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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. 20A (R1224Nxx2E/F/M/L, R1224N102M) Typ. 30A (R1224Nxx2G, R1224N102G) Typ. 40A (R1224Nxx2H, R1224N102H) * Standby Current .............................................................. Typ. 0A * 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
VIN
5
OSC
3
VOUT
EXT
4
PWM/VFM CONTROL
Amp Vref Soft Start Protection UVLO Chip Enable Vref
1
CE
2
GND
*Adjustable Output Voltage Type
VIN
5
OSC
3
VFB
EXT
4
Amp Vref Soft Start Protection UVLO Chip Enable Vref
1
CE
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 cd e f Code a b c Contents Designation of Package Type; N: SOT-23-5 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. 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 Designation of Taping Type; (Refer to Taping Specification)"TR" is prescribed as a standard. Designation of Composition of pin plating -F: Lead free plating
d
e f
3
R1224N
PIN CONFIGURATIO
*
5
SOT-23-5
4
(mark side)
1
2
3
PIN DESCRIPTION
Pin No 1 2 3 4 5 Symbol CE GND VOUT (VFB) EXT VIN Pin Description Chip Enable Pin ("H" Active) Ground Pin Pin for Monitoring Output Voltage (Feedback Voltage) External Transistor Drive Pin (CMOS Output) Power Supply Pin
ABSOLUTE MAXIMUM RATINGS
Symbol VIN VEXT VCE VOUT IEXT PD Topt Tstg VIN Supply Voltage EXT Pin Output Voltage CE Pin Input Voltage VOUT/VFB Pin Input Voltage EXT Pin Inductor Drive Output Current Power Dissipation (SOT-23-5)* Operating Temperature Range Storage Temperature Range Item Rating 20 -0.3 to VIN+0.3 -0.3 to VIN+0.3 -0.3 to VIN+0.3 50 420 -40 to +85 -55 to +125 Unit V V V V A mW C C
* ) 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
Item Operating Input Voltage Step-down Output Voltage Step-down Output Voltage Temperature Coefficient VIN=VCE=VSET+1.5V, IOUT=-100mA When VSET < 1.5V, VIN=VCE=3.0V = -40C < Topt < 85C = = VIN=VCE=VSET+1.5V, IOUT=-100mA When VSET < 1.5, VIN=VCE=3.0V = L/M Version E/G Version F/H Version -40C < Topt < 85C = = VIN=VCE=VOUT=18.5V E/F/L/M Version G version H version VIN=18.5V, VCE=0V, VOUT=0V VIN=8V, VEXT=7.9V, VOUT=8V, VCE=8V VIN=8V, VEXT=0.1V, VOUT=0V, VCE=8V VIN=VCE=VOUT=18.5V VIN=VOUT=18.5V, VCE=0V VIN=8V, VOUT=0V VIN=8V, VOUT=0V 100 E/F/L Version VIN=VCE=2.5V to 1.5V, VOUT=0V VIN=VCE=1.5V to 2.5V, VOUT=0V VIN=VSET+1.5V, IOUT=-10mA VCE=0VVSET+1.5V VIN=VCE=VSET+1.5V VOUT=VSET+1.5V0V 5 5 1.8 35 2.0 VUVLO1 +0.1 10 15 2.2 2.3 20 30 -0.5 1.5 0.3 20 Conditions Min. 2.3 VSET x0.98 VSET 100 Typ. VIN VOUT
VOUT/ Topt
Topt=25C
Symbol
Max. 18.5 VSET x1.02
Unit V V ppm/C
fosc
Oscillator Frequency
144 240 400
180 300 500 0.2 20 30 40 0.0 -17 30 0.0 0.0
216 360 600
kHz
fosc/ Topt
Oscillator Frequency Temperature Coefficient Supply Current 1 Standby Current EXT "H" Output Current EXT "L" Output Current CE "H" Input Current CE "L" Input Current CE "H" Input Voltage CE "L" Input Voltage Oscillator Maximum Duty Cycle VFM Duty Cycle UVLO Voltage UVLO Release Voltage Delay Time by Soft-Start function Delay Time for protection circuit
%/C 50 60 80 0.5 -10
IDD1 Istandby IEXTH IEXTL ICEH ICEL VCEH VCEL Maxdty VFMdty VUVLO1 VUVLO2 tstart tprot
A A mA mA
0.5
A A V V % % V V ms ms
5
R1224N
*
R1224N102X (X=G/H/M)
Item Operating Input Voltage Feedback Voltage Feedback Voltage Temperature Coefficient Oscillator Frequency Oscillator Frequency Temperature Coefficient Supply Current 1 Standby Current EXT "H" Output Current EXT "L" Output Current CE "H" Input Current CE "L" Input Current CE "H" Input Voltage CE "L" Input Voltage Oscillator Maximum Duty Cycle UVLO Voltage UVLO Release Voltage Delay Time by Soft-Start function Delay Time for protection circuit VIN=VCE=2.5V to 1.5V, VFB=0V VIN=VCE=1.5V to 2.5V, VFB=0V VIN=2.5V, IFB=-10mA VCE=0V2.5V VIN=VCE=2.5V VFB=2.5V0V 5 5 VIN=VCE=3.5V, IFB=-100mA -40C < Topt < 85C = = VIN=VCE=3.5V, IFB=-100mA M Version G Version H Version -40C < Topt < 85C = = VIN=VCE=VFB=18.5V M Version G Version H Version VIN=18.5V, VCE=0V, VFB=0V VIN=8V, VEXT=7.9V, VFB=8V, VCE=8V VIN=8V, VEXT=0.1V, VFB=0V, VCE=8V VIN=VCE=VFB=18.5V VIN=VFB=18.5V, VCE=0V VIN=8V, VFB=0V VIN=8V, VFB=0V 100 1.8 2.0 VUVLO1 +0.1 10 15 -0.5 1.5 20 144 240 400 Conditions Min. 2.3 0.98 1.00 100 180 300 500 0.2 20 30 40 0.0 -17 30 0.0 0.0 Typ. VIN VFB
VFB/ Topt
Topt=25C
Symbol
Max. 18.5 1.02
Unit V V ppm/C
fosc
fosc/ Topt
216 360 600
kHz
%/C 50 60 80 0.5 -10
IDD1 Istandby IEXTH IEXTL ICEH ICEL VCEH VCEL Maxdty VUVLO1 VUVLO2 tstart tprot
A A mA mA
0.5
A A V
0.3
V %
2.2 2.3 20 30
V V ms ms
6
R1224N
TYPICAL APPLICATION AND APPLICATION HINTS
(1) Fixed Output Voltage Type (R1224Nxx2E/F/G/H/L/M except xx=10)
L PMOS C1 R1
4 5 VIN 1 CE
EXT R1224N GND VOUT 3 C3 SD LOAD
C2
2
CE CONTROL
PMOS: HAT1044M (Hitachi) SD1 : RB063L-30 (Rohm) C1 : 10F (Ceramic Type) R1 : 10
L : CR105-270MC (Sumida, 27H) C3 : 47F (Tantalum Type) C2 : 0.1F (Ceramic Type)
(2) Adjustable Output Type (R1224N102G/H/M) Example: Output Voltage=3.2V
L PMOS C1 R1 C4 R4 R3 VFB 3 C3 SD R2 LOAD
4 5 VIN 1 CE
EXT R1224N GND
C2
2
CE CONTROL
PMOS: HAT1044M (Hitachi) L : CR105-270MC (Sumida, 27H) SD1 : RB063L-30 (Rohm) C3 : 47F (Tantalum Type) C1 : 10F (Ceramic Type) C2 : 0.1F (Ceramic Type) C4: 1000pF (Ceramic Type) R1 : 10, R2=22k, R3=2.7k, R4=33k
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 22F 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. 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.
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=VFBx(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 ~ 1/2 L x C3
A zero (signal back to zero) is formed with R4 and C4. Fzero~1/(2xR4xC4) For example, if L=27H, C3=47F, 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=33k and C4=1000pF. If VOUT is set at 2.5V, R2=22k is appropriate. R3 prevents feedback of the noise to VFB pin, about 2.7k is appropriate value.
L PMOS C1 R1 C4 R4 R3 VFB 3 C3 SD R2 LOAD
4 5 VIN 1 CE
EXT R1224N GND
C2
2
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:
i1 IOUT VIN Lx Tr SD GND L i2 CL VOUT

IL ILmin ILmax topen
ton T=1/fosc
toff
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=VOUTxtopen/L=(VIN-VOUT)xton/L ................................... Equation 1 wherein, T=1/fosc=ton+toff duty (%)=ton/Tx100=tonxfoscx100 topen < toff = In Equation 1, VOUTxtopen/L and (VIN-VOUT)xton/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, topen0). 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=TxVOUT/VIN..................................................................................... Equation 2 When tonOUTPUT 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)xIOUT+LxIRP/ton .................................................Equation 3
When Lx Tr. is OFF: LxIRP/toff=VF+VOUT+RLxIOUT ............................................................ Equation 4
Put Equation 4 to Equation 3 and solve for ON duty, ton/(toff+ton)=DON, DON=(VOUT+VF+RLxIOUT)/(VIN+VF-RpxIOUT) ......................................Equation 5
Ripple Current is as follows; IRP=(VIN-VOUT-RpxIOUT-RLxIOUT)xDON/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.
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 10F for stable operation. COUT can reduce ripple of Output Voltage, therefore 47F 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 VIN UVLO Voltage
Input Voltage Rising Time CE VOUT Set Output Voltage Protection Circuit Delay Time
UVLO Reset
VOUT Set Output Voltage EXT Reset Protection VOUT Set Output Voltage Stable Operation Stable Operation Stable Operation
VOUT
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
Oscilloscope D1
4
EXT VIN 5 R1224N CE 1 C2
2 GND 3 VOUT (VFB)
C1
V
Supply Current 1
VIN 5
Standby Current
A
2 GND 3 VOUT (VFB)
VIN 5 R1224N CE 1
A
2 GND 3 VOUT (VFB)
R1224N CE 1
EXT "H" Output Current
4 EXT
VIN 5 R1224N CE 1
EXT "L" Output Current
4 EXT
VIN 5 R1224N CE 1
A
2 GND
VOUT 3 (VFB)
A
2 GND
VOUT 3 (VFB)
CE "H" Input Current, CE "L" Input Current
VIN 5
Output Delay Time for Protection Circuit
4 EXT
Oscilloscope VIN 5 R1224N CE 1 C2
2 GND 3 VOUT (VFB)
R1224N CE 1
2 GND 3 VOUT (VFB)
A
PMOS : HAT1044M (Hitachi) SD1 : RB491D (Rohm) C1 : 47F (Tantalum Type)
L : CD104-270MC (Sumida, 27H) C2 : 47F (Tantalum Type)
14
R1224N
TYPICAL CHARACTERISTICS
1)Output Voltage vs. Output Current (*Note)
R1224N182E
1.850
L=10H
1.850
R1224N182F
Output Voltage VOUT(V)
1.830 1.810 1.790
L=10H
Output Voltage VOUT(V)
1.830 1.810 1.790
VIN3.3V
1.770 1.750 0.1
VIN3.3V
1.770 1.750 0.1
VIN5V
VIN5V
1
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current IOUT(mA)
R1224N182G
1.850
L=10H
1.850
R1224N182H
Output Voltage VOUT(V)
L=10H
Output Voltage VOUT(V)
1.830 1.810 1.790 1.770 1.750 0.1
1.830 1.810 1.790 1.770 1.750 0.1
VIN3.3V
VIN3.3V
VIN5V
VIN5V
VIN12V
VIN12V
1
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N182L
1.850
L=27H
1.850
R1224N182M
Output Voltage VOUT(V)
L=27H
Output Voltage VOUT(V)
1.830 1.810 1.790
VIN3.3V
1.830 1.810 1.790 1.770 1.750 0.1
VIN3.3V
1.770 1.750 0.1
VIN5V
VIN5V
VIN12V
1
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
15
R1224N
R1224N332E
3.40
L=10H
3.400
R1224N332F
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1 VIN4.8V
L=10H
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0.1 1 10 100 1000 10000
VIN4.8V
VIN7V
VIN7V
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332G
3.400
L=10H
3.35
R1224N332G (VIN=10V)
Output Voltage VOUT(V)
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1 1
VIN4.8V
3.34 3.33 3.32 3.31 3.30 0.1
VIN12V
VIN15V
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332G (VIN=16V)
3.35 3.400
R1224N332H
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1
VIN4.8V
L=10H
Output Voltage VOUT(V)
3.34 3.33 3.32 3.31 3.30 0.1
VIN12V
VIN15V
1
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
16
R1224N
R1224N332L
3.400
L=27H
3.400
R1224N332M
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1 VIN4.8V VIN12V VIN15V 1 10
L=27H
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1 1 10 100 1000 10000 VIN4.8V
VIN7V
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332M (VIN=5V)
3.35 3.35
R1224N332M (VIN=10V)
Output Voltage VOUT(V)
Output Voltage VOUT(V)
3.34 3.33 3.32 3.31 3.30 0 1 2 3 4 5
3.34 3.33 3.32 3.31 3.30 0 1 2 3 4 5
Output Current lOUT(A)
Output Current lOUT(A)
R1224N332M (VIN=18V)
3.35 5.100
R1224N502E
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900
VIN6.5V
L=10H
Output Voltage VOUT(V)
3.34 3.33 3.32 3.31 3.30 0 1 2 3 4
VIN10V
0.1
1
10
100
1000
10000
Output Current lOUT(A)
Output Current lOUT(mA)
17
R1224N
R1224N502F
5.100
L=10H
5.100
R1224N502G
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1 VIN6.5V
L=10H
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1 1 10 100 1000 10000
VIN12V
VIN15V
VIN6.5V
VIN10V
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502G (VIN=10V)
5.05 5.05
R1224N502G (VIN=16V)
Output Voltage VOUT(V)
Output Voltage VOUT(V)
5.04 5.03 5.02 5.01 5.00 0.1
5.04 5.03 5.02 5.01 5.00 0.1
1
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502H
5.100
L=10H
5.100
R1224N502L
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1
VIN6.5V
L=27H
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1 1
VIN6.5V
VIN12V
VIN15V
VIN10V
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
18
R1224N
R1224N502M
5.100 5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1 1 10
L=27H
*Note: Typical characteristics 1) are obtained with using the following components; PMOS : IRF7406 (IR) L : CDRH127-100MC (Sumida: 10H) SD : RB083L-20 (Rohm) C1 : 25SC47 (Sanyo/OS-con: 47F/25V)x2 C2 : 0.1F (Ceramic Type) C3 : 10SA220 (Sanyo/OS-con: 220F/10V) R1 : 10
Output Voltage VOUT(V)
VIN6.5V
VIN12V
VIN15V
100
1000
10000
Output Current lOUT(mA)
2) Efficiency vs. Output Current (*Note)
R1224N182F (VIN=3.3V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N182F (VIN=5.0V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N182G (VIN=3.3V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N182G (VIN=5.0V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
19
R1224N
R1224N182G (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N182H (VIN=3.3V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N182H (VIN=5.0V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N182H (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N182L (VIN=3.3V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
R1224N182L (VIN=5.0V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
20
R1224N
R1224N182M (VIN=3.3V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
R1224N182M (VIN=5.0V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N182M (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
R1224N332E (VIN=7.0V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332E (VIN=4.8V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N332F (VIN=7.0V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
21
R1224N
R1224N332F (VIN=4.8V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N332G (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332G (VIN=4.8V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
100 90 80 70 60 50 40 30 20 10 0 0.1
R1224N332G (VIN=10V)
Efficiency (%)
Efficiency (%)
1
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332G (VIN=16V)
100 90 80 70 60 50 40 30 20 10 0 0.1
R1224N332G (VIN=15V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
22
R1224N
R1224N332H (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N332H (VIN=4.8V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332H (VIN=15V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N332L (VIN=7.0V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332L (VIN=4.8V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
R1224N332M (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
23
R1224N
R1224N332M (VIN=4.8V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
100 98 96 94 92 90 88 86 84 82 80 0
R1224N332M (VIN=5V)
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
2
3
4
5
Output Current lOUT(mA)
Output Current lOUT(A)
R1224N332M (VIN=10V)
100 98 96 94 92 90 88 86 84 82 80 0 1 2 3 4 5 100 98 96 94 92 90 88 86 84 82 80 0
R1224N332M (VIN=18V)
Efficiency (%)
Efficiency (%)
1
2
3
4
Output Current lOUT(A)
Output Current lOUT(A)
R1224N332M (VIN=15V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
R1224N502E (VIN=6.5V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
24
R1224N
R1224N502E (VIN=10V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N502F (VIN=6.5V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502F (VIN=10V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
100 90 80 70 60 50 40 30 20 10 0 0.1
R1224N502G (VIN=10V)
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502G (VIN=16V)
100 90 80 70 60 50 40 30 20 10 0 0.1
R1224N502G (VIN=6.5V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
25
R1224N
R1224N502G (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N502G (VIN=15V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502H (VIN=6.5V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N502H (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502H (VIN=15V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-10H
R1224N502L (VIN=6.5V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
Efficiency (%)
1
10
100
1000
10000
Efficiency (%)
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
26
R1224N
R1224N502L (VIN=10V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
R1224N502M (VIN=6.5V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
Efficiency (%)
Efficiency (%)
1
10
100
1000
10000
1
10
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502M (VIN=12V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
R1224N502M (VIN=15V)
100 90 80 70 60 50 40 30 20 10 0 0.1
CDRH127-27H
Efficiency (%)
Efficiency (%)
1
10
100
1000
10000
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 : CDRH127-100MC (Sumida: 10H) C2 : 0.1F (Ceramic Type) SD : RB083L-20 (Rohm) C3 : 10SA220 (Sanyo/OS-con: 220F/10V) C1 : 25SC47 (Sanyo/OS-con: 47F/25V)x2 R1 : 10
27
R1224N
3) Ripple Voltage vs. Output Current
R1224N182E
70
L=10H
70
R1224N182F
Ripple Voltage Vrpp(mV)
60 VIN3.3V 50 40 30 20 10 0 0.1 1 10
L=10H
Ripple Voltage Vrpp(mV)
60
VIN3.3V
50 40 30 20 10 0 0.1 1 10 100 1000 10000
VIN5V
VIN5V
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1224N182G
70
L=10H
70
R1224N182H
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 VIN3.3V
L=10H
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN3.3V
VIN5V
VIN5V
VIN12V
VIN12V
10
100
1000
10000
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1224N182L
70
L=27H
70
R1224N182M
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 VIN3.3V
L=27H
Ripple Voltage Vrpp(mV)
60
VIN3.3V
50 40 30 20 10 0 0.1 1
VIN5V
VIN5V
VIN12V
10
100
1000
10000
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
28
R1224N
R1224N332E
70
L=10H
70
R1224N332F
Ripple Voltage Vrpp(mV)
60 VIN4.8V 50 40 30 20 10 0 0.1 1 10
L=10H
Ripple Voltage Vrpp(mV)
60
VIN4.8V
50 40 30 20 10 0 0.1 1 10 100 1000 10000
VIN7V
VIN7V
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1224N332G
70
L=10H
70
R1224N332H
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10
VIN4.8V
L=10H
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN4.8V
VIN12V
VIN12V
VIN15V
VIN15V
10
100
1000
10000
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N332L
70
L=27H
70
R1224N332M
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10
VIN4.8V
L=27H
Ripple Voltage Vrpp(mV)
60
VIN4.8V
50 40 30 20 10 0 0.1 1
VIN7V
VIN12V
VIN15V
10
100
1000
10000
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
29
R1224N
R1224N502E
70
L=10H
70
R1224N502F
Ripple Voltage Vrpp(mV)
60 VIN6.5V 50 40 30 20 10 0 0.1 1 10
L=10H
Ripple Voltage Vrpp(mV)
60
VIN6.5V
50 40 30 20 10 0 0.1 1 10 100 1000 10000
VIN10V
VIN10V
100
1000
10000
Output Current lOUT(mA)
Output Current lOUT(mA)
R1224N502G
70
L=10H
70
R1224N502H
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10
VIN6.5V
L=10H
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN6.5V
VIN12V
VIN12V
VIN15V
VIN15V
10
100
1000
10000
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1224N502L
70
L=27H
70
R1224N502M
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10
VIN6.5V
L=27H
Ripple Voltage Vrpp(mV)
60
VIN6.5V
50 40 30 20 10 0 0.1 1
VIN10V
VIN12V
VIN15V
10
100
1000
10000
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
30
R1224N
4) Output Voltage vs. Input Voltage
R1224N182E
2.00
L=10H
2.00
R1224N182F
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 1mA 500mA 5 10
L=10H
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 5 10 15 20
1mA 500mA
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N182G
2.00
L=10H
2.00
R1224N182H
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0
-1mA -500mA
L=10H
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 5 10 15 20
-1mA -500mA
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N182L
2.00
L=27H
2.00
R1224N182M
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0
1mA 500mA
L=27H
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 5 10 15 20
1mA 500mA
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
31
R1224N
R1224N332E
3.40
L=10H
3.40
R1224N332F
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0 1mA 500mA 5 10
L=10H
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0 5 10 15 20
1mA 500mA
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N332G
3.40
L=10H
3.40
R1224N332H
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0
-1mA -500mA
L=10H
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0 5 10 15 20
-1mA -500mA
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N332L
3.40
L=27H
3.40
R1224N332M
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0
1mA 500mA
L=27H
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0 5 10 15 20
1mA 500mA
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
32
R1224N
R1224N502E
5.20
L=10H
5.20
R1224N502F
Output Voltage VOUT(V)
5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 0 1mA 500mA 5 10
L=10H
Output Voltage VOUT(V)
5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 0 5 10 15 20
1mA 500mA
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N502G
5.20
L=10H
5.20
R1224N502H
Output Voltage VOUT(V)
5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 0
-1mA -500mA
L=10H
Output Voltage VOUT(V)
5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 0
-1mA -500mA
5
10
15
20
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1224N502L
5.20
L=27H
5.20
R1224N502M
Output Voltage VOUT(V)
5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 0
1mA 500mA
L=27H
Output Voltage VOUT(V)
5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 0 5 10 15 20
1mA 500mA
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
33
R1224N
5) Output Voltage vs. Temperature
R1224N332E
3.33 1.210
R1224N122F
Output Voltage VOUT(V)
Output Voltage VOUT(V)
3.32 3.31 3.30 3.29 3.28 3.27 -40
1.205
1.200
1.195
-15
10
35
60
85
1.190 -40
-15
10
35
60
85
Temperature Topt(C)
Temperature Topt(C)
R1224N602L
6.10 1.010
R1224N102G
Output Voltage VOUT(V)
Output Voltage VOUT(V)
6.05
1.005
6.00
1.000
5.95
0.995
5.90 -40
-15
10
35
60
85
0.990 -40
-15
10
35
60
85
Temperature Topt(C)
Temperature Topt(C)
6) Oscillator Frequency vs. Temperature
R1224N102G
Oscillator Frequency fosc(kHz) Oscillator Frequency fosc(kHz)
360 600
R1224N102H
330
550
300
500
270
450
240 -40
-15
10
35
60
85
400 -40
-15
10
35
60
85
Temperature Topt(C)
Temperature Topt(C)
34
R1224N
R1224N102M
Oscillator Frequency fosc(kHz)
216
198
180
162
144 -40
-15
10
35
60
85
Temperature Topt(C)
7) Supply Current vs. Temperature
R1224N332E
25 25
R1224N602L
Supply Current1 Iss1(A)
Supply Current1 Iss1(A)
20 15 10 5 0 -40
20 15 10 5 0 -40
-15
10
35
60
85
-15
10
35
60
85
Temperature Topt(C)
Temperature Topt(C)
R1224N602F
25 40
R1224N102G
Supply Current1 Iss1(A)
Supply Current1 Iss1(A)
20 15 10 5 0 -40
30
20
10
-15
10
35
60
85
0 -40
-15
10
35
60
85
Temperature Topt(C)
Temperature Topt(C)
35
R1224N
R1224N102H
60 40
R1224N102M
Supply Current1 Iss1(A)
Supply Current1 Iss1(A)
50 40 30 20 10 0 -40
30
20
10
-15
10
35
60
85
0 -40
-15
10
35
60
85
Temperature Topt(C)
Temperature Topt(C)
8) Soft-start time vs. Temperature
R1224N102G
15
Soft-start time Tsoft(ms)
10
5 -40
-15
10
35
60
85
Temperature Topt(C)
9) Delay Time for Protection vs. Temperature
R1224N332E
Delay Time for Protection Tprot(ms)
30
25
20
15
10 -40
-15
10
35
60
85
Temperature Topt(C)
36
R1224N
10) EXT "H" Output Current vs. Temperature
R1224N332E
EXT "H" Output Current IEXTH(mA)
-10
-15
-20
-25 -40
-15
10
35
60
85
Temperature Topt(C)
11) EXT "L" Output Current vs. Temperature
R1224N332E
EXT "L" Output Current IEXTL(mA)
50
40
30
20 -40
-15
10
35
60
85
Temperature Topt(C)
12) Load Transient Response
R1224N332G
3.50
L=10H VIN=4.8V
2000 3.50
R1224N332G
Output Current IOUT(mA) Output Voltage VOUT(V)
1800 1600 1400 1200 1000 800 600 400 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
L=10H VIN=4.8V
2000 1600 1400 1200 1000 800 600 400 200 0 0.08
3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 2.50 -0 -0 0
200 0 1E-04 2E-04 3E-04 4E-04
0
0.02
0.04
0.06
Time(sec)
Time(sec)
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.40
1800
37
R1224N
R1224N332G
3.50
L=10H VIN=10V
2000 3.50
R1224N332G
Output Current IOUT(mA) Output Voltage VOUT(V)
1800 1600 1400 1200 1000 800 600 400 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
L=10H VIN=10V
2000 1600 1400 1200 1000 800 600 400 200 0 0.08
3.30 3.20 3.10 3.00 2.90 2.80 2.70
2.60 200 2.50 0 -0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004
0
0.02
0.04
0.06
Time(sec)
Time(sec)
R1224N332H
3.50
L=10H VIN=4.8V
2000 3.50
R1224N332H
Output Current IOUT(mA) Output Voltage VOUT(V)
1800 1600 1400 1200 1000 800 600 400 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
L=10H VIN=4.8V
2000 1600 1400 1200 1000 800 600 400 200 0 0.08
3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 2.50 -2E-04 -1E-04
0
200 0 1E-04 2E-04 3E-04 4E-04
0
0.02
0.04
0.06
Time(sec)
Time(sec)
R1224N332H
3.50
L=10H VIN=10V
2000 3.50
R1224N332H
Output Current IOUT(mA) Output Voltage VOUT(V)
1800 1600 1400 1200 1000 800 600 400 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 2.50 -2E-04 -1E-04
L=10H VIN=10V
2000 1600 1400 1200 1000 800 600 400 200 0 0.0001 0.0002 0.0003 0.0004
3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 2.50 -2E-04 -1E-04
0
200 0 1E-04 2E-04 3E-04 4E-04
0
Time(sec)
Time(sec)
38
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.40
1800
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.40
1800
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.40
1800
R1224N
R1224N332M
3.50
L=27H VIN=4.8V
2000 3.50
R1224N332M
Output Current IOUT(mA) Output Voltage VOUT(V)
1800 1600 1400 1200 1000 800 600 400 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
L=27H VIN=4.8V
2000 1600 1400 1200 1000 800 600 400 200 0 0.08
3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 2.50 -2E-04 -1E-04
0
200 0 0.0001 0.0002 0.0003 0.0004
0
0.02
0.04
0.06
Time(sec)
Time(sec)
R1224N332M
3.50
L=27H VIN=10V
2000 3.50
R1224N332M
Output Current IOUT(mA) Output Voltage VOUT(V)
1800 1600 1400 1200 1000 800 600 400 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
L=27H VIN=10V
2000 1600 1400 1200 1000 800 600 400 200 0 0.08
3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 2.50 -2E-04 -1E-04
0
200 0 1E-04 2E-04 3E-04 4E-04
0
0.02
0.04
0.06
Time(sec)
Time(sec)
12) UVLO Voltage vs. Temperature
R1224N332E
2.20
UVLO Voltage VUVLO(V)
2.15 2.10 2.05 2.00 1.95 1.90 -40
-15
10
35
60
85
Temperature Topt(C)
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.40
1800
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.40
1800
39
PACKAGE INFORMATION
PE-SOT-23-5-0610
*
SOT-23-5 (SC-74A)
Unit: mm
PACKAGE DIMENSIONS
2.90.2 1.90.2 (0.95) (0.95) +0.2 1.1 -0.1 0.80.1 4
5
+0.2 1.6 -0.1
2.80.3
0 to 0.1
1
2 0.40.1
3
TAPING SPECIFICATION
0.30.1 +0.1 1.5 0 4.00.1 2.00.05 1.750.1 3.50.05 4.00.1 1.10.1 8.00.3
3.3 2.0Max.
3.2
TR User Direction of Feed
TAPING REEL DIMENSIONS
(1reel=3000pcs)
REUSE REEL (EIAJ-RRM-08Bc)
11.41.0 9.00.3
210.8
60 +1 0 180 0 -1.5
20.5
130.2
0.2 Min.
+0.1 0.15 -0.05
PACKAGE INFORMATION
PE-SOT-23-5-0610
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 Through-hole Measurement Result
(Topt=25C,Tjmax=125C)
Mounting on Board (Wind velocity=0m/s) Glass cloth epoxy plactic (Double sided) 40mm x 40mm x 1.6mm Top side : Approx. 50% , Back side : Approx. 50% 0.5mm x 44pcs
Standard Land Pattern Power Dissipation Thermal Resistance
600
Free Air 250mW 400C/W
420mW ja=(125-25C)/0.42W=263C/W
Power Dissipation PD(mW)
500 420 400 300 200 100 0 0 25
On Board
40
Free Air 250
40
50 75 85 100 Ambient Temperature (C)
125
150
Power Dissipation
Measurement Board Pattern IC Mount Area Unit : mm
RECOMMENDED LAND PATTERN
0.7 MAX. 1.0
2.4
0.95 0.95 1.9
(Unit: mm)
MARK INFORMATION
ME-R1224N-0612
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
1 2 3
Part Number R1224N102G R1224N122G R1224N152G R1224N182G R1224N252G R1224N302G R1224N332G R1224N362G R1224N402G R1224N502G R1224N552G R1224N602G R1224N122E R1224N152E R1224N182E R1224N222E R1224N252E R1224N262E R1224N272E R1224N302E R1224N332E R1224N502E R1224N552E R1224N602E
Part Number 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
Product Code
1 2 3
Part Number 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
Product Code
1 2 3
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
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
M M M M M M M M M M M L 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

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