 47µF (Tantalum Type)
12345
Rev. 1.12
- 11 -
ꢀ TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current (*Note)
R1224N182E
L=10uH
R1224N182F
L=10uH
1.850
1.830
1.810
1.790
1.770
1.750
1.850
1.830
1.810
1.790
1.770
1.750
Vin3.3V
Vin3.3V
Vin5V
Vin5V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout (mA)
R1224N182H
L=10uH
R1224N182G
L=10uH
1.850
1.830
1.810
1.790
1.770
1.750
1.850
1.830
1.810
1.790
1.770
1.750
Vin3.3V
Vin5V
Vin3.3V
Vin5V
Vin12V
Vin12V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout (mA)
Output Current Iout (mA)
R1224N182L L=27uH
R1224N182M L=27uH
1.850
1.830
1.810
1.790
1.770
1.750
1.850
1.830
1.810
1.790
1.770
1.750
Vin3.3V
Vin5V
Vin3.3V
Vin5V
Vin12V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout (mA)
Output Current Iout (mA)
12345
Rev. 1.12
- 12 -
R1224N332E
L=10uH
R1224N332F
L=10uH
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
Vin4.8V
Vin7V
Vin4.8V
Vin7V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout (mA)
Output Current Iout (mA)
R1224N332G L=10uH
R1224N332G(V IN=10V)
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
3.35
3.34
3.33
3.32
3.31
3.30
Vin4.8V
Vin12V
Vin15V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current I OUT(mA)
Output Current Iout (mA)
R1224N332H L=10uH
R1224N332G(V IN=16V)
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
3.35
3.34
3.33
3.32
3.31
3.30
Vin4.8V
Vin12V
Vin15V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current I OUT(mA)
Output Current Iout (mA)
12345
Rev. 1.12
- 13 -
R1224N332L
L=27uH
R1224N332M L=27uH
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
Vin4.8V
Vin12V
Vin15V
Vin4.8V
Vin7V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout (mA)
Output Current Iout (mA)
R1224N332M(VIN=5V)
R1224N332M(VIN=10V)
3.35
3.34
3.33
3.32
3.31
3.30
3.35
3.34
3.33
3.32
3.31
3.30
0
1
2
3
4
5
0
1
2
3
4
5
Output Current IOUT(A)
Output Current IOUT(A)
R1224N502E
L=10uH
R1224N332M(VIN=18V)
5.100
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
3.35
3.34
3.33
3.32
3.31
3.30
Vin6.5V
Vin10V
0.1
1
10
100
1000
10000
0
1
2
3
4
Output Current Iout (mA)
Output Current IOUT(A)
12345
Rev. 1.12
- 14 -
R1224N502G
L=10uH
R1224N502F L=10uH
5.100
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
5.100
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
Vin6.5V
Vin12V
Vin15V
Vin6.5V
Vin10V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout (mA)
Output Current Iout (mA)
R1224N502G(VIN=10V)
R1224N502G(VIN=16V)
5.05
5.04
5.03
5.02
5.01
5.00
5.05
5.04
5.03
5.02
5.01
5.00
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1224N502H L=10uH
R1224N502L
L=27uH
5.100
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
5.100
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
Vin6.5V
Vin12V
Vin15V
Vin6.5V
Vin10V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout (mA)
Output Current Iout (mA)
12345
Rev. 1.12
- 15 -
R1224N502M L=27uH
5.100
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
Vin6.5V
Vin12V
Vin15V
0.1
1
10
100
1000
10000
Output Current Iout (mA)
2) Efficiency vs. Output Current (*Note)
R1224N182F(Vin=3.3V) CDRH127-10uH
100%
R1224N182F(Vin=5.0V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
10000
- 16 -
Output Current Iout(mA)
Output Current Iout(mA)
R1224N182G(Vin=3.3V) CDRH127-10uH
R1224N182G(Vin=5.0V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
R1224N182G(Vin=12V) CDRH127-10uH
R1224N182H(Vin=3.3V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N182H(Vin=5.0V) CDRH127-10uH
R1224N182H(Vin=12V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N182L(Vin=3.3V) CDRH127-27uH
R1224N182L(Vin=5.0V) CDRH127-27uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 17 -
R1224N182M(Vin=3.3V) CDRH127-27uH
R1224N182M(Vin=5.0V) CDRH127-27uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
10000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N182M(Vin=12V) CDRH127-27uH
R1224N332E(Vin=7.0V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N332E(Vin=4.8V) CDRH127-10uH
R1224N332F(Vin=7.0V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 18 -
R1224N332F(Vin=4.8V) CDRH127-10uH
R1224N332G(Vin=12V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N332G(Vin=4.8V) CDRH127-10uH
R1224N332G(VIN=10V)
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current IOUT(mA)
Output Current Iout(mA)
R1224N332G(Vin=15V) CDRH127-10uH
R1224N332G(VIN=16V)
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current IOUT(mA)
12345
Rev. 1.12
- 19 -
R1224N332H(Vin=12V) CDRH127-10uH
R1224N332H(Vin=4.8V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N332H(Vin=15V) CDRH127-10uH
R1224N332L(Vin=7.0V) CDRH127-27uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N332L(Vin=4.8V) CDRH127-27uH
R1224N332M(Vin=12V) CDRH127-27uH
100%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 20 -
R1224N332M(Vin=4.8V) CDRH127-27uH
R1224N332M(VIN=5V)
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100
98
96
94
92
90
88
86
84
82
80
0
1
2
3
4
5
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current IOUT(A)
R1224N332M(VIN=10V)
R1224N332M(VIN=18V)
100
98
96
94
92
90
88
86
84
82
80
100
98
96
94
92
90
88
86
84
82
80
0
1
2
3
4
0
1
2
3
4
5
Output Current IOUT(A)
Output Current IOUT(A)
R1224N332M(Vin=15V) CDRH127-27uH
R1224N502E(Vin=6.5V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 21 -
R1224N502E(Vin=10V) CDRH127-10uH
R1224N502F(Vin=6.5V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N502F(Vin=10V) CDRH127-10uH
R1224N502G(VIN=10V)
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current IOUT(mA)
Output Current Iout(mA)
R1224N502G(Vin=6.5V) CDRH127-10uH
R1224N502G(VIN=16V)
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current IOUT(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 22 -
R1224N502G(Vin=12V) CDRH127-10uH
R1224N502G(Vin=15V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N502H(Vin=6.5V) CDRH127-10uH
R1224N502H(Vin=12V) CDRH127-10uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N502H(Vin=15V) CDRH127-10uH
R1224N502L(Vin=6.5V) CDRH127-27uH
100%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 23 -
R1224N502M(Vin=6.5V) CDRH127-27uH
R1224N502L(Vin=10V) CDRH127-27uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N502M(Vin=12V) CDRH127-27uH
R1224N502M(Vin=15V) CDRH127-27uH
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
*Note: Typical characteristics 9), 10) are obtained with using the following components;
PMOS: IRF7406 (IR)
L: CDRH127-100MC (Sumida: 10µH)
C2: 0.1µF (Ceramic Type)
C3: 10SA220(Sanyo/OS-con: 220µF/10V)
R1: 10Ω
SD: RB083L-20 (Rohm)
C1: 25SC47(Sanyo/OS-con: 47µF/25V)×2
3) Ripple Voltage vs. Output Current
R1224N182E
L=10uH
R1224N182F
L=10uH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
Vin3.3V
Vin5V
Vin3.3V
Vin5V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 24 -
R1224N182H
L=10uH
R1224N182G
L=10uH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
Vin3.3V
Vin5V
Vin3.3V
Vin5V
Vin12V
Vin12V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N182L
L=27uH
R1224N182M
L=27uH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
Vin3.3V
Vin5V
Vin3.3V
Vin5V
Vin12V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N332E
L=10uH
R1224N332F
L=10uH
70
70
60
50
40
30
20
10
0
60
50
40
30
20
10
0
Vin4.8V
Vin7V
Vin4.8V
Vin7V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 25 -
R1224N332G L=10uH
R1224N332H L=10uH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
Vin4.8V
Vin12V
Vin15V
Vin4.8V
Vin12V
Vin15V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N332L
L=27uH
R1224N332M
L=27uH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
Vin4.8V
Vin12V
Vin15V
Vin4.8V
Vin7V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N502E L=10uH
R1224N502F
L=10uH
70
70
60
50
40
30
20
10
0
Vin6.5V
Vin10V
60
50
40
30
20
10
0
Vin6.5V
Vin10V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
12345
Rev. 1.12
- 26 -
R1224N502G L=10uH
R1224N502H
L=10uH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
Vin6.5V
Vin12V
Vin15V
Vin6.5V
Vin12V
Vin15V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
R1224N502L
L=27uH
R1224N502M
L=27uH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
Vin6.5V
Vin12V
Vin15V
Vin6.5V
Vin10V
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current Iout(mA)
Output Current Iout(mA)
4) Output Voltage vs. Input Voltage
R1224N182E L=10uH
2.00
R1224N182F L=10uH
2.00
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
1.95
1.90
1.85
1.80
1.75
1mA
1.70
1.65
1.60
1mA
500mA
500mA
0
5
10
Input Voltage Vin(V)
15
20
0
5
10
15
20
Input Voltage Vin(V)
12345
Rev. 1.12
- 27 -
R1224N182G
L=10uH
R1224N182H
L=10uH
2.00
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
2.00
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
-1mA
-500mA
-1mA
-500mA
0
5
10
Input Voltage Vin(V)
15
20
0
5
10
15
20
Input Voltage Vin(V)
R1224N182L L=27uH
R1224N182M
L=27uH
2.00
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
2.00
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
1mA
1mA
500mA
500mA
0
5
10
15
20
0
5
10
15
20
Input Voltage Vin(V)
Input Voltage Vin(V)
R1224N332E L=10uH
R1224N332F
L=10uH
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
1mA
1mA
500mA
500mA
0
5
10
15
20
0
5
10
Input Voltage Vin(V)
15
20
Input Voltage Vin(V)
12345
Rev. 1.12
- 28 -
R1224N332H L=10uH
R1224N332G
L=10uH
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
-1mA
-1mA
-500mA
-500mA
0
5
10
Input Voltage Vin(V)
15
20
0
5
10
15
20
Input Voltage Vin(V)
R1224N332L
L=27uH
R1224N332M L=27uH
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
1mA
1mA
500mA
500mA
0
5
10
15
20
0
5
10
15
20
Input Voltage Vin(V)
Input Voltage Vin(V)
R1224N502E
L=10uH
R1224N502F L=10uH
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
1mA
1mA
500mA
500mA
0
5
10
Input Voltage Vin(V)
15
20
0
5
10
15
20
Input Voltage Vin(V)
12345
Rev. 1.12
- 29 -
R1224N502H L=10uH
R1224N502G
L=10uH
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
-1mA
-500mA
-1mA
-500mA
0
5
10
Input Voltage Vin(V)
15
20
0
5
10
15
20
Input Voltage Vin(V)
R1224N502L
L=27uH
R1224N502M
L=27uH
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
1mA
1mA
500mA
500mA
0
5
10
15
20
0
5
10
15
20
Input Voltage Vin(V)
Input Voltage Vin(V)
5) Output Voltage vs. Temperature
R1224N332E
3.33
R1224N122F
1.210
1.205
1.200
1.195
1.190
3.32
3.31
3.30
3.29
3.28
3.27
-40
10
60
-40
10
60
(°C)
(°C)
Temperature Topt
Temperature Topt
12345
Rev. 1.12
- 30 -
R1224N602L
R1224N102G
6.10
6.05
6.00
5.95
5.90
1.010
1.005
1.000
0.995
0.990
-40
10
60
-40
10
60
Temperature Topt
(°C)
(°C)
Temperature Topt
6) Oscillator Frequency vs. Temperature
R1224N102G
360
R1224N102H
600
550
500
450
400
330
300
270
240
-40
10
60
-40
10
60
(°C)
(°C)
Temperature Topt
Temperature Topt
R1224N102M
216
198
180
162
144
-40
-20
0
20
40
60
80
(°C)
Temperature Topt
12345
Rev. 1.12
- 31 -
7) Supply Current vs. Temperature
R1224N602L
R1224N332E
25
25
20
15
10
5
20
15
10
5
0
0
-40
10
60
(°C)
-40
10
60
Temperature Topt
(°C)
Temperature Topt
R1224N602F
R1224N102G
25
20
15
10
5
40
30
20
10
0
0
-40
10
60
-40
10
60
(°C)
(°C)
Temperature Topt
Temperature Topt
R1224N102H
R1224N102M
60
40
50
40
30
20
10
0
30
20
10
0
-40
10
60
-40
10
60
(°C)
(°C)
Temperature Topt
Temperature Topt
12345
Rev. 1.12
- 32 -
8) Soft-start time vs. Temperature
R1224N102G
15
10
5
-40
-20
0
20
40
(°C)
60
80
Temperature Topt
9) Delay Time for Protection vs. Temperature
R1224N332E
30
25
20
15
10
-40
-20
0
20
40
60
80
(°C)
Temperature Topt
10) EXT "H" Output Current vs. Temperature
R1224N332E
-10
-15
-20
-25
-40
-20
0
20
40
(°C)
60
80
Temperature Topt
12345
Rev. 1.12
- 33 -
11) EXT"L" Output Current vs. Temperature
R1224N332E
50
40
30
20
-40
-20
0
20
40
60
80
(°C)
Temperature Topt
12) Load Transient Response
R1224N332G
L=10uH Vin=4.8V
R1224N332G
L=10uH Vin=4.8V
3.50
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
2.50
2000
1800
1600
1400
1200
1000
800
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2000
1800
1600
1400
1200
1000
800
600
400
200
0
600
400
200
0
-0
-0
0
1E- 2E- 3E- 4E-
-0.04 -0.02
0
0.02 0.04 0.06 0.08
04
04
04
04
Time(sec)
Time(sec)
R1224N332G
L=10uH Vin=10V
R1224N332G L=10uH Vin=10V
3.50
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
2.50
2000
1800
1600
1400
1200
1000
800
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2000
1800
1600
1400
1200
1000
800
600
600
400
400
200
200
0
0
-0.00 -0.00 0.000 0.000 0.000 0.000 0.000
02
01
0
1
2
3
4
-0.04 -0.02
0
0.02 0.04 0.06 0.08
Time(sec)
Time(sec)
12345
Rev. 1.12
- 34 -
R1224N332H
L=10uH Vin=4.8V
R1224N332H
L=10uH Vin=4.8V
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2000
1800
1600
1400
1200
1000
800
3.50
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
2.50
2000
1800
1600
1400
1200
1000
800
600
600
400
400
200
200
0
0
-2E-04 -1E-04
0
1E-04 2E-04 3E-04 4E-04
-0.04 -0.02
0
0.02 0.04 0.06 0.08
Time(sec)
Time(sec)
R1224N332H
L=10uH Vin=10V
R1224N332H
L=10uH Vin=10V
3.50
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
2.50
2000
3.50
2000
1800
1600
1400
1200
1000
800
1800
1600
1400
1200
1000
800
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
2.50
600
600
400
400
200
200
0
0
-2E- -1E-
04 04
0
1E-04 2E-04 3E-04 4E-04
Time(sec)
-2E-04 -1E-04
0
0.000 0.000 0.000 0.000
Time(sec)
1
2
3
4
R1224N332M
L=27uH Vin=4.8V
R1224N332M
L=27uH Vin=4.8V
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2000
1800
1600
1400
1200
1000
800
3.50
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
2.50
2000
1800
1600
1400
1200
1000
800
600
600
400
400
200
200
0
0
-2E-04 -1E-04
0
0.000 0.000 0.000 0.000
Time(sec)
-0.04 -0.02
0
0.02 0.04
Time(sec)
0.06 0.08
1
2
3
4
12345
Rev. 1.12
- 35 -
R1224N332M
L=27uH Vin=10V
R1224N332M
L=27uH Vin=10V
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2000
1800
1600
1400
1200
1000
800
3.50
3.40
3.30
3.20
3.10
3.00
2.90
2.80
2.70
2.60
2.50
2000
1800
1600
1400
1200
1000
800
600
400
600
200
400
0
200
-2E- -1E-
04 04
0
1E-04 2E-04 3E-04 4E-04
Time(sec)
0
-0.04 -0.02
0
0.02 0.04 0.06 0.08
Time(sec)
13) UVLO Voltage vs. Temperature
R1224N332E
2.20
2.15
2.10
2.05
2.00
1.95
1.90
-40
-20
0
20
40
60
80
(°C)
Temperature Topt
12345
Rev. 1.12
- 36 -
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