R1224N402G-TR [RICOH]
Switching Controller, 0.05A, 360kHz Switching Freq-Max, CMOS, PDSO5, SOT-23, 5 PIN;
| 型号： | R1224N402G-TR |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Switching Controller, 0.05A, 360kHz Switching Freq-Max, CMOS, PDSO5, SOT-23, 5 PIN 开关 光电二极管 |
| 文件： | 总42页 (文件大小：870K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
R1224N SERIES
PWM/VFM step-down DC/DC Converter
NO.EA-096-061102
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
• Supply Current................................................................Typ. 20µA (R1224Nxx2E/F/M/L, R1224N102M)
Typ. 30µA (R1224Nxx2G, R1224N102G)
Typ. 40µA (R1224Nxx2H, R1224N102H)
• Standby Current..............................................................Typ. 0µA
• Input Voltage Range .......................................................2.3V~18.5V
• Output Voltage Range.....................................................1.2V to 6.0V (R1224Nxx2x)
1.0V to VIN (R1224N102x)
• Output Voltage Accuracy.................................................±2.0%
• Oscillator Frequency.......................................................Typ. 180kHz (R1224Nxx2M, R1224N102M)
Typ. 300kHz (R1224Nxx2E/G, R1224N102G)
Typ. 500kHz (R1224Nxx2F/H, R1224N102H)
• Efficiency.........................................................................Typ. 90%
• Low Temperature-Drift Coefficient of Output Voltage......Typ. ±100ppm/°C
• Package .......................................................................... SOT-23-5
• Built-in Soft-start Function............................................... Typ. 10ms
• Built-in Current Limit Circuit
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.
1
R1224N
BLOCK DIAGRAM
*Fixed Output Voltage Type
OSC
VIN
5
VOUT
3
1
EXT
4
Amp
Vref
PWM/VFM
CONTROL
Soft Start
Chip Enable
CE
Protection
Vref
UVLO
2
GND
*Adjustable Output Voltage Type
OSC
VIN
5
VFB
3
1
EXT
4
Amp
Vref
Soft Start
CE
Chip Enable
Protection
Vref
UVLO
2
GND
2
R1224N
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-xx-x←Part Number
↑ ↑ ↑ ↑ ↑
↑
a b c d e
f
Code
Contents
Designation of Package Type;
N: SOT-23-5
a
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.
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
d
Designation of Taping Type;
(Refer to Taping Specification)"TR" is prescribed as a standard.
e
f
Designation of Composition of pin plating
-F: Lead free plating
3
R1224N
PIN CONFIGURATIO
• SOT-23-5
5
4
(mark side)
1
2
3
PIN DESCRIPTION
Pin No
Symbol
Pin Description
1
2
3
4
5
CE
GND
Chip Enable Pin (“H” Active)
Ground Pin
VOUT (VFB)
EXT
Pin for Monitoring Output Voltage (Feedback Voltage)
External Transistor Drive Pin (CMOS Output)
Power Supply Pin
VIN
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
20
Unit
V
VIN
VIN Supply Voltage
VEXT
VCE
EXT Pin Output Voltage
V
−0.3 to VIN+0.3
−0.3 to VIN+0.3
−0.3 to VIN+0.3
± 50
CE Pin Input Voltage
V
VOUT
IEXT
VOUT/VFB Pin Input Voltage
EXT Pin Inductor Drive Output Current
Power Dissipation (SOT-23-5)*
Operating Temperature Range
Storage Temperature Range
V
A
PD
420
mW
°C
°C
Topt
Tstg
−40 to +85
−55 to +125
* ) For Power Dissipation, please refer to PACKAGE INFORMATION to be described.
4
R1224N
ELECTRICAL CHARACTERISTICS
• R1224Nxx2X (X=E/F/G/H/L/M) except R1224N102X
Topt=25°C
Symbol
Item
Conditions
Min.
Typ.
Max. Unit
VIN
Operating Input Voltage
2.3
18.5
V
V
VSET
×0.98
VSET
×1.02
VIN=VCE=VSET+1.5V, IOUT=−100mA
VOUT
Step-down Output Voltage
VSET
When VSET 1.5V, VIN=VCE=3.0V
=
∆VOUT/
∆Topt
Step-down Output Voltage
Temperature Coefficient
ppm/°C
−40°C Topt 85°C
±100
=
=
VIN=VCE=VSET+1.5V, IOUT=−100mA
When VSET 1.5, VIN=VCE=3.0V
=
fosc
Oscillator Frequency
144
240
400
180
300
500
216
360
600
kHz
L/M Version
E/G Version
F/H Version
∆fosc/
∆Topt
Oscillator Frequency
Temperature Coefficient
%/°C
−40°C Topt 85°C
±0.2
=
=
VIN=VCE=VOUT=18.5V
E/F/L/M Version
G version
20
30
40
50
60
80
IDD1
Supply Current 1
µA
H version
Istandby Standby Current
0.0
0.5
VIN=18.5V, VCE=0V, VOUT=0V
µA
VIN=8V, VEXT=7.9V, VOUT=8V,
VCE=8V
IEXTH
IEXTL
EXT “H” Output Current
mA
−17
−10
VIN=8V, VEXT=0.1V, VOUT=0V,
VCE=8V
EXT “L” Output Current
20
30
mA
ICEH
ICEL
CE “H” Input Current
CE “L” Input Current
CE “H” Input Voltage
CE “L” Input Voltage
0.0
0.0
0.5
0.3
VIN=VCE=VOUT=18.5V
VIN=VOUT=18.5V, VCE=0V
VIN=8V, VOUT=0V
µA
µA
V
−0.5
VCEH
VCEL
1.5
V
VIN=8V, VOUT=0V
Oscillator Maximum
Duty Cycle
Maxdty
100
1.8
%
VFMdty VFM Duty Cycle
E/F/L Version
35
%
V
VUVLO1
UVLO Voltage
2.0
2.2
2.3
VIN=VCE=2.5V to 1.5V, VOUT=0V
VUVLO1
+0.1
VUVLO2
UVLO Release Voltage
V
VIN=VCE=1.5V to 2.5V, VOUT=0V
VIN=VSET+1.5V, IOUT=−10mA
VCE=0V→VSET+1.5V
tstart
tprot
Delay Time by Soft-Start function
Delay Time for protection circuit
5
5
10
15
20
30
ms
ms
VIN=VCE=VSET+1.5V
VOUT=VSET+1.5V→0V
5
R1224N
• R1224N102X (X=G/H/M)
Topt=25°C
Symbol
VIN
Item
Operating Input Voltage
Feedback Voltage
Conditions
Min.
2.3
Typ.
Max. Unit
18.5
1.02
V
V
VFB
0.98
1.00
VIN=VCE=3.5V, IFB=−100mA
∆VFB/
∆Topt
Feedback Voltage
Temperature Coefficient
ppm/°C
−40°C Topt 85°C
±100
=
=
VIN=VCE=3.5V, IFB=−100mA
M Version
G Version
144
240
400
180
300
500
216
360
600
fosc
Oscillator Frequency
kHz
H Version
∆fosc/
∆Topt
Oscillator Frequency
Temperature Coefficient
%/°C
µA
−40°C Topt 85°C
±0.2
=
=
VIN=VCE=VFB=18.5V
M Version
G Version
20
30
40
50
60
80
IDD1
Supply Current 1
H Version
Istandby Standby Current
0.0
0.5
VIN=18.5V, VCE=0V, VFB=0V
µA
VIN=8V, VEXT=7.9V, VFB=8V,
VCE=8V
IEXTH
IEXTL
EXT “H” Output Current
mA
−17
−10
VIN=8V, VEXT=0.1V, VFB=0V,
VCE=8V
EXT “L” Output Current
20
30
mA
ICEH
ICEL
CE “H” Input Current
CE “L” Input Current
CE “H” Input Voltage
CE “L” Input Voltage
Oscillator Maximum Duty Cycle
UVLO Voltage
0.0
0.0
0.5
0.3
VIN=VCE=VFB=18.5V
VIN=VFB=18.5V, VCE=0V
VIN=8V, VFB=0V
µA
µA
V
−0.5
VCEH
1.5
VCEL
V
VIN=8V, VFB=0V
Maxdty
VUVLO1
100
1.8
%
V
2.0
2.2
2.3
VIN=VCE=2.5V to 1.5V, VFB=0V
VIN=VCE=1.5V to 2.5V, VFB=0V
VUVLO1
+0.1
VUVLO2
tstart
tprot
UVLO Release Voltage
V
VIN=2.5V, IFB=−10mA
VCE=0V→2.5V
Delay Time by Soft-Start function
Delay Time for protection circuit
5
5
10
15
20
30
ms
ms
VIN=VCE=2.5V
VFB=2.5V→0V
6
R1224N
TYPICAL APPLICATION AND APPLICATION HINTS
(1) Fixed Output Voltage Type (R1224Nxx2E/F/G/H/L/M except xx=10)
L
PMOS
C1
4
EXT
R1
IN
OUT
V
V
5
1
3
R1224N
C3
CE
SD
GND
2
C2
LOAD
CE CONTROL
PMOS: HAT1044M (Hitachi)
SD1 : RB063L-30 (Rohm)
L
: CR105-270MC (Sumida, 27µH)
C3 : 47µF (Tantalum Type)
C2 : 0.1µF (Ceramic Type)
C1
R1
: 10µF (Ceramic Type)
: 10Ω
(2) Adjustable Output Type (R1224N102G/H/M) Example: Output Voltage=3.2V
L
PMOS
C4
C1
R4
4
EXT
R1
R3
IN
FB
V
V
5
1
3
R1224N
C3
CE
SD
GND
2
R2
C2
LOAD
CE CONTROL
PMOS: HAT1044M (Hitachi)
SD1 : RB063L-30 (Rohm)
L : CR105-270MC (Sumida, 27µH)
C3 : 47µF (Tantalum Type)
C1
R1
: 10µF (Ceramic Type)
: 10Ω, R2=22kΩ, R3=2.7kΩ, R4=33kΩ
C2 : 0.1µF (Ceramic Type) C4: 1000pF (Ceramic Type)
7
R1224N
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 R1224N 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 are the typical characteristics of the IC with PWM/VFM alternative circuit.
ÌThe 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.
8
R1224N
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
4
EXT
R1
R3
IN
FB
V
V
5
1
3
R1224N
C3
CE
SD
GND
2
R2
C2
LOAD
CE CONTROL
9
R1224N
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
IL
ILmax
OUT
I
IN
OUT
V
V
L
Lx Tr
ILmin
topen
i2
SD
CL
ton
toff
GND
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.
10
R1224N
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.)
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.
Ì The above explanation is directed to the calculation in an ideal case in continuous mode.
11
R1224N
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.
12
R1224N
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.
13
R1224N
TEST CIRCUITS
Output Voltage, Oscillator Frequency, CE “H” Input Voltage, CE “L” Input Voltage, Soft-start time
L1
PMOS
4
EXT
Oscilloscope
IN
V
5
1
D1
C1
2
3
R1224N
GND
C2
OUT
(VFB)
V
CE
V
Supply Current 1
Standby Current
IN
A
IN
A
V
V
5
1
5
1
2
3
2
3
R1224N
CE
R1224N
CE
GND
GND
OUT
V
OUT
V
(VFB)
(VFB)
EXT “H” Output Current
EXT “L” Output Current
IN
IN
EXT
V
EXT
V
4
2
3
5
1
4
2
3
5
1
R1224N
R1224N
GND
GND
A
A
OUT
(VFB)
OUT
(VFB)
V
V
CE
CE
CE “H” Input Current, CE “L” Input Current
Output Delay Time for Protection Circuit
IN
IN
V
EXT
V
5
1
4
2
3
5
1
Oscilloscope
2
3
R1224N
R1224N
GND
GND
OUT
V
OUT
(VFB)
V
A
CE
CE
C2
(VFB)
PMOS: HAT1044M (Hitachi)
SD1 : RB491D (Rohm)
L : CD104-270MC (Sumida, 27µH)
C2: 47µF (Tantalum Type)
C1
: 47µF (Tantalum Type)
14
R1224N
TYPICAL CHARACTERISTICS
1)Output Voltage vs. Output Current (*Note)
R1224N182E L=10µH
R1224N182F L=10µH
1.850
1.850
1.830
1.830
1.810
1.790
1.810
1.790
1.770
1.750
V
IN3.3V
IN5V
V
IN3.3V
IN5V
1.770
V
V
1.750
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current IOUT(mA)
R1224N182G L=10µH
R1224N182H L=10µH
1.850
1.830
1.810
1.790
1.770
1.750
1.850
1.830
1.810
1.790
1.770
1.750
V
V
V
IN3.3V
V
V
V
IN3.3V
IN5V
IN5V
IN12V
IN12V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N182L L=27µH
R1224N182M L=27µH
1.850
1.830
1.810
1.790
1.770
1.750
1.850
1.830
1.810
1.790
1.770
1.750
V
V
V
IN3.3V
V
IN3.3V
IN5V
IN5V
V
IN12V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(mA)
15
R1224N
R1224N332E L=10µH
R1224N332F L=10µH
3.40
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
V
IN4.8V
IN7V
V
IN4.8V
IN7V
V
V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332G L=10µH
R1224N332G (VIN=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 lOUT(mA)
Output Current lOUT(mA)
R1224N332G (VIN=16V)
R1224N332H L=10µH
3.35
3.34
3.33
3.32
3.31
3.30
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
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(mA)
16
R1224N
R1224N332L L=27µH
R1224N332M L=27µH
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
V
V
V
IN4.8V
IN12V
IN15V
V
IN4.8V
IN7V
V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(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
1
2
3
4
5
0
Output Current lOUT(A)
Output Current lOUT(A)
R1224N332M (VIN=18V)
R1224N502E L=10µH
5.100
3.35
3.34
3.33
3.32
3.31
3.30
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
V
IN6.5V
IN10V
V
0.1
1
10
100
1000
0
1
2
3
4
10000
Output Current lOUT(A)
Output Current lOUT(mA)
17
R1224N
R1224N502F L=10µH
R1224N502G L=10µH
5.100
5.100
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
VIN6.5V
VIN12V
VIN15V
V
IN6.5V
IN10V
V
0.1
0.1
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(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
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502H L=10µH
R1224N502L L=27µH
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
V
IN6.5V
IN10V
V
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(mA)
18
R1224N
R1224N502M L=27µH
5.100
5.080
5.060
5.040
5.020
5.000
4.980
4.960
4.940
4.920
4.900
*Note: Typical characteristics 1) are obtained with using
the following components;
PMOS: IRF7406 (IR)
V
V
V
IN6.5V
IN12V
IN15V
L
: CDRH127-100MC (Sumida: 10µH)
SD
C1
C2
C3
R1
: RB083L-20 (Rohm)
: 25SC47 (Sanyo/OS-con: 47µF/25V)×2
: 0.1µF (Ceramic Type)
: 10SA220 (Sanyo/OS-con: 220µF/10V)
: 10Ω
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
2) Efficiency vs. Output Current (*Note)
R1224N182F (VIN=3.3V)
CDRH127-10µH
R1224N182F (VIN=5.0V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N182G (VIN=3.3V) CDRH127-10µH
R1224N182G (VIN=5.0V) CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
19
R1224N
R1224N182G (VIN=12V)
CDRH127-10µH
R1224N182H (VIN=3.3V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N182H (VIN=5.0V) CDRH127-10µH
R1224N182H (VIN=12V) CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N182L (VIN=3.3V)
CDRH127-27µH
R1224N182L (VIN=5.0V)
CDRH127-27µH
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 lOUT(mA)
Output Current lOUT(mA)
20
R1224N
R1224N182M (VIN=3.3V)
CDRH127-27µH
R1224N182M (VIN=5.0V)
CDRH127-27µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N182M (VIN=12V) CDRH127-27µH
R1224N332E (VIN=7.0V) CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N332E (VIN=4.8V)
CDRH127-10µH
R1224N332F (VIN=7.0V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
21
R1224N
R1224N332F (VIN=4.8V)
CDRH127-10µH
R1224N332G (VIN=12V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N332G (VIN=4.8V) CDRH127-10µH
R1224N332G (VIN=10V)
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 lOUT(mA)
Output Current lOUT(mA)
R1224N332G (VIN=16V)
R1224N332G (VIN=15V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
22
R1224N
R1224N332H (VIN=12V)
CDRH127-10µH
R1224N332H (VIN=4.8V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N332H (VIN=15V) CDRH127-10µH
R1224N332L (VIN=7.0V) CDRH127-27µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N332L (VIN=4.8V)
CDRH127-27µH
R1224N332M (VIN=12V)
CDRH127-27µH
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 lOUT(mA)
Output Current lOUT(mA)
23
R1224N
R1224N332M (VIN=4.8V)
CDRH127-27µH
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
1
10
100
1000 10000
0
1
2
3
4
5
Output Current lOUT(mA)
Output Current lOUT(A)
R1224N332M (VIN=10V)
R1224N332M (VIN=18V)
100
100
98
96
94
92
90
88
86
84
82
80
98
96
94
92
90
88
86
84
82
80
0
1
2
3
4
5
0
1
2
3
4
Output Current lOUT(A)
Output Current lOUT(A)
R1224N332M (VIN=15V)
CDRH127-27µH
R1224N502E (VIN=6.5V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
24
R1224N
R1224N502E (VIN=10V)
CDRH127-10µH
R1224N502F (VIN=6.5V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N502F (VIN=10V) CDRH127-10µH
R1224N502G (VIN=10V)
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 lOUT(mA)
Output Current lOUT(mA)
R1224N502G (VIN=16V)
R1224N502G (VIN=6.5V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
25
R1224N
R1224N502G (VIN=12V)
CDRH127-10µH
R1224N502G (VIN=15V)
CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N502H (VIN=6.5V) CDRH127-10µH
R1224N502H (VIN=12V) CDRH127-10µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N502H (VIN=15V)
CDRH127-10µH
R1224N502L (VIN=6.5V)
CDRH127-27µH
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 lOUT(mA)
Output Current lOUT(mA)
26
R1224N
R1224N502L (VIN=10V)
CDRH127-27µH
R1224N502M (VIN=6.5V)
CDRH127-27µH
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 lOUT(mA)
Output Current lOUT(mA)
R1224N502M (VIN=12V) CDRH127-27µH
R1224N502M (VIN=15V) CDRH127-27µH
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 lOUT(mA)
Output Current lOUT(mA)
*Note: Typical characteristics 2) are obtained with using the following components;
PMOS: IRF7406 (IR)
L
SD
C1
: CDRH127-100MC (Sumida: 10µH)
: RB083L-20 (Rohm)
: 25SC47 (Sanyo/OS-con: 47µF/25V)×2
C2 : 0.1µF (Ceramic Type)
C3 : 10SA220 (Sanyo/OS-con: 220µF/10V)
R1 : 10Ω
27
R1224N
3) Ripple Voltage vs. Output Current
R1224N182E L=10µH
R1224N182F L=10µH
70
70
60
50
40
30
20
10
0
60
V
IN3.3V
IN5V
V
IN3.3V
IN5V
50
40
30
20
10
0
V
V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1224N182G L=10µH
R1224N182H L=10µH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
V
V
V
IN3.3V
V
V
V
IN3.3V
IN5V
IN5V
IN12V
IN12V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1224N182L L=27µH
R1224N182M L=27µH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
V
V
V
IN3.3V
V
IN3.3V
IN5V
IN5V
V
IN12V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
28
R1224N
R1224N332E L=10µH
R1224N332F L=10µH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
V
IN4.8V
IN7V
V
IN4.8V
IN7V
V
V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1224N332G L=10µH
R1224N332H L=10µH
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
100
1000 10000
0.1
1
10
100
1000 10000
1
10
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332L L=27µH
R1224N332M L=27µH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
VIN4.8V
VIN12V
VIN15V
V
IN4.8V
IN7V
V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(mA)
29
R1224N
R1224N502E L=10µH
R1224N502F L=10µH
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
V
IN6.5V
IN10V
V
IN6.5V
IN10V
V
V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502G L=10µH
R1224N502H L=10µH
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=27µH
R1224N502M L=27µH
70
70
60
50
40
30
20
10
0
60
50
40
30
20
10
0
V
V
V
IN6.5V
IN12V
IN15V
V
IN6.5V
IN10V
V
0.1
1
10
100
1000 10000
0.1
1
10
100
1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
30
R1224N
4) Output Voltage vs. Input Voltage
R1224N182E L=10µH
R1224N182F L=10µH
2.00
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
1.70
1mA
1mA
500mA
500mA
1.65
1.60
0
0
0
5
10
15
20
20
20
0
0
0
5
10
15
20
20
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N182G L=10µH
R1224N182H L=10µH
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
5
10
15
5
10
15
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N182L L=27µH
R1224N182M L=27µH
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
5
10
15
5
10
15
Input Voltage VIN(V)
Input Voltage VIN(V)
31
R1224N
R1224N332E L=10µH
R1224N332F L=10µH
3.40
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
1mA
500mA
1mA
500mA
0
0
0
5
10
15
20
20
20
0
0
0
5
10
15
20
20
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N332G L=10µH
R1224N332H L=10µH
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
-500mA
-1mA
-500mA
5
10
15
5
10
15
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N332L L=27µH
R1224N332M L=27µH
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
500mA
1mA
500mA
5
10
15
5
10
15
Input Voltage VIN(V)
Input Voltage VIN(V)
32
R1224N
R1224N502E L=10µH
R1224N502F L=10µH
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
0
0
5
10
15
20
20
20
0
0
0
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N502G L=10µH
R1224N502H L=10µH
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
5
10
15
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N502L L=27µH
R1224N502M L=27µH
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
5
10
15
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
33
R1224N
5) Output Voltage vs. Temperature
R1224N332E
R1224N122F
3.33
1.210
1.205
1.200
1.195
1.190
3.32
3.31
3.30
3.29
3.28
3.27
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature Topt(˚C)
Temperature Topt(˚C)
R1224N602L
R1224N102G
6.10
1.010
1.005
1.000
0.995
0.990
6.05
6.00
5.95
5.90
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature Topt(˚C)
Temperature Topt(˚C)
6) Oscillator Frequency vs. Temperature
R1224N102G
R1224N102H
360
600
550
500
450
400
330
300
270
240
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature Topt(˚C)
Temperature Topt(˚C)
34
R1224N
R1224N102M
216
198
180
162
144
-40
-15
10
35
60
85
Temperature Topt(˚C)
7) Supply Current vs. Temperature
R1224N332E
R1224N602L
25
25
20
15
10
5
20
15
10
5
0
-40
0
-40
-15
10
35
60
85
-15
10
35
60
85
Temperature Topt(˚C)
Temperature Topt(˚C)
R1224N602F
R1224N102G
25
40
30
20
10
0
20
15
10
5
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature Topt(˚C)
Temperature Topt(˚C)
35
R1224N
R1224N102H
R1224N102M
60
50
40
30
20
10
0
40
30
20
10
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
Temperature Topt(˚C)
Temperature Topt(˚C)
8) Soft-start time vs. Temperature
R1224N102G
15
10
5
-40
-15
10
35
60
85
Temperature Topt(˚C)
9) Delay Time for Protection vs. Temperature
R1224N332E
30
25
20
15
10
-40
-15
10
35
60
85
Temperature Topt(˚C)
36
R1224N
10) EXT “H” Output Current vs. Temperature
R1224N332E
-10
-15
-20
-25
-40
-15
10
35
60
85
Temperature Topt(˚C)
11) EXT “L” Output Current vs. Temperature
R1224N332E
50
40
30
20
-40
-15
10
35
60
85
Temperature Topt(˚C)
12) Load Transient Response
R1224N332G
L=10µH VIN=4.8V
R1224N332G
L=10µH 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
600
400
400
200
200
0
0
-0
-0
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)
37
R1224N
R1224N332G
L=10µH VIN=10V
R1224N332G
L=10µH 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
-0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004
-0.04 -0.02
0
0.02 0.04 0.06 0.08
Time(sec)
Time(sec)
R1224N332H
L=10µH VIN=4.8V
R1224N332H
L=10µH 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
-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=10µH VIN=10V
R1224N332H
L=10µH 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
3.40
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
-2E-04 -1E-04
0
0.0001 0.0002 0.0003 0.0004
Time(sec)
Time(sec)
38
R1224N
R1224N332M
L=27µH VIN=4.8V
R1224N332M
L=27µH 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
600
400
400
200
200
0
0
-2E-04 -1E-04
0
0.0001 0.0002 0.0003 0.0004
-0.04 -0.02
0
0.02 0.04 0.06 0.08
Time(sec)
Time(sec)
R1224N332M
L=27µH VIN=10V
R1224N332M
L=27µH 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
400
200
0
600
400
200
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)
12) UVLO Voltage vs. Temperature
R1224N332E
2.20
2.15
2.10
2.05
2.00
1.95
1.90
-40
-15
10
35
60
85
Temperature Topt(˚C)
39
PE-SOT-23-5-071228
PACKAGE INFORMATION
• SOT-23-5 (SC-74A)
Unit: mm
PACKAGE DIMENSIONS
2.9±0.2
+0.2
−0.1
1.1
1.9±0.2
(0.95)
(0.95)
0.8±0.1
5
4
0 to 0.1
1
2
3
+0.1
−0.05
0.15
0.4±0.1
TAPING SPECIFICATION
4.0–0.1
+0.1
0
φ1.5
2.0–0.05
0.3–0.1
3.3
4.0–0.1
2.0Max.
1.1±0.1
TR
User Direction of Feed
TAPING REEL DIMENSIONS REUSE REEL (EIAJ-RRM-08Bc)
(1reel=3000pcs)
11.4±1.0
9.0±0.3
2±0.5
21±0.8
PE-SOT-23-5-071228
PACKAGE INFORMATION
POWER DISSIPATION (SOT-23-5)
This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board.
This specification is based on the measurement at the condition below:
(Power Dissipation (SOT-23-5) is substitution of SOT-23-6.)
Measurement Conditions
Standard Land Pattern
Environment
Board Material
Board Dimensions
Copper Ratio
Mounting on Board (Wind velocity=0m/s)
Glass cloth epoxy plastic (Double sided)
40mm × 40mm × 1.6mm
Top side : Approx. 50% , Back side : Approx. 50%
φ0.5mm × 44pcs
Through-hole
Measurement Result
(Topt=25°C, Tjmax=125°C)
Free Air
Standard Land Pattern
420mW
Power Dissipation
250mW
Thermal Resistance
θja=(125−25°C)/0.42W=238°C/W
400°C/W
600
40
500
400
300
200
100
0
On Board
420
250
Free Air
0
25
50
75 85 100
125
150
Ambient Temperature (°C)
Power Dissipation
Measurement Board Pattern
IC Mount Area Unit : mm
RECOMMENDED LAND PATTERN
0.7 MAX.
1.0
2.4
0.95
1.9
0.95
(Unit: mm)
ME-R1224N-0612
MARK INFORMATION
R1224N SERIES MARK SPECIFICATION
• SOT-23-5 (SC-74A)
1
4
2
5
3
,
,
,
: Product Code (refer to Part Number vs. Product Code)
: Lot Number
1
2
3
4
5
• Part Number vs. Product Code
Product Code
Product Code
Product Code
Part Number
Part Number
Part Number
1
2
3
1
2
3
1
2
3
R1224N102G
R1224N122G
R1224N152G
R1224N182G
R1224N252G
R1224N302G
R1224N332G
R1224N362G
R1224N402G
R1224N502G
R1224N552G
R1224N602G
R1224N122E
R1224N152E
R1224N182E
R1224N222E
R1224N252E
R1224N262E
R1224N272E
R1224N302E
R1224N332E
R1224N502E
R1224N552E
R1224N602E
G
G
G
G
G
G
G
G
G
G
G
G
E
E
E
E
E
E
E
E
E
E
E
E
1
1
1
1
2
3
3
3
4
5
5
6
1
1
1
2
2
2
2
3
3
5
5
6
0
2
5
8
5
0
3
6
0
0
5
0
2
5
8
2
5
6
7
0
3
0
5
0
R1224N102H
R1224N122H
R1224N132H
R1224N152H
R1224N182H
R1224N252H
R1224N302H
R1224N332H
R1224N362H
R1224N402H
R1224N462H
R1224N472H
R1224N502H
R1224N552H
R1224N602H
R1224N122F
R1224N152F
R1224N182F
R1224N252F
R1224N262F
R1224N302F
R1224N322F
R1224N332F
R1224N362F
R1224N502F
R1224N552F
R1224N602F
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
F
F
F
F
F
F
F
F
F
F
F
F
1
1
1
1
1
2
3
3
3
4
4
4
5
5
6
1
1
1
2
2
3
3
3
3
5
5
6
0
2
3
5
8
5
0
3
6
0
6
7
0
5
0
2
5
8
5
6
0
2
3
6
0
5
0
R1224N102M
R1224N122M
R1224N152M
R1224N182M
R1224N252M
R1224N302M
R1224N312M
R1224N332M
R1224N502M
R1224N552M
R1224N602M
R1224N122 L
R1224N152 L
R1224N182 L
R1224N252 L
R1224N302 L
R1224N312 L
R1224N332 L
R1224N502 L
R1224N552 L
R1224N602 L
M
M
M
M
M
M
M
M
M
M
M
L
L
L
L
L
L
L
L
L
1
1
1
1
2
3
3
3
5
5
6
1
1
1
2
3
3
3
5
5
6
0
2
5
8
5
0
1
3
0
5
0
2
5
8
5
0
1
3
0
5
0
L
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