RP402x Series
High Efficiency Small Packaged Step-up DC/DC Converter
NO.EA-317-150121
OUTLINE
The RP402x is a CMOS-based high efficiency step-up DC/DC converter with synchronous rectifier. The device
can start up with low voltage of typically 0.7 V which is ideal for the applications powered by either one-cell or
two-cell alkaline, nickel-metal-hydride (NiMH) or one-cell Lithium-ion (Li+) batteries.
Internally, the RP402x consists of an oscillator, a reference voltage unit with soft start, a chip enable circuit, an
error amplifier, phase compensation circuits, a slope circuit, a PWM control circuit, a start-up circuit, a
PWM/VFM mode control circuit, internal switches and protection circuits.
The RP402x is employing synchronous rectification for improving the efficiency or rectification by replacing
diodes with built-in switching transistors. Using synchronous rectification not only increases circuit performance
but also allows a design to reduce parts count.
The RP402x is available in either internally fixed output voltage type or adjustable output voltage type. The
RP402xxxxx is the internally fixed output voltage type. The RP402x00xx is the adjustable output voltage type,
which allows output voltages that range from 1.8 V to 5.5 V via an external divider resistor.
The RP402x provides the forced PWM control and the PWM/VFM auto switching control. Either one of these
can be selected by inputting a signal to the MODE pin. The forced PWM control switches at fixed frequency
rate in low output current in order to reduce noise. Likewise, the PWM/VFM auto switching control automatically
switches from PWM mode to VFM mode in low output current in order to achieve high efficiency. The RP402N
is available in the PWM/VFM auto switching control. However, the RP402N is also available in the forced PWM
control as a custom-designed IC*1.
The RP402x has a soft-start time of typically 0.5 ms.
The RP402x features the complete output disconnect shutdown option and the input-to-output bypass
shutdown option. The RP402xxxxA/ B/ E/ F incorporates the complete output disconnect shutdown option,
which allows the output to be disconnected from the input. The RP402xxxxC/ D/ G/ H incorporates the inputto-output bypass shutdown option, which allows the output to be connected to the input.
The RP402x is protected against damage by a short-current protection, an over-voltage lockout, an over
voltage protection, an anti-ringing switch and a latch-type protection. An anti-ringing switch prevents the
occurrence of noise when an inductor current reaches a discontinuous mode. The latch-type protection can
be released by switching the CE pin from high to low.
The RP402x is offered in a compact 5-pin SOT23-5*1 package or a 8-pin DFN(PLP)2020-8 package.
*1
As for the custom-designed IC, please contact our sales representatives.
1
RP402x
NO.EA-317-150121
FEATURES
Low Voltage Start-up ·································· Typ. 0.7 V
Input Voltage Range ··································· Fixed Output Voltage Type: 0.6 V to 4.8 V
Adjustable Output Voltage Type: 0.6 V to 4.6 V
High Efficiency ·········································· 94% (100 mA/ 5.0 V, VIN = 3.6 V, 25°C)
90% (1 mA/ 5.0 V, VIN = 3.6 V, 25°C)
Output Current ·········································· 800 mA: VIN = 3.6 V, VOUT = 5.0 V
LX Driver ON Resistance ····························· NMOS/ PMOS: 0.20 Ω (VOUT = 5.0 V, 25°C)
PWM Oscillator Frequency ·························· 1.2 MHz (Normal PWM), 1.0 MHz (Forced PWM)
Output Voltage Range································· Fixed Output Voltage Type: 1.8 V to 5.5 V, 0.1 V step
Adjustable Output Voltage Type: 1.8 V to 5.5 V (recommended)
OVLO Detector Threshold ··························· Typ. 5.1 V
OVP Detector Threshold ····························· Typ. 6.0 V
LX Peak Current Limit ································· Typ. 1.5 A
Latch Protection Delay Time························· Typ. 3.3 ms (RP402Kxx1x, RP402Nxx1x)
Typ. 4.1 ms (RP402Kxx2x)
Soft-start Time ·········································· Typ. 0.5 ms
EMI Suppression (Built-in Anti-ringing Switch) (RP402Kxx1x, RP402Nxx1x)
Voltage Regulation at VIN > VOUT
Zero Input Complete Shutdown at VIN = 0 V
Input-to-Output Bypass Shutdown Option at CE = L (RP402xxxxC/ D/ G/ H)
Ceramic Capacitor Capable
Package ·················································· DFN(PLP)2020-8, SOT23-5
APPLICATIONS
MP3 Players, PDA
Digital Still Cameras
LCD Bias Supplies
Portable Blood Pressure Meter
Wireless Handset
GPS
USB-OTG
HDMI
2
RP402x
NO.EA-317-150121
BLOCK DIAGRAMS
RP402Kxxxx Block Diagram
*1
*2
This Bypass Switch is included in the RP402KxxxC / D only.
This Latch Timer is included in the RP402KxxxA / C only.
BYPASS
SW *1
OVER VOLTAGE
PROTECTION
Lx
VIN
REVERSE
DETECTOR
VFM
CONTROLLER
MODE
VREF
POWER
CONTROLLER
STARTUP
CIRCUIT
+
PWM
CONTROLLER
-
VOUT
OSCILLATOR
BACKGATE
CONTROLLER
SOFT
START
CE
CHIP
ENABLE
LATCH
TIMER*2
SWITCHING
CONTROLLER
CURRENT
PROTECTION
SHORT
PROTECTION
RAMP
COMPENSATION
＋
CURRENT
FEEDBACK
GND
RP402K00xx Block Diagram
*1
This Bypass Switch is included in the RP402KxxxC / D only.
*2
This Latch Timer is included in the RP402KxxxA / C only.
BYPASS
SW *1
OVER VOLTAGE
PROTECTION
VIN
Lx
REVERSE
DETECTOR
VFM
CONTROLLER
MODE
VREF
OSCILLATOR
POWER
CONTROLLER
STARTUP
CIRCUIT
+
PWM
CONTROLLER
-
VOUT
BACKGATE
CONTROLLER
SOFT
START
CE
CHIP
ENABLE
LATCH
TIMER*2
SWITCHING
CONTROLLER
CURRENT
PROTECTION
SHORT
PROTECTION
RAMP
COMPENSATION
＋
VFB
CURRENT
FEEDBACK
GND
3
RP402x
NO.EA-317-150121
RP402Nxxxx Block Diagram
*1
*2
This Bypass Switch is included in the RP402NxxxG/ H only.
This Latch Timer is included in the RP402NxxxE/ G only.
BYPASS
SW *1
OVER VOLTAGE
PROTECTION
VIN
Lx
REVERSE
DETECTOR
VFM
CONTROLLER
VREF
POWER
CONTROLLER
STARTUP
CIRCUIT
+
PWM
CONTROLLER
-
VOUT
OSCILLATOR
BACKGATE
CONTROLLER
SOFT
START
CE
CHIP
ENABLE
LATCH
TIMER*2
SWITCHING
CONTROLLER
CURRENT
PROTECTION
SHORT
PROTECTION
RAMP
COMPENSATION
＋
CURRENT
FEEDBACK
GND
4
RP402x
NO.EA-317-150121
SELECTION GUIDE
The package type, the set output voltage, the PWM control type, the shutdown option, the MODE pin option,
and the latch function are user-selectable options.
Selection Guide
Product Name
RP402Kxx#$-TR
RP402Nxx#$-TR-FE
Package
Quantity per Reel
Pb Free
Halogen Free
DFN(PLP)2020-8
5,000 pcs
Yes
Yes
SOT-23-5
3,000 pcs
Yes
Yes
xx: Specify the set output voltage (VSET).
00: Adjustable Output Voltage Type (1.8 V to 5.5 V, recommended voltage range)
xx: Fixed Output Voltage Type (1.8 V to 5.5 V, adjustable in 0.1 V step)
Please note: SOT-23-5 package is only available with fixed output voltage type.
#: Specify the PWM control type.
1: Normal PWM operation
2: Forced PWM operation
$: Specify the combination of the shutdown option, the MODE pin option and the latch function.
Version
Shutdown Options at CE = L
MODE Pin
Latch Function
A
Complete Output Disconnect
Yes
Yes
B
Complete Output Disconnect
Yes
No
C
Input-to-Output Bypass
Yes
Yes
D
Input-to-Output Bypass
Yes
No
E
Complete Output Disconnect
No
Yes
F
Complete Output Disconnect
No
No
G
Input-to-Output Bypass
No
Yes
H
Input-to-Output Bypass
No
No
Please refer to Selection Guide Table on the next page for detailed information.
5
RP402x
NO.EA-317-150121
Selection Guide Table
Package
Output
Voltage
Type
#$
Shutdown
Option
at CE = L
MODE Pin Function
MODE
Pin
1A
2A Complete
Output
Disconnect
1B
Fixed Output
Voltage Type
2B
1C
1D
Input-toOutput
Bypass
Yes
DFN(PLP)2020-8
1A
Adjustable
Output
Voltage
Type
2A Complete
Output
Disconnect
1B
2B
1C
1D
SOT-23-5
6
Fixed Output
Voltage Type
Input-toOutput
Bypass
1E Complete
Output
1F Disconnect
Power Controlling Method
“H”: Normal PWM Control,
“L”: PWM/VFM Auto Switching
Control
“H”: Forced PWM Control
Note: “H” recommended
“H”: Normal PWM Control,
“L”: PWM/VFM Auto Switching
Control
“H”: Forced PWM Control
Note: “H” recommended
“H”: Normal PWM Control,
“L”: PWM/VFM Auto Switching
Control
“H”: Normal PWM Control,
“L”: PWM/VFM Auto Switching
Control
“H”: Normal PWM Control,
“L”: PWM/VFM Auto Switching
Control
“H”: Forced PWM Control
Note: “H” recommended
“H”: Normal PWM Control,
“L”: PWM/VFM Auto Switching
Control
“H”: Forced PWM Control
Note: “H” recommended
“H”: Normal PWM Control,
“L”: PWM/VFM Auto Switching
Control
“H”: Normal PWM Control,
“L”: PWM/VFM Auto Switching
Control
PWM/VFM Auto Switching Control
PWM/VFM Auto Switching Control
No
1G Input-toOutput
1H Bypass
PWM/VFM Auto Switching Control
PWM/VFM Auto Switching Control
PWM
Latch
Controlling
Function
Method
Normal
PWM
Yes
Forced
PWM
Normal
PWM
No
Forced
PWM
Normal
PWM
Yes
Normal
PWM
No
Normal
PWM
Yes
Forced
PWM
Normal
PWM
No
Forced
PWM
Normal
PWM
Yes
Normal
PWM
No
Normal
PWM
Normal
PWM
Normal
PWM
Normal
PWM
Yes
No
Yes
No
RP402x
NO.EA-317-150121
PIN DESCRIPTION
Top View
8
7
6
Bottom View
5
5
6
7
5
4
8
∗
1
2
3
4
4
3
2
1
1
DFN(PLP)2020-8 Pin Configurations
RP402Kxxxx Pin Description
Pin No.
Symbol
1
MODE
2
NC
3
GND
2
3
SOT-23-5 Pin Configurations
Description
Mode Pin
*1
No Connection
Ground Pin
4
Lx
5
VOUT
Internal NMOS Switch Drain Pin
6
VIN
Power Supply Pin
7
NC
No Connection
8
CE
Chip Enable Pin (Active-high)
Output Pin
∗ The tab on the bottom of the package enhances thermal performance and is electrically connected to GND (substrate
level). It is recommended that the tab be connected to the ground plane on the board, or otherwise be left floating.
*1 MODE Pin = “H” is recommended for RP402Kxx2x.
RP402K00xx Pin Description
Pin No.
Symbol
1
MODE
2
NC
3
GND
4
Lx
5
VOUT
Description
MODE Pin*2
No Connection
Ground Pin
Internal NMOS Switch Drain Pin
Output Pin
6
VIN
Power Supply Pin
7
VFB
Feedback Input Pin for Setting Output Voltage
8
CE
Chip Enable Pin (Active-high)
∗ The tab on the bottom of the package enhances thermal performance and is electrically connected to GND (substrate
level). It is recommended that the tab be connected to the ground plane on the board, or otherwise be left floating.
*2 MODE Pin = “H” is recommended for RP402Kxx2x.
7
RP402x
NO.EA-317-150121
RP402Nxx1x Pin Description
Pin No.
Symbol
1
Lx
Description
Internal NMOS Switch Drain Pin
2
GND
3
CE
Ground Pin
Chip Enable Pin (Active-high)
4
VIN
Power Supply Pin
5
VOUT
Output Pin
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings
Symbol
Rating
Unit
VIN Pin Voltage
−0.3 to 6.5
V
VOUT
VOUT Pin Voltage
−0.3 to 7.0
V
VLX
LX Pin Voltage
−0.3 to 6.5
V
VCE
CE Pin Voltage
−0.3 to 6.5
V
VFB
VFB Pin Voltage (RP402K00xx only)
−0.3 to 6.5
V
MODE Pin Voltage (RP402Kxxxx only)
−0.3 to 6.5
V
VIN
VMODE
PD
Ta
Tstg
*1
Item
Power Dissipation (DFN(PLP)2020-8)*1
Standard Land Pattern
880
Power Dissipation (SOT23-5)*1
Standard Land Pattern
420
mW
Operating Temperature Range
−40 to 85
°C
Storage Temperature Range
−55 to 125
°C
Refer to PACKAGE INFORMATION for detailed information.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent
damages and may degrade the life time and safety for both device and system using the device in the field. The
functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS
(ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the recommended
operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And
the semiconductor devices may receive serious damage when they continue to operate over the recommended
operating conditions.
8
RP402x
NO.EA-317-150121
ELECTRICAL CHARACTERISTICS
are guaranteed by design engineering at −40°C ≤ Ta ≤ 85°C.
The specifications surrounded by
RP402xxxxx Electrical Characteristics (Not applicable to RP402K00xx)
Symbol
VIN
Item
Conditions
Start-up Voltage
RL = 5.5 kΩ
VHOLD
Hold-on Voltage after
start-up*1
RL = 5.5 kΩ
VOVLO
OVLO Voltage
VOVP
OVP Voltage
IDD1
Quiescent Current 1
IDD2
Quiescent Current 2*2
Unit
4.8
V
0.8
V
V
5.1
V
6.0
V
VIN = VSET −0.4 V, VOUT = 0.95 x VSET
1.6
mA
VIN = VSET −0.4 V, VOUT = VSET + 0.2 V
21
37
0.2
1.0
4.8
Standby Current
Output Voltage
VIN = VCE = 1.5 V
Output-Voltage
Temperature Coefficient
−40°C ≤ Ta ≤ 85°C
RP402xxx1x
fosc
Max.
0.6
RP402xxxxC/ D/ G/ H
ΔVOUT
/ΔTa
Typ.
0.7
RP402xxxxA/ B/ E/ F
VOUT
Min.
Input Voltage
VSTART
Istandby
(Ta = 25°C)
Switching Frequency
RP402xxx2x
VIN = 4.8 V,
VOUT = 0V,
VCE = 0V
VIN = 4.8 V,
VCE = 0 V
µA
1.2
x 0.985
VIN = 1.5 V,
VOUT = 0.95 x VSET
µA
2.5
x 1.015
ppm
/°C
±50
1080
1020
900
850
V
1200
1320
1380
1000
1100
1150
kHz
RONN
NMOS ON Resistance*1
VOUT = 5.0 V
0.20
Ω
RONP
PMOS ON Resistance*1
VOUT = 5.0 V
0.20
Ω
ICEH
CE ”H” Input Current
VIN = 4.8 V, VOUT = VCE = 5 V
ICEL
CE ”L” Input Current
VIN = 4.8 V, VOUT = 5 V, VCE = 0 V
RP402xxx1x
0.5
−0.5
µA
µA
VIN = 4.8V,
VCE = 0 V,
VMODE = 5.5 V
0.5
IMODEH
MODE ”H” Input Current*3
IMODEL
MODE ”L” Input Current*3
VIN = 4.8 V, VCE = VMODE = 0 V
ILXH
Lx ”H” Leakage Current
VIN = VOUT = VLX = 4.8V, VCE = 0 V
0.5
µA
ILXL
Lx ”L”Leakage Current
VOUT = 5 V, VLX = 0 V, VCE = 0 V
0.5
µA
RP402xxx2x
72
−0.5
Lx Limit Current *4
1.3
VCEH
CE ”H” Input Voltage
0.7
VCEL
CE “L” Input Voltage
ILXPEAK
MODE ”H” Input Voltage*3
VMODEL
*3
MODE ”L” Input Voltage
µA
1.5
A
V
0.3
VMODEH
µA
1.0
V
V
0.4
V
9
RP402x
NO.EA-317-150121
ELECTRICAL CHARACTERISTICS (continued)
The specifications surrounded by
are guaranteed by design engineering at −40°C ≤ Ta ≤ 85°C.
RP402xxxxx Electrical Characteristics (Not applicable to RP402K00xx)
Symbol
Item
Conditions
(Ta = 25°C)
Min.
Typ.
Max.
Unit
80
88
95
%
Oscillator Maximum Duty
Cycle
VIN = 1.5 V, VOUT = 0.95 x VSET
tstart
Soft-start Time*5
Measures the time when VCE = 0 V
to 1.5 V, VOUT = VSET x 0.95
0.25
0.5
0.70
ms
tprot
Protection Delay Time*6
RP402xxx1x
2.7
3.3
3.9
ms
RP402xxx2x
3.5
4.1
4.7
Maxduty
RONA
RONB
IINZERO
Anti-ringing Switch ON
Resistance*7
Bypass Switch ON
Resistance*8
VIN Zero Current
VIN = 2.5 V, VOUT = 3.3 V
RP402xxxxC/ D/ G/ H
VIN = 0 V, VOUT = 5.5 V
VIN = 3.0 V,
VOUT = 0 V
100
Ω
160
Ω
0.1
1.0
µA
All test items listed under ELECTRICAL CHARACTERISTICS are done under the pulse load condition (Tj ≈ Ta = 25°C).
*1
Hold-on Voltage and NMOS/ PMOS ON Resistance are dependent on VOUT.
*2
Quiescent Current 2 is not applicable to RP402xxx2x.
*3
MODE “H”/ “L” Input Current/ Voltage is only applicable to RP402Kxxxx.
*4
LX Limit Current fluctuates depending on Duty.
*5
VIN ≥ 1.7 V
*6
Protection Delay Time is not included in RP402xxxxB/ D/ F/ H.
*7
Anti-ringing Switch ON Resistance is dependent on VOUT. Not applicable to RP402xxx2x.
*8
Bypass Switch ON Resistance is dependent on VIN.
10
RP402x
NO.EA-317-150121
Electrical Characteristics by Differenct Output Voltage
VOUT (Ta = 25°C)
Product
Name
Min.
Typ.
Max.
RP402x18xx
RP402x19xx
RP402x20xx
RP402x21xx
RP402x22xx
RP402x23xx
RP402x24xx
RP402x25xx
RP402x26xx
RP402x27xx
RP402x28xx
RP402x29xx
RP402x30xx
RP402x31xx
RP402x32xx
RP402x33xx
RP402x34xx
RP402x35xx
RP402x36xx
RP402x37xx
RP402x38xx
RP402x39xx
RP402x40xx
RP402x41xx
RP402x42xx
RP402x43xx
RP402x44xx
RP402x45xx
RP402x46xx
RP402x47xx
RP402x48xx
RP402x49xx
RP402x50xx
RP402x51xx
RP402x52xx
RP402x53xx
RP402x54xx
RP402x55xx
1.773
1.872
1.970
2.069
2.167
2.266
2.364
2.463
2.561
2.660
2.758
2.857
2.955
3.054
3.152
3.251
3.349
3.448
3.546
3.645
3.743
3.842
3.940
4.039
4.137
4.236
4.334
4.433
4.531
4.630
4.728
4.827
4.925
5.024
5.122
5.221
5.319
5.417
1.800
1.900
2.000
2.100
2.200
2.300
2.400
2.500
2.600
2.700
2.800
2.900
3.000
3.100
3.200
3.300
3.400
3.500
3.600
3.700
3.800
3.900
4.000
4.100
4.200
4.300
4.400
4.500
4.600
4.700
4.800
4.900
5.000
5.100
5.200
5.300
5.400
5.500
1.827
1.929
2.030
2.132
2.233
2.335
2.436
2.538
2.639
2.741
2.842
2.944
3.045
3.147
3.248
3.350
3.451
3.553
3.654
3.756
3.857
3.959
4.060
4.162
4.263
4.365
4.466
4.568
4.669
4.771
4.872
4.974
5.075
5.177
5.278
5.380
5.481
5.582
11
RP402x
NO.EA-317-150121
ELECTRICAL CHARACTERISTICS (continued)
The specifications surrounded by
are guaranteed by design engineering at −40°C ≤ Ta ≤ 85°C.
RP402K00xx Electrical Characteristics
Symbol
VIN
(Ta = 25°C)
Item
Conditions
Start-up Voltage
RL = 5.5 kΩ
VHOLD
Hold-on Voltage after startup*1
RL = 5.5 kΩ
VOVLO
OVLO Voltage
VOVP
OVP Voltage
IDD1
Quiescent Current 1
VIN = 3 V, VOUT = 5 V, VFB = 0.6 V
IDD2
Quiescent Current 2*2
VIN = 4.8 V, VOUT = 5.5 V,
VFB = 2.0 V, VMODE = 0 V
VIN = 4.8 V,
VOUT = 0V,
RP402KxxxA/ B
VCE = 0V
VIN = 4.8 V,
RP402KxxxC/ D
VCE = 0 V
VFB
ΔVFB
/ΔTa
0.7
Standby Current
Feedback Voltage
VIN = 3.0 V, VOUT = 5 V
Output Voltage
Temperature Coefficient
−40°C ≤ Ta ≤ 85°C
Switching Frequency
RP402K002x
Max.
Unit
4.6
V
0.8
V
V
0.6
4.6
RP402K001x
fosc
Typ.
Input Voltage
VSTART
Istandby
Min.
5.1
V
6.0
V
1.6
mA
21
37
0.2
1.0
µA
0.985
1.2
2.5
1.00
1.015
1080
1020
900
850
V
ppm
/°C
±50
VIN = 3.0 V,
VOUT = 3.3 V,
VFB = 0.6 V
µA
1200
1320
1380
1000
1100
1150
kHz
RONN
NMOS ON Resistance*1
VOUT = 5.0 V
0.20
Ω
RONP
PMOS ON Resistance*1
VOUT = 5.0 V
0.20
Ω
ICEH
CE ”H” Input Current
VIN = 4.8 V, VOUT = VCE = 5.5 V
ICEL
CE ”L” Input Current
VIN = 4.8 V, VOUT = 5 V, VCE = 0 V
RP402K001x
0.5
−0.5
µA
µA
VIN = 4.8 V,
VMODE = 5.5 V,
VCE = 0 V
0.5
IMODEH
MODE ”H” Input Current
IMODEL
MODE ”H” Input Current
VIN = 4.8 V, VCE = VMODE = 0 V
ILXH
Lx ”H” Leakage Current
VIN = VOUT = VLX = 4.8 V, VCE = 0 V
0.5
µA
ILXL
Lx ”L”Leakage Current
VOUT = 5.0 V, VLX = 0 V, VCE = 0 V
0.5
µA
ILXPEAK
*3
RP402K002x
72
−0.5
Lx Limit Current
1.3
VCEH
CE ”H” Input Voltage
0.7
VCEL
CE ”L” Input Voltage
VMODEH
12
MODE ”H” Input Voltage
µA
1.5
A
V
0.3
1.0
µA
V
V
RP402x
NO.EA-317-150121
ELECTRICAL CHARACTERISTICS (continued)
The specifications surrounded by
are guaranteed by design engineering −40°C ≤ Ta ≤ 85°C.
RP402K00xx Electrical Characteristics
Symbol
Item
VMODEL
MODE ”L” Input Voltage
Maxduty
Oscillator Maximum Duty
Cycle
tstart
Soft-start Time*4
tprot
Protection Delay Time*5
RONA
RONB
IINZERO
Anti-ringing Switch ON
Resistance*6
Bypass Switch ON
Resistance*7
VIN Zero Current
(Ta = 25°C)
Conditions
VIN = 3.0 V, VOUT = 3.3 V, VFB = 0.6
V
Measures the time when VOUT = 3.3
V, VCE = 0 V to 1.5 V, VOUT = 3.13 V
Min.
Typ.
Max.
Unit
0.4
V
80
88
95
%
0.25
0.5
0.70
ms
RP402K001x
2.7
3.3
3.9
ms
RP402K002x
3.5
4.1
4.7
ms
VIN = 2.5 V, VOUT = 3.3 V
RP402KxxxC/ D
VIN = 3.0 V,
VOUT = 0 V
VIN = 0 V, VOUT = 5.5 V
100
Ω
160
Ω
0.1
1.0
µA
All test items listed under ELECTRICAL CHARACTERISTICS are done under the pulse load condition (Tj ≈ Ta = 25°C).
*1
Hold-on Voltage and NMOS/ PMOS ON Resistance are dependent on VOUT.
*2
Quiescent Current 2 is not applicable to RP402K002x.
*3
LX Limit Current fluctuates depending on Duty.
*4
Soft-start Time is VIN ≥ 1.7 V.
*5
Protection Delay Time is not applicable to RP402K00xB/ 001D.
*6
Anti-ringing Switch ON Resistance is dependent on VOUT. Not applicable to RP402K002x.
*7
Bypass Switch ON Resistance is dependent on VIN.
13
RP402x
NO.EA-317-150121
TYPICAL APPLICATION
L
C1
LX
VIN
RP402Kxxxx
VOUT
CE Control
MODE Control
CE
C2
VOUT
MODE
GND
RP402Kxxxx Typical Application (Fixed Output Voltage Type)
L
C1
LX
VIN
RP402K00xx
VOUT
CE Control
MODE Control
C2
CE
VOUT
RSPD
R1
MODE
CSPD
VFB
GND
R2
RP402K00xx Typical Application (Adjustable Output Voltage Type)
L
C1
LX
VIN
RP402Nxx1x
CE Control
CE
VOUT
C2
VOUT
GND
RP402Nxx1x Typical Application (Fixed Output Voltage Typ)
14
RP402x
NO.EA-317-150121
Recommended Components
Symbol
Descriptions
L
VLF403215MT-2R2M, 2.2 µH, TDK
C1 (CIN)
GRM188R60J106ME84, 10 µF, Murata
GRM188R60J106ME84, 10 µF x 2, Murata
C2 (COUT)
As for the fixed output voltage type (RP402x50xx), 10 µF x 1 can be used if the
mounting area is limited.
The speedup capacitor (CSPD) is required for the adjustable output voltage type.
Connect CSPD in parallel with the output resistor (R1).
To calculate the CSPD value, the following equation can be used:
f = 1 / (2 π × CSPD × R1)
CSPD
Adjust the CSPD value to make the oscillator frequency (f) approximately 20 kHz.
For example, VOUT = 5.0 V, R1 = 2 MΩ, R2 = 500 kΩ and CSPD = 4 pF.
The R1 and R2 values are calculated based on the operation efficiency under a light
load, therefore R1 and R2 are having high-resistance values. The feedback voltage
(VFB) can be affected by noise. To stabilize the device operation, decrease the R1 and
R2 values.
The speedup resistor (RSPD) is required for the adjustable output voltage type.
RSPD
Using RSPD can prevent the deterioration of the characteristics due to noise.
If there’s a possibility of generation of a spike noise, use an approximately 1 kΩ RSPD.
15
RP402x
NO.EA-317-150121
TECHNICAL NOTES
The performance of power source circuits using this device largely depends on the peripheral circuits. When
selecting the peripheral components, consider the conditions of use. Do not allow each component, PCB
pattern and the device to exceed their respected rated values (voltage, current and power) when designing
the peripheral circuits.
•
Ensure the VIN and GND lines are firmly connected. A large switching current flows through the GND lines
and the VIN line. If their impedance is too high, noise pickup or unstable operation may result. When the
built-in switch is turned off, the inductor may generate a spike-shaped high voltage. Use the highbreakdown voltage capacitor (COUT) which output voltage is 1.5 times or more than the set output voltage.
•
After a boosting of the step-up converter, the converter uses VOUT as a main power source. Therefore,
the ceramic capacitor between the VOUT pin and the GND pin acts as a bypass capacitor. Considering the
bias dependence, place a 10 µF or more ceramic capacitor (COUT) between the VOUT pin - the GND pin as
close as possible. Also, place an approximately 10 µF ceramic capacitor (CIN) between the VIN pin - the
GND pin.
•
Use a 2.2 µH inductor (L) which is having a low equivalent series resistance, having enough tolerable
current and which is less likely to cause magnetic saturation.
•
The MODE pin is controlled with a logic voltage. To make it "H", 1.0 V or more must be forced to the
MODE pin. If power supply is less than 1.0 V, MODE pin must be pulled up to VOUT.
•
•
When using Forced PWM Control Type, the MODE pin should be “H”.
The RP402x can reset the latch protection circuit with the CE signal. However, starting up the device while
CIN is too large and VIN is less than 0.8 V cannot reset the latch protection circuit correctly. Likewise,
starting up the device while the CE pin is shorted to the VIN pin or VOUT pin cannot reset the latch protection
circuit correctly.
16
RP402x
NO.EA-317-150121
THEORY OF OPERATION
Forced PWM Control Type (RP402xx2A/ B)
While normal PWM control type prevents the reverse inductor current at light load, forced PWM control type
makes the inductor current reverse in order to eliminate the discontinuous current period. Therefore, even at
light load or when the voltage difference between input and output is less, forced PWM control type can
provide PWM operation without bursting.
ILx
Normal PWM
Lx
ILx
Forced PWM
Lx
Operating Waveform of Normal PWM/ Forced PWM Control Type
There is a case that forced PWM control performs burst operation without PWM operation because of the
conditions of use. The conditions which cause burst operation are various and differ in set output voltage, input
voltage, ambient temperature and load current.
Please note that forced PWM control type decreases the efficiency at light load and does not include antiringing switch. The graph below indicates the typical operational maximum input voltage of forced PWM control
type.
RP402Kxx1x: MODE = ”H” (Normal PWM), RP402Kxx2x: (Forced PWM)
RP402K33xx
RP402K18xx
( Ta = 25°C)
1.8
3.5
1.6
3
Input Voltage @ PWM [V]
Input Voltage @ PWM [V]
( Ta = 25°C)
1.4
1.2
1
0.8
0.6
0.4
RP402K181x
0.2
RP402K182x
0
2.5
2
1.5
1
RP402K331x
RP402K332x
0.5
0
1
10
Output Current IOUT [mA]
100
1
10
Output Current IOUT [mA]
100
17
RP402x
NO.EA-317-150121
RP402K50xx
RP402K55xx
( Ta = 25°C)
( Ta = 25°C)
5
6
4
Input Voltage @ PWM [V]
Input Voltage @ PWM [V]
4.5
3.5
3
2.5
2
1.5
RP402K501x
RP402K502x
1
0.5
5
4
3
2
RP402K551x
RP402K552x
1
0
0
1
10
Output Current IOUT [mA]
1
100
10
Output Current IOUT [mA]
100
[MODE Pin]
It is recommended that the MODE pin (“H”) be connected to the VOUT pin or the VIN pin to ensure stability;
however, connecting the MODE pin to the VOUT pin can ensure better stability. Please note that the MODE pin
is pulled down by a resistor inside the device, so a current flows through the pull-down resistor to consume
power. Connecting the MODE pin to GND or using it in the open state is another option.
Bypass Mode Application Example (RP402xxxxC/ D/ G/ H)
The RP402xxxxC/ D/ G/ H is available in bypass mode when CE = L. The shown below is the application
example of the device in bypass mode. In this application, when the main system is not in sleep, the
RP402xxxxC/ D/ G/ H is set to active state to supply power to the main system and RTC. When the main
system is in sleep, the RP 402xxxxC/ D/ G/ H is set to standby state to supply power to RTC in bypass mode.
Using the device in the bypass mode can reduce the power loss and the consumption of battery. Also, using
the device in bypass mode can eliminate external components for short-circuit protection.
L
C1
LX
VIN
Main System
(VSET)
RP402xxxx
C/ D/ G/ H
VOUT
CE Control
CE
MODE
GND
18
C2
VOUT
RTC
(A small amount of
current is required.)
RP402x
NO.EA-317-150121
Regulation Operation at VIN > VOUT
The RP402x regulates the output voltage to the set output voltage even when the input voltage is higher than
the set output voltage. Please note that this regulation operation decreases the efficiency and the maximum
output current driving ability. The maximum output current driving ability can be different due to the set output
voltage, the input voltage and the ambient temperature.
The following is the switching condition (Typ.) from step-up operation to the step-down regulation.
VIN ≤ VOUT−150 mV: Step-down regulation → Step-up operation
VIN > VOUT−100 mV: Step-up operation → Step-down regulation
ILX vs.Input Voltage
RP402xxxxx
Output Current vs.Input Voltage
RP402xxxxx
VOUT = 3.3V
600
450
550
400
500
350
300
ILX [mA]
Output Current IOUT [mA]
VOUT = 3.3V
500
250
200
450
400
350
150
300
100
250
50
200
0
3
3.5
4
4.5
5
3
3.5
4
4.5
5
5.5
Input Voltage VIN [V]
Input Voltage VIN [V]
Output Voltage Setting for RP402K00xx
The RP402K00xx can set the output voltage freely by the external divider resistors using the following equation.
Output Voltage = VFB × (R1 + R2) / R2
(VFB = 1.0 V)
Zero Input Complete Shutdown at VIN = 0 V
The RP402x provides a zero input complete shutdown function that allows the device to shut down the output
when VIN = 0 V or VIN = open. This function protects against reverse current flow from VOUT to VIN when a
voltage is applied to the VOUT pin while VIN = 0 V or VIN = open.
Overcurrent Protection
The RP402x incorporates a LX peak current limit circuit as the overcurrent protection circuit which controls the
duty of LX when the LX peak current (ILXPEAK) reaches typically 1.5 A.
Latch Type Protection (RP402xxxxA/ C/ E/ G)
The RP402xxxxA/ C/ E/ G provides a latch type protection circuit to latch the power MOSFET to the off state
in order to stop the DC/DC operation. To release the latch type protection, switch the CE pin from high to low
once and switch it back to high. Please note that the LX peak current (ILXPEAK) and the protection delay time
(tprot) are easily affected by the self-heating or heat radiation efficiency. The large reduction in input voltage
(VIN) or the unstable input voltage caused by short-circuit may affect the protection operation or protection
delay time.
19
RP402x
NO.EA-317-150121
Short-circuit Protection
The RP402x provides a short-circuit protection circuit which stops the switching operation when a short-circuit
is detected. If a short-circuit state is released after a preset time, the device performs stable restart with softstart operation.
Overvoltage Protection
The RP402x provides an overvoltage lockout (OVLO) circuit for monitoring the input pin voltage and an
overvoltage protection (OVP) circuit for monitoring the output pin voltage. These circuits stops the switching
operation when an overvoltage is detected. If the output voltage is dropped below the set output voltage when
OVLO is released, the output voltage will be boosted to the set output voltage.
20
RP402x
NO.EA-317-150121
OUTPUT CURRENT AND SELECTION OF EXTERNAL COMPONENTS
Operation of Step-up DC/DC Converter and Output Current
Basic Circuit
Pch Tr.
Coil(L)
IOUT
VIN
VOUT
Nch Tr.
CL
GND
The inductor current (IL) flowing through the inductor (L)
Discontinuous Mode
Continuous Mode
IL max
IL
IL
IL max
IL min
tf
IL min
Iconst
t
ton
t
ton
toff
t =1/fosc
toff
t =1/fosc
A PWM control type step-up DC/DC converter has two operation modes characterized by the continuity of
inductor current: discontinuous current mode and continuous current mode.
The voltage applied to the inductor L, when transistor is ON, is described as “VIN”. So, the current is described
as “VIN x t / L”.
Therefore, the electric power (PON) supplied from the input side, while transistor is ON, is described as follows:
PON = ∫
ton
0
VIN 2 × t/L dt ··························································································· Equation 1
21
RP402x
NO.EA-317-150121
In step-up circuit, power source supplies the electric power (POFF) even while transistor is OFF. The input
current supplied by power source while transistor is OFF is described as “(VOUT − VIN) x t / L”. Therefore, the
electric power POFF is described as follows:
POFF = ∫
tf
0
VIN × (VOUT − VIN) × t/L dt ······································································· Equation 2
The time of which the inductance L releases the saved energy is described as “tf”. Therefore, the average
electric power (PAV) in a cycle is described as follows:
PAV = 1/(ton + toff) × { ∫
ton
0
VIN 2 × t/L dt + ∫
tf
0
VIN × (VOUT − VIN) × t/L dt} ···················· Equation 3
In PWM control, when “tf = toff”, the inductor current becomes continuous, so the switching regulator operation
turns into continuous current mode. The current deviation between On time and Off time is equal under steadystate condition of continuous current mode as follows:
VIN x ton/ L = (VOUT − VIN) x toff / L ··············································································· Equation 4
The electric power (PAV) is equal to the output voltage (VOUT ξ IOUT). Therefore, IOUT is as follows:
IOUT = fosc x VIN2 x ton2 / {2 x L (VOUT - VIN)} = VIN2 x ton / (2 x L x VOUT) ································ Equation 5
When IOUT becomes more than VIN × ton × toff / (2 × L × (ton + toff)), the inductor current becomes continuous,
so the switching regulator operation turns into continuous current mode. The continuous inductor current is
described as ICONST, so IOUT is described as follows:
IOUT = fosc x VIN2 x ton2 / (2 x L (VOUT − VIN)) + VIN x Iconst / VOUT ········································ Equation 6
The peak current (ILmax) flowing through the inductor is described as follows:
ILmax = Iconst + VIN x ton / L ····················································································· Equation 7
Put Equation 4 into Equation 6 to solve ILmax. ILmax is described as follows:
ILmax = VOUT / VIN x IOUT + VIN x ton / (2 x L) ·································································· Equation 8
However, ton = (1 − VIN / VOUT) / fosc. The peak current is more than IOUT.
Please consider ILmax when setting conditions of input and output, as well as selecting the external
components. The peak current in the discontinuous current mode in Equation 7 can be calculated by Iconst
= 0.
Please note: The above calculation formulas are based on the ideal operation of the device in continuous
mode. The loss caused by the external components and the built-in Lx switch are not included. Please use the
peak current in Equation 8 as a reference when selecting an inductor.
22
RP402x
NO.EA-317-150121
TIMING CHART
Soft-start Operation and Latch-type Protection Operation
Input
Voltage
CE
Voltage
Output
Current
1.60V (Typ.)
Output
Voltage
LX
Voltage
tprot
RP402xxx1x 3.3ms (Typ.)
RP402xxx2x 4.1ms (Typ.)
0.5ms (Typ.)
Standby
*1
*2
Low-Boost
Mode
Soft Start Period
VFM Mode*1
PWM Mode
LX-Peak
Current
Limit
Latch Protect*2
Only for RP402xxx1x (MODE = ”L”)
Only for RP402xxxxA/ C/ E/ G
< Start-up >
When CE is changed from ”L” to ”H”, DC/DC converter starts up the operation. The RP402x has Low-Boost
mode which can start up with low voltage such as 0.7 V. The DC/DC boosts up with Low-Boost mode until the
output voltage reaches to typically 1.6 V. When the output voltage becomes more than or equal to typically 1.6
V, the soft-start operation starts in order to control inrush current. The DC/DC boosts up the output voltage
until it reaches to the setting output voltage.
23
RP402x
NO.EA-317-150121
Please note: During Low-Boost mode, the oscillator frequency is dropped, so the step-up ability is low
compared to the normal operation mode. Please pay attention to the step-up ratio and the load current. Softstart time depends on “set output voltage”, “input voltage”, “ambient temperature”, and “load current”.
Soft Start Period vs.Input Voltage
RP402xxxxx
RL = 5.5kΩ
( Ta = 25°C )
100.0
Soft Start Period vs.Ta
RP402x33xx
1.0
VOUT = 3.3V
VIN = 1.8V
RL = 5.5kΩ
0.9
VSET=1.8V
VSET=3.3V
VSET=5.5V
1.0
Soft-start Time [ms]
Soft-start Time [ms]
0.8
10.0
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.1
0.0
0
24
1
3
2
Input Voltage VIN [V]
4
5
-50
-25
0
25
Ta [℃]
50
75
100
RP402x
NO.EA-317-150121
PACKAGE INFORMATION
POWER DISSIPATION (DFN(PLP)2020-8)
Power Dissipation (PD) of the package is dependent on PCB material, layout, and environmental conditions.
The following conditions are used in this measurement.
Measurement Conditions
Standard Land Pattern
Environment
Board Material
Mounting on Board (Wind Velocity = 0 m/s)
Glass Cloth Epoxy Plastic (Double-sided)
Board Dimensions
40 mm x 40 mm x 1.6 mm
Copper Ratio
Top side: Approx. 50%, Back side: Approx. 50%
Through-holes
φ 0.54 mm x 30 pcs
Measurement Result
(Ta = 25°C, Tjmax = 125°C)
Standard Land Pattern
Power Dissipation
880 mW
Thermal Resistance
θja = (125 − 25°C) / 0.88 W = 114°C/W
40
1000
880
800
On Board
600
40
Power Dissipation PD (mW)
1200
400
200
0
0
25
50
75 85 100
125
150
Ambient Temperature (°C)
Power Dissipation vs. Ambient Temperature
IC Mount Area (Unit: mm)
Measurement Board Pattern
25
RP402x
PACKAGE DIMENSIONS (DFN(PLP)2020-8)
A
1.8±0.1
B
2.00
5
8
0.25±0.1
NO.EA-317-150121
X4
2.00
1.0±0.1
∗
0.05
C0.2
4
1
0.6MAX.
0.5
0.05 S
0.05 M AB
Bottom View
0.05min
S
0.25±0.1
0.25±0.1
INDEX
(Unit: mm)
∗ The tab on the bottom of the package enhances thermal performance and is electrically
connected to GND (substrate level). It is recommended that the tab be connected to the
ground plane on the board, or otherwise be left floating.
DFN(PLP)2020-8 Package Dimensions
MARK SPECIFICATION (DFN(PLP)2020-8)
: Product Code … Refer to MARK SPECIFICATION TABLE DFN(PLP)2020-8
: Lot Number … Alphanumeric Serial Number
8
7
6
5
1
2
3
4
DFN(PLP)2020-8 Mark Specification
26
RP402x
NO.EA-317-150121
MARK SPECIFICATION TABLE (DFN(PLP)2020-8)
RP402Kxxxx Mark Specification Table
Product Name
Product Name
RP402K181A
EB18
RP402K182A
RP402K191A
EB19
RP402K192A
RP402K201A
EB20
RP402K202A
RP402K211A
EB21
RP402K212A
RP402K221A
EB22
RP402K222A
RP402K231A
EB23
RP402K232A
RP402K241A
EB24
RP402K242A
RP402K251A
EB25
RP402K252A
RP402K261A
EB26
RP402K262A
RP402K271A
EB27
RP402K272A
RP402K281A
EB28
RP402K282A
RP402K291A
EB29
RP402K292A
RP402K301A
EB30
RP402K302A
RP402K311A
EB31
RP402K312A
RP402K321A
EB32
RP402K322A
RP402K331A
EB33
RP402K332A
RP402K341A
EB34
RP402K342A
RP402K351A
EB35
RP402K352A
RP402K361A
EB36
RP402K362A
RP402K371A
EB37
RP402K372A
RP402K381A
EB38
RP402K382A
RP402K391A
EB39
RP402K392A
RP402K401A
EB40
RP402K402A
RP402K411A
EB41
RP402K412A
RP402K421A
EB42
RP402K422A
RP402K431A
EB43
RP402K432A
RP402K441A
EB44
RP402K442A
RP402K451A
EB45
RP402K452A
RP402K461A
EB46
RP402K462A
RP402K471A
EB47
RP402K472A
RP402K481A
EB48
RP402K482A
RP402K491A
EB49
RP402K492A
RP402K501A
EB50
RP402K502A
RP402K511A
EB51
RP402K512A
RP402K521A
EB52
RP402K522A
RP402K531A
EB53
RP402K532A
RP402K541A
EB54
RP402K542A
RP402K551A
EB55
RP402K552A
EC18
EC19
EC20
EC21
EC22
EC23
EC24
EC25
EC26
EC27
EC28
EC29
EC30
EC31
EC32
EC33
EC34
EC35
EC36
EC37
EC38
EC39
EC40
EC41
EC42
EC43
EC44
EC45
EC46
EC47
EC48
EC49
EC50
EC51
EC52
EC53
EC54
EC55
Product Name
RP402K181B
RP402K191B
RP402K201B
RP402K211B
RP402K221B
RP402K231B
RP402K241B
RP402K251B
RP402K261B
RP402K271B
RP402K281B
RP402K291B
RP402K301B
RP402K311B
RP402K321B
RP402K331B
RP402K341B
RP402K351B
RP402K361B
RP402K371B
RP402K381B
RP402K391B
RP402K401B
RP402K411B
RP402K421B
RP402K431B
RP402K441B
RP402K451B
RP402K461B
RP402K471B
RP402K481B
RP402K491B
RP402K501B
RP402K511B
RP402K521B
RP402K531B
RP402K541B
RP402K551B
ED18
ED19
ED20
ED21
ED22
ED23
ED24
ED25
ED26
ED27
ED28
ED29
ED30
ED31
ED32
ED33
ED34
ED35
ED36
ED37
ED38
ED39
ED40
ED41
ED42
ED43
ED44
ED45
ED46
ED47
ED48
ED49
ED50
ED51
ED52
ED53
ED54
ED55
VSET
1.8 V
1.9 V
2.0 V
2.1 V
2.2 V
2.3 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.1 V
5.2 V
5.3 V
5.4 V
5.5 V
27
RP402x
NO.EA-317-150121
MARK SPECIFICATION TABLE (DFN(PLP)2020-8) (continued)
RP402Kxxxx Mark Specification Table
Product Name
Product Name
RP402K182B
EE18
RP402K181C
RP402K192B
EE19
RP402K191C
RP402K202B
EE20
RP402K201C
RP402K212B
EE21
RP402K211C
RP402K222B
EE22
RP402K221C
RP402K232B
EE23
RP402K231C
RP402K242B
EE24
RP402K241C
RP402K252B
EE25
RP402K251C
RP402K262B
EE26
RP402K261C
RP402K272B
EE27
RP402K271C
RP402K282B
EE28
RP402K281C
RP402K292B
EE29
RP402K291C
RP402K302B
EE30
RP402K301C
RP402K312B
EE31
RP402K311C
RP402K322B
EE32
RP402K321C
RP402K332B
EE33
RP402K331C
RP402K342B
EE34
RP402K341C
RP402K352B
EE35
RP402K351C
RP402K362B
EE36
RP402K361C
RP402K372B
EE37
RP402K371C
RP402K382B
EE38
RP402K381C
RP402K392B
EE39
RP402K391C
RP402K402B
EE40
RP402K401C
RP402K412B
E E4 1
RP402K411C
RP402K422B
EE42
RP402K421C
RP402K432B
EE43
RP402K431C
RP402K442B
EE44
RP402K441C
RP402K452B
EE45
RP402K451C
RP402K462B
EE46
RP402K461C
RP402K472B
EE47
RP402K471C
RP402K482B
EE48
RP402K481C
RP402K492B
EE49
RP402K491C
RP402K502B
EE50
RP402K501C
RP402K512B
EE51
RP402K511C
RP402K522B
EE52
RP402K521C
RP402K532B
EE53
RP402K531C
RP402K542B
EE54
RP402K541C
RP402K552B
EE55
RP402K551C
28
EF18
EF19
EF20
EF21
EF22
EF23
EF24
EF25
EF26
EF27
EF28
EF29
EF30
EF31
EF32
E F 33
EF34
EF35
EF36
EF37
EF38
EF39
EF40
EF41
EF42
EF43
EF44
EF45
EF46
EF47
EF48
EF49
EF50
EF51
EF52
EF53
EF54
EF55
Product Name
RP402K181D
RP402K191D
RP402K201D
RP402K211D
RP402K221D
RP402K231D
RP402K241D
RP402K251D
RP402K261D
RP402K271D
RP402K281D
RP402K291D
RP402K301D
RP402K311D
RP402K321D
RP402K331D
RP402K341D
RP402K351D
RP402K361D
RP402K371D
RP402K381D
RP402K391D
RP402K401D
RP402K411D
RP402K421D
RP402K431D
RP402K441D
RP402K451D
RP402K461D
RP402K471D
RP402K481D
RP402K491D
RP402K501D
RP402K511D
RP402K521D
RP402K531D
RP402K541D
RP402K551D
EG18
EG19
EG20
EG21
EG22
EG23
EG24
EG25
EG26
EG27
EG28
EG29
EG30
EG31
EG32
EG33
EG34
EG35
EG36
EG37
EG38
EG39
EG40
EG41
EG42
EG43
EG44
EG45
EG46
EG47
EG48
EG49
EG50
EG51
EG52
EG53
EG54
EG55
VSET
1.8 V
1.9 V
2.0 V
2.1 V
2.2 V
2.3 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.1 V
5.2 V
5.3 V
5.4 V
5.5 V
RP402x
NO.EA-317-150121
RP402K00xx Mark Specification Table (Adjustable Output Voltage Type)
Product Name
VSET
RP402K001A
EH01
―
RP402K002A
EH02
―
RP402K001B
EH03
―
RP402K002B
EH04
―
RP402K001C
EH05
―
RP402K001D
EH06
―
29
RP402x
NO.EA-317-150121
POWER DISSIPATION (SOT-23-5)
Power Dissipation (PD) of the package is dependent on PCB material, layout, and environmental conditions.
The following conditions are used in this measurement. This data is taken from the SOT-23-6 package.
Measurement Conditions
Standard Land Pattern
Environment
Mounting on Board (Wind Velocity = 0 m/s)
Board Material
Glass Cloth Epoxy Plastic (Double-sided)
Board Dimensions
40 mm x 40 mm x 1.6 mm
Copper Ratio
Top side: Approx. 50%, Back side: Approx. 50%
Through-holes
φ: 0.5 mm x 44 pcs
Measurement Result
(Ta = 25°C, Tjmax = 125°C)
Standard Land Pattern
Free Air
Power Dissipation
420 mW
250 mW
Thermal Resistance
θja = (125 − 25°C) / 0.42W = 238°C/W
400°C/W
Power Dissipation PD (mW)
600
500
On Board
420
400
300
Free Air
250
200
100
0
0
25
50
75 85 100
125
150
Ambient Temperature (°C)
Power Dissipation vs. Ambient Temperature
30
Measurement Board Pattern
RP402x
NO.EA-317-150121
PACKAGE DIMENSIONS (SOT-23-5)
2.9±0.2
1.1±0.1
1.9±0.2
0.8±0.1
(0.95)
4
1
2
0～0.1
0.2min.
+0.2
1.6-0.1
5
2.8±0.3
(0.95)
3
+0.1
0.15-0.05
0.4±0.1
Unit : mm
SOT-23-5 Package Dimensions
MARK SPECIFICATION (SOT-23-5)
: Product Code … Refer to MARK SPECIFICATION TABLE (SOT-23-5)
: Lot Number … Alphanumeric Serial Number
5
4
1
2
3
SOT-23-5 Mark Specification
31
RP402x
NO.EA-317-150121
MARK SPECIFICATION TABLE (SOT-23-5)
RP402N Mark Specification Table
32
Product Name
Product Name
VSET
RP402N181E
RP402N191E
RP402N201E
RP402N211E
RP402N221E
RP402N231E
RP402N241E
RP402N251E
RP402N261E
RP402N271E
RP402N281E
RP402N291E
RP402N301E
RP402N311E
RP402N321E
RP402N331E
RP402N341E
RP402N351E
RP402N361E
RP402N371E
RP402N381E
RP402N391E
RP402N401E
RP402N411E
RP402N421E
RP402N431E
RP402N441E
RP402N451E
RP402N461E
RP402N471E
RP402N481E
RP402N491E
RP402N501E
RP402N511E
RP402N521E
RP402N531E
RP402N541E
RP402N551E
BA0
BA1
BA2
BA3
BA4
BA5
BA6
BA7
BA8
BA9
BB0
BB1
BB2
BB3
BB4
BB5
BB6
BB7
BB8
BB9
BC0
BC1
BC2
BC3
BC4
BC5
BC6
BC7
BC8
BC9
BD0
BD1
BD2
BD3
BD4
BD5
BD6
BD7
RP402N181F
RP402N191F
RP402N201F
RP402N211F
RP402N221F
RP402N231F
RP402N241F
RP402N251F
RP402N261F
RP402N271F
RP402N281F
RP402N291F
RP402N301F
RP402N311F
RP402N321F
RP402N331F
RP402N341F
RP402N351F
RP402N361F
RP402N371F
RP402N381F
RP402N391F
RP402N401F
RP402N411F
RP402N421F
RP402N431F
RP402N441F
RP402N451F
RP402N461F
RP402N471F
RP402N481F
RP402N491F
RP402N501F
RP402N511F
RP402N521F
RP402N531F
RP402N541F
RP402N551F
BE0
BE1
BE2
BE3
BE4
BE5
BE6
BE7
BE8
BE9
BF0
BF1
BF2
BF3
BF4
BF5
BF6
BF7
BF8
BF9
BG0
BG1
BG2
BG3
BG4
BG5
BG6
BG7
BG8
BG9
BH0
BH1
BH2
BH3
BH4
BH5
BH6
BH7
1.8 V
1.9 V
2.0 V
2.1 V
2.2 V
2.3 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.1 V
5.2 V
5.3 V
5.4 V
5.5 V
RP402x
NO.EA-317-150121
MARK SPECIFICATION TABLE (SOT-23-5) (continued)
RP402N Mark Specification Table
Product Name
Product Name
VSET
RP402N181G
RP402N191G
RP402N201G
RP402N211G
RP402N221G
RP402N231G
RP402N241G
RP402N251G
RP402N261G
RP402N271G
RP402N281G
RP402N291G
RP402N301G
RP402N311G
RP402N321G
RP402N331G
RP402N341G
RP402N351G
RP402N361G
RP402N371G
RP402N381G
RP402N391G
RP402N401G
RP402N411G
RP402N421G
RP402N431G
RP402N441G
RP402N451G
RP402N461G
RP402N471G
RP402N481G
RP402N491G
RP402N501G
RP402N511G
RP402N521G
RP402N531G
RP402N541G
RP402N551G
BJ0
BJ1
BJ2
BJ3
BJ4
BJ5
BJ6
BJ7
BJ8
BJ9
BK0
BK1
BK2
BK3
BK4
BK5
BK6
BK7
BK8
BK9
BL0
BL1
BL2
BL3
BL4
BL5
BL6
BL7
BL8
BL9
BM0
BM1
BM2
BM3
BM4
BM5
BM6
BM7
RP402N181H
RP402N191H
RP402N201H
RP402N211H
RP402N221H
RP402N231H
RP402N241H
RP402N251H
RP402N261H
RP402N271H
RP402N281H
RP402N291H
RP402N301H
RP402N311H
RP402N321H
RP402N331H
RP402N341H
RP402N351H
RP402N361H
RP402N371H
RP402N381H
RP402N391H
RP402N401H
RP402N411H
RP402N421H
RP402N431H
RP402N441H
RP402N451H
RP402N461H
RP402N471H
RP402N481H
RP402N491H
RP402N501H
RP402N511H
RP402N521H
RP402N531H
RP402N541H
RP402N551H
BN0
BN1
BN2
BN3
BN4
BN5
BN6
BN7
BN8
BN9
BP0
BP1
BP2
BP3
BP4
BP5
BP6
BP7
BP8
BP9
BQ0
BQ1
BQ2
BQ3
BQ4
BQ5
BQ6
BQ7
BQ8
BQ9
BR0
BR1
BR2
BR3
BR4
BR5
BR6
BR7
1.8 V
1.9 V
2.0 V
2.1 V
2.2 V
2.3 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.1 V
5.2 V
5.3 V
5.4 V
5.5 V
33
RP402x
NO.EA-317-150121
TYPICAL CHARACTERISTICS
Note: Typical Characteristics are intended to be used as reference data; they are not guaranteed.
1) Output Voltage vs. Output Current
RP402x181x
MODE = "L" ( VFM / PWM )
1.9
RP402K181x
MODE = "H" ( Normal PWM )
(Ta = 25°C)
1.9
Input Voltage
Input Voltage
1.88
0.7V
1.86
1.84
0.8V
1.82
1.8
1.0V
1.78
1.2V
1.76
Output Voltage VOUT (V)
Output Voltage VOUT (V)
1.88
(Ta = 25°C)
1.74
0.7V
1.86
1.84
0.8V
1.82
1.8
1.0V
1.78
1.2V
1.76
1.74
1.5V
1.72
1.5V
1.72
1.7
1.7
0.1
1
10
100
1000
Output Current IOUT(mA)
RP402K182x
( Forced PWM )
1.9
0.1
10000
1
10
100
1000
Output Current IOUT(mA)
10000
(Ta = 25°C)
Input Voltage
Output Voltage VOUT (V)
1.88
0.7V
1.86
1.84
0.8V
1.82
1.8
1.0V
1.78
1.2V
1.76
1.74
1.5V
1.72
1.7
0.1
1
10
100
1000
Output Current IOUT(mA)
10000
RP402x331x
MODE = "L" ( VFM / PWM )
RP402K331x
MODE = "H" ( Normal PWM )
(Ta = 25°C)
3.5
0.7V
3.4
0.8V
3.35
1.2V
1.5V
3.3
1.8V
3.25
2.0V
3.2
2.5V
3.15
3.0V
3.1
(Ta = 25°C)
Input Voltage
3.45
Output Voltage VOUT (V)
Output Voltage VOUT (V)
3.45
0.7V
3.4
0.8V
3.35
1.2V
1.5V
3.3
1.8V
3.25
2.0V
3.2
2.5V
3.15
3.0V
3.1
0.1
34
3.5
Input Voltage
1
10
100
1000
Output Current IOUT(mA)
10000
0.1
1
10
100
1000
Output Current IOUT(mA)
10000
RP402x
NO.EA-317-150121
RP402K332x
( Forced PWM )
Output Voltage VOUT (V)
3.5
(Ta = 25°C)
Input Voltage
3.45
0.7V
3.4
0.8V
3.35
1.2V
1.5V
3.3
1.8V
3.25
2.0V
3.2
2.5V
3.15
3.0V
3.1
0.1
1
10
100
1000
Output Current IOUT(mA)
RP402x501x
MODE = "L" ( VFM / PWM )
RP402K501x
MODE = "H" ( Normal PWM )
(Ta = 25°C)
5.15
0.8V
5.1
1.2V
5.05
1.8V
2.4V
5
2.7V
4.95
3.2V
4.9
3.7V
4.85
4.2V
4.8
(Ta = 25°C)
Input Voltage
5.15
0.8V
5.1
1.2V
5.05
1.8V
2.4V
5
2.7V
4.95
3.2V
4.9
3.7V
4.85
4.2V
4.8
0.1
1
10
100
1000
Output Current IOUT(mA)
RP402K502x
( Forced PWM )
5.2
Output Voltage VOUT (V)
5.2
Input Voltage
Output Voltage VOUT (V)
Output Voltage VOUT (V)
5.2
10000
0.1
10000
1
10
100
1000
Output Current IOUT(mA)
10000
(Ta = 25°C)
Input Voltage
5.15
0.8V
5.1
1.2V
5.05
1.8V
2.4V
5
2.7V
4.95
3.2V
4.9
3.7V
4.85
4.2V
4.8
0.1
1
10
100
1000
Output Current IOUT(mA)
10000
35
RP402x
NO.EA-317-150121
RP402x551x
MODE = "L" ( VFM / PWM )
5.8
Input Voltage
1.2V
1.8V
5.6
2.4V
5.5
2.7V
3.2V
5.4
3.7V
4.2V
5.3
5.7
1.2V
1.8V
5.6
2.4V
5.5
2.7V
3.2V
5.4
3.7V
4.2V
5.3
4.8V
4.8V
5.2
5.2
0.1
1
10
100
1000
Output Current IOUT(mA)
RP402K552x
( Forced PWM )
5.8
Output Voltage VOUT (V)
Input Voltage
0.8V
0.8V
5.7
Output Voltage VOUT (V)
Output Voltage VOUT (V)
5.8
RP402K551x
MODE = "H" ( Nomal PWM )
(Ta = 25°C)
(Ta = 25°C)
0.1
10000
1
10
100
1000
Output Current IOUT(mA)
10000
(Ta = 25°C)
Input Voltage
0.8V
5.7
1.2V
5.6
1.8V
2.4V
5.5
2.7V
3.2V
5.4
3.7V
4.2V
5.3
4.8V
5.2
0.1
1
10
100
1000
Output Current IOUT(mA)
10000
2) Efficiency vs. Output Current
RP402x181x
MODE = "L" ( VFM / PWM )
100
RP402K181x
MODE = "H" ( Normal PWM )
(Ta = 25°C)
100
Input Voltage
0.7V
70
0.8V
60
50
1.0V
40
1.2V
30
0.7V
80
Efficiency η(%)
Efficiency η(%)
80
70
0.8V
60
50
1.0V
40
30
1.2V
20
20
1.5V
10
36
Input Voltage
90
90
0
0.01
(Ta = 25°C)
0.1
10
100
1
Output Current IOUT(mA)
1000
1.5V
10
0
0.01
0.1
1
10
100
Output Current IOUT(mA)
1000
RP402x
NO.EA-317-150121
RP402K182x
( Forced PWM )
100
(Ta = 25°C)
Input Voltage
90
0.7V
Efficiency η(%)
80
70
60
0.8V
50
40
1.0V
30
20
1.2V
10
0
0.01
0.1
1
10
100
Output Current IOUT(mA)
RP402x331x
MODE = "L" ( VFM / PWM )
100
1000
RP402K331x
MODE = "H" ( Normal PWM )
(Ta = 25°C)
100
Input Voltage
90
60
1.5V
50
Efficiency η(%)
Efficiency η(%)
1.2V
0.7V
80
80
70
Input Voltage
90
0.7V
0.8V
(Ta = 25°C)
0.8V
70
1.2V
60
1.5V
50
40
1.8V
40
1.8V
30
2.0V
30
2.0V
20
2.5V
20
2.5V
10
3.0V
10
3.0V
0
0.01
0.1
1
10
100
Output Current IOUT(mA)
RP402K332x
( Forced PWM )
100
0
0.01
1000
0.1
1
10
100
Output Current IOUT(mA)
1000
(Ta = 25°C)
Input Voltage
90
0.7V
0.8V
70
60
1.2V
50
1.5V
40
1.8V
30
20
2.0V
10
2.5V
0
0.01
0.1
1
10
100
Output Current IOUT(mA)
RP402x501x
MODE = "L" ( VFM / PWM )
100
1000
100
Input Voltage
90
1.8V
60
2.4V
50
Input Voltage
0.8V
80
1.2V
70
(Ta = 25°C)
90
0.8V
80
Efficiency η(%)
RP402K501x
MODE = "H" ( Normal PWM )
(Ta = 25°C)
Efficiency η(%)
Efficiency η(%)
80
1.2V
70
1.8V
60
2.4V
50
40
2.7V
40
2.7V
30
3.2V
30
3.2V
20
3.7V
20
3.7V
10
4.2V
10
4.2V
0
0.01
0.1
1
10
100
Output Current IOUT(mA)
1000
0
0.01
0.1
1
10
100
Output Current IOUT(mA)
1000
37
RP402x
NO.EA-317-150121
RP402K502x
( Forced PWM )
100
(Ta = 25°C)
Input Voltage
90
0.8V
1.2V
70
1.8V
60
2.4V
50
40
2.7V
30
3.2V
20
3.7V
10
4.2V
0
0.01
0.1
100
10
1
Output Current IOUT(mA)
RP402x551x
MODE = "L" ( VFM / PWM )
Efficiency η(%)
100
1000
(Ta = 25°C)
Input Voltage
0.8V
90
0.8V
80
1.2V
80
1.2V
70
1.8V
70
1.8V
60
2.4V
60
2.4V
50
2.7V
50
2.7V
40
3.2V
40
3.2V
30
3.7V
30
3.7V
20
4.2V
20
4.2V
10
4.8V
10
4.8V
0.1
1
10
100
Output Current IOUT(mA)
RP402K552x
( Forced PWM )
100
0
0.01
1000
(Ta = 25°C)
Input Voltage
90
0.8V
80
Efficiency η(%)
100
Input Voltage
90
0
0.01
1.2V
70
1.8V
60
2.4V
50
2.7V
40
3.2V
30
20
3.7V
10
4.2V
0
0.01
38
RP402K551x
MODE = "H" ( Normal PWM )
(Ta = 25°C)
0.1
1
10
100
Output Current IOUT(mA)
1000
Efficiency η(%)
Efficiency η(%)
80
0.1
1
10
100
Output Current IOUT(mA)
1000
RP402x
NO.EA-317-150121
3) Standby Current vs. Ambient Temperature
RP402x33xC/D/G/H
RP402x33xA/B/E/F
VIN = 4.8V / VOUT = OPEN
5.0
5.0
4.5
4.5
4.0
4.0
Standby Current [µA]
Standby Current [µA]
VIN = 4.8V / VOUT = GND
3.5
3.0
2.5
2.0
1.5
3.5
3.0
2.5
2.0
1.5
1.0
1.0
0.5
0.5
0.0
0.0
-50
-25
0
25
50
75
100
Ta [°C]
-50
-25
0
25
50
75
100
Ta [°C]
4) Supply Current 1 vs. Ambient Temperature
RP402x33xx
VIN = VSET - 0.4V / VOUT = 0.95 × VSET
5.0
4.5
4.0
IDD1 [mA]
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-50
-25
0
25
50
75
100
Ta [°C]
5) Supply Current 2 vs. Ambient Temperature
RP402x331x
VIN = VSET - 0.4V / VOUT = VSET + 0.2V
30
25
IDD2 [µA]
20
15
10
5
0
-50
-25
0
25
50
75
100
Ta [°C]
39
RP402x
NO.EA-317-150121
6) Start-up vs. Ambient Temperature
RP402x33xx
( RL = 5.5kΩ )
Start-up Voltage [V]
0.8
0.75
0.7
0.65
0.6
-50
-25
0
50
25
75
100
Ta [°C]
7) Hold-on Voltage vs. Ambient Temperature
RP402x33xx
( RL = 5.5kΩ )
0.41
Hold-on Voltage [V]
0.39
0.37
0.35
0.33
0.31
0.29
0.27
0.25
-50
-25
0
25
50
75
100
Ta [°C]
8) Oscillator Frequency vs. Ambient Temperature
RP402K331x
MODE = "H" ( Normal PWM )
1400
1200
1350
1150
1300
1100
1250
1050
1200
1150
1000
950
1100
900
1050
850
1000
800
-50
-25
0
25
Ta [°C]
40
RP402K332x
( Forced PWM )
VIN = 1.5V
fosc [Hz]
fosc [Hz]
VIN = 1.5V
50
75
100
-50
-25
0
25
Ta [°C]
50
75
100
RP402x
NO.EA-317-150121
9) Maxduty vs. Ambient Temperature
RP402x33xx
100
90
80
Max duty [%]
70
60
50
40
30
20
10
0
-50
-25
0
25
50
75
100
Ta [°C]
10) Lx Current Limit vs. Duty
RP402xxxxx
(Ta = 25°C)
Lxpeak [mA]
2500
2300
RP402K001x (5.0V)
2100
RP402K001x (3.3V)
1900
RP402K001x (2.9V)
1700
RP402K001x (2.5V)
1500
RP402K001x (2.3V)
1300
RP402K001x (2.0V)
1100
RP402K001x (1.8V)
900
700
500
20
30
40
50
60
70
80
90
Duty [%]
11) Lx Current Limit vs. Ambient Temperature
RP402x33xx
VIN = 1.65V
2500
2300
2100
Lxpeak [mA]
1900
1700
1500
1300
1100
900
700
500
-50
-25
0
25
50
75
100
Ta [°C]
41
RP402x
NO.EA-317-150121
12) CE ”H” Input Voltage vs. Ambient Temperature
RP402xxxxx
0.8
0.7
VCEH [V]
0.6
0.5
0.4
0.3
0.2
-50
-25
0
25
50
75
100
Ta [°C]
13) MODE ”H” Input Voltage vs. Ambient Temperature
RP402Kxxxx
1.0
VMODEH [V]
0.8
0.6
0.4
0.2
0.0
-50
-25
0
25
50
75
100
Ta [°C]
14) Output Voltage vs. Ambient Temperature
RP402x33xx
VIN = 1.5V
3.40
Output Voltage VOUT [V]
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
-50
-25
0
25
Ta [°C]
42
50
75
100
RP402x
NO.EA-317-150121
15) Feedback Voltage vs. Ambient Temperature
RP402K00xx (VSET = 5.0V)
VIN = 3.0V
1.03
Feedback Voltage VFB [V]
1.02
1.01
1.00
0.99
0.98
0.97
-50
-25
0
25
50
75
100
Ta [°C]
16) Start-up Waveform (COUT = 20 μF)
RP402K331A
RP402K331A
VIN = 1.2V / IOUT = 1mA)
4
Output Voltage
Output Voltage
3
1
0
1.5
1
Inductor Current
0.5
Inductor Current ILX [A]
CE Input Voltage
2
Output Voltage VOUT /
CE Input Voltage [V]
3
Output Voltage VOUT /
CE Input Voltage [V]
(Ta = 25°C)
VIN = 1.8V / IOUT = 1mA)
CE Input Voltage
2
1
0
1.5
1
Inductor Current
0.5
0
0
-0.5
-0.5
-0.5
0
0.5
1
1.5
2
2.5
Time t [ms]
3
3.5
4
4.5
Inductor Current ILX [A]
4
(Ta = 25°C)
-0.5
0
0.5
1
1.5
2
Time t [ms]
43
RP402x
NO.EA-317-150121
17) Load Transient Response (COUT = 20 μF)
RP402x181x
MODE = "L" (VFM / PWM)
VIN = 0.9V
Output Current
1mA <-> 50mA
50
-20
0
20
40 60 80
Time t [μs]
1.75
1.7
Output Current
50mA <-> 1mA
50
-0.5
0
0.5
1
1.5
2
2.5
Time t [ms]
3
3.5
RP402K181x
MODE = "H" (Normal PWM)
VIN = 0.9V
(Ta = 25°C)
4
4.5
(Ta = 25°C)
1.9
1.85
1.75
1.7
Output Current
1mA <-> 50mA
50
-40
-20
0
20
40 60 80
Time t [μs]
RP402K182x
(Forced PWM)
VIN = 0.9V
Output Current IOUT [mA]
Output Voltage
1.8
Output Voltage VOUT [V]
1.85
Output Voltage
1.8
1.75
1.7
Output Current
50mA <-> 1mA
50
Output Current IOUT [mA]
1.9
0
0
100 120 140 160
-0.5
0
0.5
1
RP402K182x
(Forced PWM)
VIN = 0.9V
(Ta = 25°C)
1.5
2
2.5
Time t [ms]
3
3.5
4
4.5
(Ta = 25°C)
1.9
1.9
1.85
1.75
1.7
Output Current
1mA <-> 50mA
50
-40
-20
0
20
40 60 80
Time t [μs]
0
100 120 140 160
Output Current IOUT [mA]
Output Voltage
1.8
Output Voltage VOUT [V]
1.85
Output Voltage
1.8
1.75
1.7
Output Current
50mA <-> 1mA
50
-40
-20
0
20
40 60 80
Time t [ms]
0
100 120 140 160
Output Current IOUT [mA]
Output Voltage VOUT [V]
1.8
0
0
100 120 140 160
RP402K181x
MODE = "H" (Normal PWM)
VIN = 0.9V
Output Voltage VOUT [V]
1.7
Output Current IOUT [mA]
Output Voltage VOUT [V]
1.75
-40
Output Voltage
1.85
1.8
Output Current IOUT [mA]
Output Voltage
1.85
Output Voltage VOUT [V]
(Ta = 25°C)
1.9
1.9
44
RP402x181x
MODE = "L" (VFM / PWM)
VIN = 0.9V
(Ta = 25°C)
RP402x
NO.EA-317-150121
RP402x331x
MODE = "L" (VFM / PWM)
VIN = 1.8V
(Ta = 25°C)
3.2
3.1
Output Current
1mA <-> 200mA
200
-40
-20
0
20
40 60 80
Time t [μs]
0
100 120 140 160
RP402K331x
MODE = "H" (Normal PWM)
VIN = 1.8V
3.3
3.2
3.1
Output Current
200mA <-> 1mA
200
0
-0.5
(Ta = 25°C)
0
0.5
1
1.5
2
2.5
Time t [ms]
3
3.5
4
RP402K331x
MODE = "H" (Normal PWM)
VIN = 1.8V
4.5
(Ta = 25°C)
3.6
3.6
3.5
3.2
3.1
Output Current
1mA <-> 200mA
200
-40
-20
0
20
40 60 80
Time t [μs]
3.3
3.2
3.1
Output Current
200mA <-> 1mA
200
0
100 120 140 160
RP402K332x
(Forced PWM)
VIN = 1.8V
Output Voltage
3.4
Output Current IOUT [mA]
3.3
Output Voltage VOUT [V]
3.5
Output Voltage
3.4
Output Current IOUT [mA]
0
-0.5
(Ta = 25°C)
0
0.5
1
1.5
2
2.5
Time t [ms]
3
3.5
4
RP402K332x
(Forced PWM)
VIN = 1.8V
4.5
(Ta = 25°C)
3.6
3.5
3.3
3.2
3.1
Output Current
1mA <-> 200mA
200
-40
-20
0
VIN = 3.7V
20
40 60 80
Time t [μs]
Output Current IOUT [mA]
Output Voltage
3.4
Output Voltage VOUT [V]
3.5
0
100 120 140 160
RP402K501x
MODE = "L" (VFM / PWM)
Output Voltage
3.4
3.3
3.2
3.1
Output Current
200mA <-> 1mA
200
-40
(Ta = 25°C)
-20
0
VIN = 3.7V
20
40 60 80
Time t [ms]
Output Current IOUT [mA]
3.6
0
100 120 140 160
RP402K501x
MODE = "L" (VFM / PWM)
(Ta = 25°C)
5.2
5.1
Output Voltage
4.95
4.9
4.85
Output Current
1mA <-> 250mA
250
-40
-20
0
20
40 60 80
Time t [μs]
0
100 120 140 160
Output Voltage VOUT [V]
5.15
5
Output Current IOUT [mA]
5.05
Output Voltage
5.1
5.05
5
4.95
4.9
Output Current
250mA <-> 1mA
4.85
250
Output Current IOUT [mA]
Output Voltage VOUT [V]
Output Voltage
3.4
Output Current IOUT [mA]
3.3
Output Voltage VOUT [V]
3.5
Output Voltage
3.4
Output Current IOUT [mA]
Output Voltage VOUT [V]
3.5
Output Voltage VOUT [V]
(Ta = 25°C)
3.6
3.6
Output Voltage VOUT [V]
RP402x331x
MODE = "L" (VFM / PWM)
VIN = 1.8V
0
-0.5
0
0.5
1
1.5
2
2.5
Time t [ms]
3
3.5
4
4.5
45
RP402x
NO.EA-317-150121
RP402K501x
MODE = "H" (Normal PWM)
VIN = 3.7V
(Ta = 25°C)
4.9
4.85
Output Current
1mA <-> 250mA
250
-40
-20
0
20
5.1
Output Voltage
5.05
5
4.95
4.9
Output Current
250mA <-> 1mA
4.85
250
0
100 120 140 160
40 60 80
Time t [μs]
RP402K502x
(Forced PWM)
VIN = 3.7V
Output Current IOUT [mA]
4.95
Output Current IOUT [mA]
5.15
Output Voltage
5
Output Voltage VOUT [V]
5.05
0
-0.5
(Ta = 25°C)
0
0.5
1
1.5
2
2.5
Time t [ms]
3
3.5
4
RP402K502x
(Forced PWM)
VIN = 3.7V
4.5
(Ta = 25°C)
5.2
5.1
5.15
4.95
4.9
4.85
Output Current
1mA <-> 250mA
250
-40
-20
0
20
40 60 80
Time t [μs]
Output Current IOUT [mA]
Output Voltage
5
Output Voltage VOUT [V]
5.05
Output Voltage
5.1
5.05
5
4.95
4.9
Output Current
250mA <-> 1mA
4.85
250
0
100 120 140 160
-40
-20
0
20
40 60 80
Time t [μs]
Output Current IOUT [mA]
Output Voltage VOUT [V]
(Ta = 25°C)
5.2
5.1
Output Voltage VOUT [V]
RP402K501x
MODE = "H" (Normal PWM)
VIN = 3.7V
0
100 120 140 160
18) 出力電圧波形 (COUT = 20 μF)
RP402x331x
MODE = "L" (VFM / PWM )
RP402x331x
MODE = "L" (VFM / PWM )
(Ta = 25°C)
VIN = 1.5V / IOUT = 100mA
3.3
LX Voltage
3.25
4
2
0
Output Voltage VOUT [V]
Output Voltage
3.35
LX Voltage VLX [V]
Output Voltage
3.32
3.3
LX Voltage
3.28
4
2
0
-2
0
1
2
3
4
-2
5
0
1
3
4
5
Time t [μs]
Time t [ms]
RP402K331x
MODE = "H" (Normal PWM )
RP402K331x
MODE = "H" (Normal PWM )
(Ta = 25°C)
3.4
(Ta = 25°C)
3.34
VIN = 1.5V / IOUT = 1mA
VIN = 1.5V / IOUT = 100mA
3.3
LX Voltage
3.25
4
2
Output Voltage VOUT [V]
Output Voltage
3.35
LX Voltage VLX [V]
Output Voltage VOUT [V]
2
Output Voltage
3.32
3.3
LX Voltage
3.28
4
2
0
0
-2
0
1
2
3
Time t [μs]
46
4
5
-2
0
1
2
3
Time t [μs]
4
5
LX Voltage VLX [V]
Output Voltage VOUT [V]
(Ta = 25°C)
3.34
VIN = 1.5V / IOUT = 1mA
LX Voltage VLX [V]
3.4
RP402x
NO.EA-317-150121
RP402K332x
(Forced PWM )
RP402K332x
(Forced PWM )
(Ta = 25°C)
3.4
VIN = 1.5V / IOUT = 100mA
LX Voltage
3.25
4
2
LX Voltage VLX [V]
3.3
Output Voltage VOUT [V]
Output Voltage
3.35
Output Voltage
3.32
3.3
LX Voltage
3.28
4
2
0
0
-2
0
1
3
2
-2
5
4
LX Voltage VLX [V]
VIN = 1.5V / IOUT = 1mA
Output Voltage VOUT [V]
(Ta = 25°C)
3.34
0
Time t [μs]
1
2
3
4
5
Time t [μs]
18) Mode Switching Waveform
RP402K331x
( Ta = 25°C )
VIN = 1.5V / IOUT = 1mA
Output Voltage VOUT [V]
2
0
MODE Input Voltage
3.4
3.35
3.3
MODE Input Voltage [V]
4
Output Voltage
3.25
3.2
-2
-1
0
4
2
3
Time t [ms]
1
5
7
6
8
19) Bypass Switch ON Resistance
RP402xxxxC/D/G/H
(Ta= 25°C)
300.0
Vin=2V
250.0
Vin=3.2V
Vin=3.7V
RONB [Ω]
200.0
Vin=4.2V
Vin=5.5V
150.0
100.0
50.0
0.0
0
1
2
3
4
5
6
VOUT [V]
47
RP402x
NO.EA-317-150121
20) PWM Operable Maximum Input Voltage vs. Ambient Temperature
RP402Kxx2x: (Forced PWM)
RP402Kxx1x: MODE = "H" (Normal PWM)
RP402K50xx
RP402K50xx
( IOUT = 10mA)
5
5
4.5
4.5
4
Input Voltage @ PWM [V]
Input Voltage @ PWM [V]
( IOUT = 1mA)
3.5
3
2.5
2
1.5
1
RP402K502x
RP402K501x
0.5
4
3.5
3
2.5
2
1.5
1
RP402K502x
RP402K501x
0.5
0
0
-50
-25
0
25
Ta [°C]
50
75
100
-50
RP402K50xx
( IOUT = 100mA)
5
Input Voltage @ PWM [V]
4.5
4
3.5
3
2.5
2
1.5
1
RP402K502x
RP402K501x
0.5
0
-50
-25
0
50
25
Ta [°C]
75
100
21) Reverse Current at VIN = 0 vs. Ambient Temperature
RP402xxxxx
VIN = 0V / VOUT = 5.5V
0.2
0.0
IINZERO [µA]
-0.2
-0.4
-0.6
-0.8
-1.0
-50
-25
0
25
Ta [°C]
48
50
75
100
-25
0
25
Ta [°C]
50
75
100
RP402x
NO.EA-317-150121
22) Latch Protection Delay Time vs. Ambient Temperature
RP402xxx1A/C/E/G
RP402xxx2A/C/E/G
VIN = 4.5V
4.0
4.8
3.8
4.6
3.6
4.4
tPROT [ms]
tPROT [ms]
VIN = 4.5V
3.4
4.2
3.2
4.0
3.0
3.8
2.8
3.6
-50
-25
0
25
Ta [°C]
50
75
100
-50
-25
0
25
50
75
100
Ta [°C]
49
1. The products and the product specifications described in this document are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before
deciding to use the products, please refer to Ricoh sales representatives for the latest information
thereon.
2. The materials in this document may not be copied or otherwise reproduced in whole or in part without
prior written consent of Ricoh.
3. Please be sure to take any necessary formalities under relevant laws or regulations before exporting or
otherwise taking out of your country the products or the technical information described herein.
4. The technical information described in this document shows typical characteristics of and example
application circuits for the products. The release of such information is not to be construed as a
warranty of or a grant of license under Ricoh's or any third party's intellectual property rights or any
other rights.
5. The products listed in this document are intended and designed for use as general electronic
components in standard applications (office equipment, telecommunication equipment, measuring
instruments, consumer electronic products, amusement equipment etc.). Those customers intending to
use a product in an application requiring extreme quality and reliability, for example, in a highly specific
application where the failure or misoperation of the product could result in human injury or death
(aircraft, spacevehicle, nuclear reactor control system, traffic control system, automotive and
transportation equipment, combustion equipment, safety devices, life support system etc.) should first
contact us.
6. We are making our continuous effort to improve the quality and reliability of our products, but
semiconductor products are likely to fail with certain probability. In order to prevent any injury to
persons or damages to property resulting from such failure, customers should be careful enough to
incorporate safety measures in their design, such as redundancy feature, fire containment feature and
fail-safe feature. We do not assume any liability or responsibility for any loss or damage arising from
misuse or inappropriate use of the products.
7. Anti-radiation design is not implemented in the products described in this document.
8. Please contact Ricoh sales representatives should you have any questions or comments concerning
the products or the technical information.
Halogen Free
Ricoh is committed to reducing the environmental loading materials in electrical devices
with a view to contributing to the protection of human health and the environment.
Ricoh has been providing RoHS compliant products since April 1, 2006 and Halogen-free products since
April 1, 2012.
http://www.e-devices.ricoh.co.jp/en/
Sales & Support Offices
RICOH ELECTRONIC DEVICES CO., LTD.
Higashi-Shinagawa Office (International Sales)
3-32-3, Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-8655, Japan
Phone: +81-3-5479-2857 Fax: +81-3-5479-0502
RICOH EUROPE (NETHERLANDS) B.V.
Semiconductor Support Centre
Prof. W.H. Keesomlaan 1, 1183 DJ Amstelveen, The Netherlands
Phone: +31-20-5474-309
RICOH ELECTRONIC DEVICES KOREA CO., LTD.
3F, Haesung Bldg, 504, Teheran-ro, Gangnam-gu, Seoul, 135-725, Korea
Phone: +82-2-2135-5700 Fax: +82-2-2051-5713
RICOH ELECTRONIC DEVICES SHANGHAI CO., LTD.
Room 403, No.2 Building, No.690 Bibo Road, Pu Dong New District, Shanghai 201203,
People's Republic of China
Phone: +86-21-5027-3200 Fax: +86-21-5027-3299
RICOH ELECTRONIC DEVICES CO., LTD.
Taipei office
Room 109, 10F-1, No.51, Hengyang Rd., Taipei City, Taiwan (R.O.C.)
Phone: +886-2-2313-1621/1622 Fax: +886-2-2313-1623