RP202x SERIES
Low Power/Fast MODE alternative 200mA LDO REGULATOR
NO.EA-279-120410
1
OUTLINE
The RP202x Series consist of CMOS-based voltage regulator ICs with high output voltage accuracy, low dropout
voltage and low supply current. These ICs perform with the chip enable function and realize a standby mode with
ultra low supply current. To prevent the destruction by over current, the current limit circuit is included. The RP202
Series have 3-mode. One is standby mode with CE pin. The other two are the fast response mode (Fast Mode) and
the low power mode, and switch over automatically according to the load current of the LDO. Supply current of IC
itself at light load is automatically reduced. The output voltage is maintained between Fast Mode and ECO Mode.
The RP202x consists of a voltage reference unit, an error amplifier, a resister net for voltage setting, and a current
limit circuit.
Since the packages for these ICs are SOT-23-5, SC-88A, and DFN(PLP)1010-4, high density mounting of the ICs
on boards is possible.
FEATURES
●Input Voltage Range .............................................1.4V to 5.25V
●Output Voltage Range ..........................................0.8V to 4.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
●Supply Current (IOUT=0mA) ................................... Typ. 2.5μA
●Supply Current (IOUT=10mA) ................................. Typ. 50μA
●Supply Current (Standby Mode) ........................... Typ. 0.1μA
●Dropout Voltage .................................................... Typ. 0.20V (IOUT=200mA, VOUT=2.8V)
●Ripple Rejection.................................................... Typ. 70dB (f=1kHz, VOUT=2.8V, IOUT=30mA)
●Line Regulation..................................................... Typ. 0.02%/V (IOUT=10mA)
●Packages .............................................................. DFN(PLP)1010-4, SC-88A, SOT-23-5
●Built-in Foldback Protection Circuit....................... Typ. 60mA (Current at short mode)
●Ceramic capacitors are recommended to be used with this IC .....0.47μF or more
APPLICATIONS
●Power source for portable communication equipment.
●Power source for electrical appliances such as cameras, VCRs and camcorders.
●Power source for battery-powered equipment.
RP202x
2
BLOCK DIAGRAMS
RP202xxxxB RP202xxxxD
V
DD
GND
V
OUT
CE
Vref
Current Limit
V
DD
GND
V
OUT
CE
Vref
Current Limit
SELECTION GUIDE
The output voltage, auto discharge function, and package, for the ICs can be selected at the user’s request.
Product Name Package Quantity per Reel Pb Free Halogen Free
RP202Kxx1∗-TR DFN(PLP)1010-4 10,000pcs Yes Yes
RP202Qxx2∗-TR-FE SC-88A 3,000pcs Yes Yes
RP202Nxx1∗-TR-FE SOT-23-5 3,000pcs Yes Yes
xx : The output voltage can be designated in the range from 0.8V(08) to 4.0V(40) in 0.1V steps.
(For other voltages, please refer to MARK INFORMATIONS.)
∗ : The auto discharge function at off state are options as follows.
(B) without auto discharge function at off state
(D) with auto discharge function at off state
Auto-discharge function quickly lowers the output voltage to 0V, when the chip enable signal is switched from the active mode to
the standby mode, by releasing the electrical charge accumulated in the external capacitor.
RP202x
3
PIN CONFIGURATIONS
DFN(PLP)1010-4 SC-88A SOT-23-5
Top View
2 1
3 4
Bottom View
12
43
∗
54
13
2
(mark side)
1 2 3
4
5
(mark side)
PIN DESCRIPTIONS
DFN(PLP)1010-4
Pin No Symbol Pin Description
1 VOUT Output Pin
2 GND Ground Pin
3 CE Chip Enable Pin ("H" Active)
4 VDD Input Pin
∗ Tab is GND level. (They are connected to the reverse side of this IC.) The tab is better to be connected to the
GND, but leaving it open is also acceptable.
SC-88A
Pin No Symbol Pin Description
1 CE Chip Enable Pin ("H" Active)
2 NC No Connection
3 GND Ground Pin
4 VOUT Output Pin
5 VDD Input Pin
SOT-23-5
Pin No Symbol Pin Description
1 VDD Input Pin
2 GND Ground Pin
3 CE Chip Enable Pin ("H" Active)
4 NC No Connection
5 VOUT Output Pin
RP202x
4
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VIN Input Voltage 6.0 V
VCE Input Voltage (CE Pin) −0.3 to 6.0 V
VOUT Output Voltage −0.3 to VIN + 0.3 V
IOUT Output Current 220 mA
Power Dissipation (DFN(PLP)1010-4) (Standard Test Land Pattern) ∗400
Power Dissipation (SC-88A) (Standard Test Land Pattern)
∗380
PD
Power Dissipation (SOT-23-5) (Standard Test Land Pattern) ∗420
mW
Ta Operating Temperature Range −40 to 85 °C
Tstg Storage Temperature Range −55 to 125 °C
∗) For Power Dissipation, please refer to PACKAGE 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.
RP202x
5
ELECTRICAL CHARACTERISTICS
VIN=Set VOUT+1V, IOUT=1mA, CIN=COUT =0.47μF, unless otherwise noted.
The specification in is checked and guaranteed by design engineering at −40°C≤Ta≤85°C. (Ta＝25°C)
Symbol Item Conditions Min. Typ. Max. Unit
VOUT > 2.0V × 0.99 ×1.01
IOUT=5mA (Fast Mode)
Ta= 2 5 °C VOUT ≤ 2.0V -20mV 20mV
VOUT > 2.0V ×0.965 ×1.025
VOUT Output Voltage
IOUT=5mA (Fast Mode)
-40°C ≤ Ta ≤ 85°C VOUT ≤ 2.0V −70mV 50mV
V
IOUT Output Current 200 mA
VOUT > 2.0V −1.0 1.0 %
1mA ≤ IOUT ≤ 10mA
VOUT ≤ 2.0V −20 20 mV
∆VOUT
/∆IOUT Load Regulation
10mA ≤ IOUT ≤ 200mA −20 10 30 mV
VDIF Dropout Voltage Refer to the "Dropout Voltage"
ISS1 Supply Current
(IOUT=0mA)*1IOUT=0mA 2.5 5.0 μA
ISS2 Supply Current
(IOUT=10mA) IOUT=10mA 50 μA
Istandby Standby Current VCE=GND 0.1 1.0 μA
IOUTH Fast Mode
switch-over current IOUT= Light load to Heavy load 8.0 mA
IOUTL Low Power Mode
switch-over current IOUT= Heavy load to Light load 1.0 2.0 mA
IOUT=1mA
(Low Power Mode) ±0.50
∆VOUT
/∆VIN Line Regulation VOUT+0.5V ≤ VIN ≤ 5V
1.4V ≤ VIN IOUT=10mA
(Fast Mode) ±0.02 ±0.10
%/V
VOUT ≤ 1.8V 75
1.8< VOUT ≤2.8V 70
2.8< VOUT ≤3.3V 65
RR Ripple Rejection
f=1kHz
Ripple 0.2Vp-p
VIN=VOUT+1.0V，
IOUT=30mA 3.3 < VOUT 60
dB
VIN Input Voltage 1.4 5.25 V
∆VOUT
/∆Ta
Output Voltage
Temperature Coefficient
−40°C ≤ Ta ≤ 85°C ±100 ppm
/°C
ISC Short Current Limit VOUT=0V 60 mA
ICEPD CE Pull-down
Constant Current 0.3 0.6 μA
VCEH CE Input Voltage “H” 1.0 V
VCEL CE Input Voltage “L” 0.4 V
RLOW
Low Output Nch Tr.
ON Resistance
(of D version)
VIN = 4.0V
VCE = 0V 60 Ω
All of units are tested and specified under load conditions such that Tj≈Ta=25°C except for Ripple Rejection, Output
Voltage Temperature Coefficient.
∗1) The value of supply current is excluding the Pull-down constant current of CE Pin.
RP202x
6
Dropout Voltage Ta＝25°C
Dropout Voltage
VDIF (V)
Output Voltage
VOUT (V) Condition Typ. Max.
0.8 ≤ VOUT<0.9 0.60 0.79
0.9 ≤ VOUT<1.0 0.55 0.73
1.0 ≤ VOUT<1.1 0.50 0.64
1.1 ≤ VOUT<1.2 0.45 0.61
1.2 ≤ VOUT<1.3 0.40 0.56
1.3 ≤ VOUT<1.4 0.37 0.53
1.4 ≤ VOUT<1.5 0.34 0.48
1.5 ≤ VOUT<1.8 0.31 0.43
1.8 ≤ VOUT<2.1 0.27 0.39
2.1 ≤ VOUT<2.5 0.245 0.36
2.5 ≤ VOUT<2.8 0.215 0.31
2.8 ≤ VOUT<3.0 0.20 0.29
3.0 ≤ VOUT<3.3 0.19 0.28
3.3 ≤ VOUT<3.6 0.18 0.27
3.6 ≤ VOUT
IOUT=200mA
0.175 0.27
RP202x
7
TYPICAL APPLICATION
C1 RP202x
Series
V
DD
V
OUT
CE GND
C2
V
OUT
V
IN
(External Components)
C1, C2 : Ceramic Capacitor 0.47μF MURATA: GRM155B31A474KE14
TECHNICAL NOTES
When using these ICs, consider the following points:
Phase Compensation
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this
purpose, use a capacitor C2 with 0.47μF or more and good ESR (Equivalent Series Resistance).
(Note: If additional ceramic capacitors are connected with parallel to the output pin with an output capacitor for
phase compensation, the operation might be unstable. Because of this, test these ICs with as same external
components as ones to be used on the PCB.)
PCB Layout
The impedances of VDD line and GND line has to be low as possible. The high impedances may result in the
unstable operation or a noise pickup. The output capacitor with 0.47µF or more should be placed between VDD and
GND. The line from VDD to the output capacitor, and the line from the output capacitor to GND must be wired as short
as possible.
The output capacitor is placed between VOUT and GND as phase compensation. The line from VOUT to the output
capacitor, and the line from the capacitor to GND must be wired as short as possible. Please refer to the “Basic Test
Circuit” below.
RP202x
8
TEST CIRCUITS
C1 RP202x
Series
V
DD
V
OUT
CE GND
V
C2 V
OUT
I
OUT
C1=Ceramic 0.47μF
C2=Ceramic 0.47μF
Basic Test Circuit
C1 RP202x
Series
V
DD
V
OUT
CE GND
C2
A I
SS
C1=Ceramic 0.47μF
C2=Ceramic 0.47μF
V
OUT
Test Circuit for Supply Current
RP202x
Series
V
DD
V
OUT
CE GND
C2
Pulse
Generator
I
OUT
C2=Ceramic 0.47μF
P. G.
Test Circuit for Ripple Rejection
C1 RP202x
Series
V
DD
V
OUT
CE GND
C2
I
OUTa
I
OUTb
C1=Ceramic 0.47μF
C2=Ceramic 0.47μF
V
OUT
Test Circuit for Load Transient Response
RP202x
9
TYPICAL CHARACTERISTICS
1）Output Voltage vs. Output Current（C1=0.47μF, C2=0.47μF, Ta=25°C）
RP202x08xx RP202x18xx
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 100 200 300 400 500
Output Current I
OUT
(mA)
Output Voltage V
OUT
(V)
1.4V
1..8V
2.8V
3.8V
5.25V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0 100 200 300 400 500
Output Current I
OUT
(mA)
Output Voltage V
OUT
(V)
2.8V
3.8V
4.8V
5.25V
RP202x28xx RP202x40xx
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 100 200 300 400 500
Output Current I
OUT
(mA)
Output Voltage V
OUT
(V)
3.8V
4.8V
5.25V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0 100 200 300 400 500
Output Current I
OUT
(mA)
Output Voltage V
OUT
(V)
5V
5.25V
2）Output Voltage vs. Input Voltage（C1=0.47μF, C2=0.47μF, Ta=25°C）
RP202x08xx RP202x18xx
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
012345
Input Voltage VIN(V)
Output Voltage V
OUT
(V)
Iout =1mA
Iout =3 0mA
Iout =5 0mA
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
012345
Input Voltage VIN(V)
Output Voltage V
OUT
(V)
Iout=1 mA
Iout=30mA
Iout=50mA
RP202x
10
RP202x28xx RP202x40xx
0.0
0.5
1.0
1.5
2.0
2.5
3.0
012345
Input Voltage VIN(V)
Output Voltage V
OUT
(V)
Iout=1mA
Iout=30mA
Iout=50mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
012345
Input Voltage VIN(V)
Output Voltage V
OUT
(V)
Iout=1mA
Iout=30mA
Iout=50mA
3) Supply Current vs. Input Voltage（C1=0.47μF, C2=0.47μF, Ta=25°C）
RP202x08xx RP202x18xx
RP202x28xx RP202x40xx
0
10
20
30
40
50
60
70
80
90
100
012345
Input Voltage V
IN
(V)
Supply Current Iss (µA)
Iout=0mA
Iout=10mA
0
10
20
30
40
50
60
70
80
90
100
012345
Input Voltage V
IN
(V)
Supply Current Iss (µA)
Iout=0mA
Iout=10mA
0
10
20
30
40
50
60
70
80
90
100
012345
Input Voltage V
IN
(V)
Supply Current Iss (µA)
Iout=0mA
Iout=10mA
0
10
20
30
40
50
60
70
80
90
100
012345
Input Voltage V
IN
(V)
Supply Current Iss (µA)
Iout=0mA
Iout=10mA
RP202x
11
4）Supply Current vs. Output Current（C1=0.47µF, C2=0.47µF, Ta=25℃）
RP202x08xx RP202x18xx
VIN=1.8V VIN=2.8V
0
50
100
150
200
0.1 1 10 100 1000
Output Current I
OUT
(mA)
Supply Current Iss (µA)
0
50
100
150
200
0.1 1 10 100 1000
Output Current I
OUT
(mA)
Supply Current Iss (µA)
0.1mA -> 150mA
Low Pow erMode to FastMode
150mA -> 0.1mA
FastMode to Low Pow ertMode
0.1mA -> 150mA
Low Pow erMode to FastMode
150mA -> 0.1mA
FastMode to Low Pow ertMode
RP202x28xx RP202x40xx
VIN=3.8V VIN=5.0V
0
50
100
150
200
0.1 1 10 100 1000
Output Current I
OUT
(mA)
Supply Current Iss (µA)
0
50
100
150
200
0.1 1 10 100 1000
Output Current I
OUT
(mA)
Supply Current Iss (µA)
0.1mA -> 150mA
Low Pow erMode to FastMode
150mA -> 0.1mA
FastMode to Low Pow ertMode
0.1mA -> 150mA
Low Pow erMode to FastMode
150mA -> 0.1mA
FastMode to Low Pow ertMode
5）Output Voltage vs. Temperature（C1=0.47µF, C2=0.47µF, IOUT=1mA）
RP202x08xx RP202x18xx
VIN=1.8V VIN=2.8V
0.75
0.76
0.77
0.78
0.79
0.80
0.81
0.82
0.83
0.84
0.85
-50 -25 0 25 50 75 100
Temperature (°C)
Output Voltage (V)
1.75
1.76
1.77
1.78
1.79
1.80
1.81
1.82
1.83
1.84
1.85
-50 -25 0 25 50 75 100
Temperature (°C)
Output Voltage (V)
RP202x
12
RP202x28xx RP202x40xx
VIN=3.8V VIN=5.0V
2.75
2.76
2.77
2.78
2.79
2.80
2.81
2.82
2.83
2.84
2.85
-50 -25 0 25 50 75 100
Temperature (°C)
Output Voltage (V)
3.90
3.92
3.94
3.96
3.98
4.00
4.02
4.04
4.06
4.08
4.10
-50 -25 0 25 50 75 100
Temperature (°C)
Output Voltage (V)
6）Supply Current vs. Temperature（C1=0.47µF, C2=0.47µF）
RP202x08xx RP202x18xx
(Auto ECO Low Power Mode) (Auto ECO Low Power Mode)
VIN=1.8V , IOUT=0mA VIN=2.8V , IOUT=0mA
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-50 -25 0 25 50 75 100
Temperature(°C)
Supply Current (µA)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-50-25 0 25 50 7510
Temperature(°C)
Supply Current (µA)
0
RP202x28xx RP202x40xx
(Auto ECO Low Power Mode) (Auto ECO Low Power Mode)
VIN=3.8V , IOUT=0mA VIN=5.0V , IOUT=0mA
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-50 -25 0 25 50 75 100
Temperature(°C)
Supply Current (µA)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-50-25 0 25 50 7510
Temperature(°C)
Supply Current (µA)
0
RP202x
13
RP202x08xx RP202x18xx
(Auto ECO FAST Mode) (Auto ECO FAST Mode)
VIN=1.8V , IOUT=10mA VIN=2.8V , IOUT=10mA
35
40
45
50
55
60
65
-50 -25 0 25 50 75 100
Temperature(°C)
Supply Current (µA)
35
40
45
50
55
60
65
-50-25 0 255075100
Temperature(°C)
Supply Current (µA)
RP202x28xx RP202x40xx
(Auto ECO FAST Mode) (Auto ECO FAST Mode)
VIN=3.8V , IOUT=10mA VIN=5.0V , IOUT=10mA
35
40
45
50
55
60
65
-50-25 0 255075100
Temperature(°C)
Supply Current (µA)
35
40
45
50
55
60
65
-50-25 0 255075100
Temperature(°C)
Supply Current (µA)
7）Dropout Voltage vs. Output Current（C1=0.47µF, C2=0.47µF）
RP202x08xx RP202x10xx
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
RP202x
14
RP202x12xx RP202x15xx
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
RP202x18xx RP202x21xx
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
RP202x28xx RP202x33xx
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
RP202x
15
RP202x40xx
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 50 100 150 200
Output Current I
OUT
(mA)
DropOut Voltage VDIF
(V)
-40°C
25°C
85°C
8）Dropout Voltage vs Set Output Voltage
0
0.1
0.2
0.3
0.4
0.5
0.6
01234
Set Output Voltage V
REG
(V)
DropOut Voltage VDIF
(V)
1mA
30mA
50mA
200mA
9）Maximum Output Current vs. Set Output Voltage（C1=0.47µF, C2=0.47µF, VIN=1.4V）
60
80
100
120
140
160
180
200
220
240
0.8 0.9 1 1.1 1.2 1.3
Set Output Voltage V
OUT
(V)
Output Current I
OUT
(mA)
25°C
85°C
RP202x
16
10）Ripple Rejection vs. Input Bias Voltage（C1=none, C2=0.47µF, Ripple=0.2Vp-p, Ta=25°C）
RP202x08xx RP202x18xx
(Auto ECO Low Power Mode) (Auto ECO Low Power Mode)
IOUT=1mA IOUT=1mA
0
10
20
30
40
50
60
70
0.81.82.83.84.8
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
0.1kHz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
1.8 2.8 3.8 4.8
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
0.1kHz
1kHz
10kHz
100kHz
RP202x28xx RP202x40xx
(Auto ECO Low Power Mode) (Auto ECO Low Power Mode)
IOUT=1mA IOUT=1mA
0
10
20
30
40
50
60
70
2.8 3.3 3.8 4.3 4.8 5.3
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
0.1kHz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
4.0 4.5 5.0
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
0.1kHz
1kHz
10kHz
100kHz
RP202x08xx RP202x18xx
(Auto ECO FAST Mode) (Auto ECO FAST Mode)
IOUT=30mA IOUT=30mA
0
10
20
30
40
50
60
70
80
90
100
0.8 1.8 2.8 3.8 4.8
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
0.1kHz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
80
90
100
1.8 2.8 3.8 4.8
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
0.1kHz
1kHz
10kHz
100kHz
RP202x
17
RP202x28xx RP202x40xx
(Auto ECO FAST Mode) (Auto ECO FAST Mode)
IOUT=30mA IOUT=30mA
0
10
20
30
40
50
60
70
80
90
100
2.8 3.3 3.8 4.3 4.8 5.3
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
0.1kHz
1kHz
10kHz
100kHz
0
10
20
30
40
50
60
70
80
90
100
4.0 4.2 4.4 4.6 4.8 5.0 5.2
Input Voltage V
IN
(V)
Ripple Rejection RR(dB)
0.1kHz
1kHz
10kHz
100kHz
11）Ripple Rejection vs. Frequency（C1=none, C2=0.47µF, Ripple=0.2Vp-p, Ta=25°C）
RP202x08xx RP202x18xx
VIN=1.8V+0.2Vp-p VIN=2.8V+0.2Vp-p
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
Frequency [kHz]
Ripple Rejection (dB)
1mA
30mA
50mA
100mA
200mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
Frequency [kHz]
Ripple Rejection (dB)
1mA
30mA
50mA
100mA
200mA
RP202x28xx RP202x40xx
VIN=3.8V+0.2Vp-p VIN=5.0V+0.2Vp-p
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
Frequency [kHz]
Ripple Rejection (dB)
1mA
30mA
50mA
100mA
200mA
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
Frequency [kHz]
Ripple Rejection (dB)
1mA
30mA
50mA
100mA
200mA
RP202x
18
12）Input Transient Response（C1=none, C2=0.47µF, tr=tf=5μs, Ta=25°C）
RP202x08xx RP202x18xx
(Auto ECO Low Power Mode) (Auto ECO Low Power Mode)
VIN=1.8V⇔2.8V, IOUT=1mA VIN=2.8V⇔3.8V, IOUT=1mA
0.74
0.76
0.78
0.80
0.82
0.84
0.86
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
Time t (ms)
Output Voltage V
OUT
(V)
0
1
2
3
4
Input Voltage V
IN
(V)
1.75
1.77
1.79
1.81
1.83
1.85
1.87
-0.500.511.522.533.54
Time t(ms)
Output Voltage V
OUT
(V)
0
1
2
3
4
5
Input Voltage V
IN
(V)
Input Voltage
Output Voltage
Input Voltage
Output Voltage
RP202x28xx RP202x40xx
(Auto ECO Low Power Mode) (Auto ECO Low Power Mode)
VIN=3.8V⇔4.8V, IOUT=1mA VIN=5.0V⇔5.25V, IOUT=1mA
2.77
2.79
2.81
2.83
2.85
2.87
2.89
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
Time t(ms )
Output Voltage V
OUT
(V)
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
3.96
3.98
4.00
4.02
4.04
4.06
4.08
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
Time t(ms)
Output Voltage V
OUT
(V)
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
Input Voltage
Input Voltage
Output Voltage
Output Voltage
RP202x08xx RP202x18xx
(Auto ECO FAST Mode) (Auto ECO FAST Mode)
VIN=1.8V⇔2.8V, IOUT=30mA VIN=2.8V⇔3.8V, IOUT=30mA
0.799
0.800
0.801
0.802
0.803
0.804
0.805
0.806
0.807
0.808
0.809
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
Time t (ms)
Output Voltage V
OUT
(V)
0
1
2
3
4
Input Voltage V
IN
(V)
1.800
1.801
1.802
1.803
1.804
1.805
1.806
1.807
1.808
1.809
1.810
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
Time t(ms)
Output Voltage V
OUT
(V)
0
1
2
3
4
5
Input Voltage V
IN
(V)
Input VoltageInput Voltage
Output Voltage Output Voltage
RP202x
19
RP202x28xx RP202x40xx
(Auto ECO FAST Mode) (Auto ECO FAST Mode)
VIN=3.8V⇔4.8V, IOUT=30mA VIN=5.0V⇔5.25V, IOUT=30mA
2.809
2.810
2.811
2.812
2.813
2.814
2.815
2.816
2.817
2.818
2.819
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
Time t(ms)
Output Voltage V
OUT
(V)
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
4.005
4.007
4.009
4.011
4.013
4.015
4.017
4.019
4.021
4.023
4.025
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
Time t(ms)
Output Voltage V
OUT
(V)
0
1
2
3
4
5
6
Input Voltage V
IN
(V)
Input Voltage
Input Voltage
Output Voltage
Output Voltage
13）Load Transient Response（C1=0.47µF, C2=0.47µF, tr=tf=0.5µs, Ta=25°C）
RP202x08xx RP202x18xx
(Auto ECOLow Power Mode⇔FAST Mode) (Auto ECOLow Power Mode⇔FAST Mode)
VIN=1.8V VIN=2.8V
0.70
0.72
0.74
0.76
0.78
0.80
0.82
0.84
0.86
0.88
-20246810
Time (ms )
Output Voltage V
OUT
(V)
-140
-120
-100
-80
-60
-40
-20
0
20
40
Output Current I
OUT
(mA)
Output Current
0⇔30mA
Output Voltage
1.7
1.72
1.74
1.76
1.78
1.8
1.82
1.84
1.86
1.88
-202468
Time (ms )
Output Voltage V
OUT
(V)
-140
-120
-100
-80
-60
-40
-20
0
20
40
Output Current I
OUT
(mA)
Output Current
0⇔30mA
Output Voltage
RP202x28xx RP202x40xx
(Auto ECO Low Power Mode⇔FAST Mode) (Auto ECO Low Power Mode⇔FAST Mode)
VIN=3.8V VIN=5.0V
2.70
2.73
2.76
2.79
2.82
2.85
2.88
2.91
2.94
2.97
-1 0 1 2 3 4
Time (ms )
Output Voltage V
OUT
(V)
-140
-120
-100
-80
-60
-40
-20
0
20
40
Output Current I
OUT
(mA)
Output Current
0⇔30mA
Output Voltage
3.90
3.93
3.96
3.99
4.02
4.05
4.08
4.11
4.14
4.17
-0.5 0 0.5 1 1.5 2
Time (ms )
Output Voltage V
OUT
(V)
-140
-120
-100
-80
-60
-40
-20
0
20
40
Output Current I
OUT
(mA)
Output Current
0⇔30mA
Output Voltage
RP202x
20
RP202x08xx RP202x18xx
(Auto ECO FAST Mode) (Auto ECO FAST Mode)
VIN=1.8V VIN=2.8V
0.76
0.78
0.80
0.82
0.84
0.86
0.88
0.90
-2020 60100140180
Time (μs)
Output Voltage VOUT (V)
-200
-150
-100
-50
0
50
100
150
Output Current IOUT (mA)
Output Voltage
Output Current
50⇔100mA
1.76
1.78
1.80
1.82
1.84
1.86
1.88
1.90
-20 20 60 100 140 180
Time (μs)
Output Voltage VOUT (V)
-200
-150
-100
-50
0
50
100
150
Output CUrrent IOUT (mA)
Output Voltage
Output Current
50⇔100mA
RP202x28xx RP202x40xx
(Auto ECO FAST Mode) (Auto ECO FAST Mode)
VIN=3.8V VIN=5.0V
2.76
2.78
2.80
2.82
2.84
2.86
2.88
2.90
-2020 60100140180
Time (μs)
Output Voltage V
OUT
(V)
-200
-150
-100
-50
0
50
100
150
Output CUrrent I
OUT
(mA)
Output Voltage
Output Current
50⇔100mA
3.96
3.98
4.00
4.02
4.04
4.06
4.08
4.10
-20 20 60 100 140 180
Time (μs)
Output Voltage VOUT (V)
-200
-150
-100
-50
0
50
100
150
Output Current IOUT(mA)
Output Voltage
Output Current
50⇔100mA
RP202x08xx RP202x18xx
(Auto ECOLow Power Mode⇒FAST Mode) (Auto ECO Low Power Mode⇒FAST Mode)
VIN=1.8V VIN=2.8V
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1.00
-0.02 0 0.02 0.04 0.06 0.08
Time (ms )
Output Voltage V
OUT
(V)
-600
-500
-400
-300
-200
-100
0
100
200
Output Current I
OUT
(mA)
Output Current
0.1⇔100mA
Output Voltage
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
-0.02 0 0.02 0.04 0.06 0.08
Time (ms )
Output Voltage V
OUT
(V)
-600
-500
-400
-300
-200
-100
0
100
200
Output Current I
OUT
(mA)
Output Current
0.1⇔100mA
Output Voltage
RP202x
21
RP202x28xx RP202x40xx
(Auto ECO Low Power Mode⇒FAST Mode) (Auto ECO Low Power Mode⇒FAST Mode)
VIN=3.8V VIN=5.0V
2.60
2.65
2.70
2.75
2.80
2.85
2.90
2.95
3.00
-0.02 0 0.02 0.04 0.06 0.08
Time (ms )
Output Voltage V
OUT
(V)
-600
-500
-400
-300
-200
-100
0
100
200
Output Current I
OUT
(mA)
Output Current
0.1⇔100mA
Output Voltage
3.80
3.85
3.90
3.95
4.00
4.05
4.10
4.15
4.20
-0.02 0 0.02 0.04 0.06 0.08
Time (ms )
Output Voltage V
OUT
(V)
-600
-500
-400
-300
-200
-100
0
100
200
Output Current I
OUT
(mA)
Output Current
0.1⇔100mA
Output Voltage
14）Turn On Waveform (Output Voltage) with CE pin（C1=0.47µF, Ta=25°C）
RP202x08xx RP202x18xx
VIN=1.8V, IOUT=0mA VIN=2.8V, IOUT=0mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-50 0 50 100 150 200 250
Time t(μs)
Input Voltage (V)
0.0
0.5
1.0
1.5
2.0
Output Voltage (V)
0.0
0.5
1.0
1.5
2.0
2.5
-50 0 50 100 150 200
Time t(μs)
Input Voltage (V)
0.0
0.2
0.4
0.6
0.8
1.0
Output Voltage (V)
CE Input Voltage
Output Voltage
― C2=1μF
― C2=2.2μF
― C2=4.7μF
― C2=10μF
CE Input Voltage
― C2=1μF
― C2=2.2μF
― C2=4.7μF
― C2=10μF
― C2=14.7μF― C2=14.7μF
Output Voltage
RP202x28xx RP202x40xx
VIN=3.8V, IOUT=0mA VIN=5.0V, IOUT=0mA
0.0
1.0
2.0
3.0
4.0
5.0
6.0
-50 50 150 250 350 450
Time t(μs)
Input Voltage (V)
0.0
1.0
2.0
3.0
4.0
Output Voltage (V)
0.0
1.0
2.0
3.0
4.0
5.0
-50 50 150 250 350
Time t(μs)
Input Voltage (V)
0.0
0.7
1.4
2.1
2.8
3.5
Output Voltage (V)
CE Input Voltage
Output Voltage
― C2=1μF
― C2=2.2μF
― C2=4.7μF
― C2=10μF
CE Input Voltage
― C2=1μF
― C2=2.2μF
― C2=4.7μF
― C2=10μF
― C2=14.7μF― C2=14.7μF
Output Voltage
RP202x
22
15）Turn On Input Waveform (Input Current) with CE pin（C1=0.47µF, Ta=25°C）
RP202x08xx RP202x18xx
VIN=1.8V, IOUT=0mA VIN=2.8V, IOUT=0mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-50 0 50 100 150 200 250
Time t(μs)
Input Voltage (V)
0
100
200
300
400
500
Rush Current (mA)
0.0
0.5
1.0
1.5
2.0
2.5
-50 0 50 100 150 200
Time t(μs)
Input Voltage (V)
0
100
200
300
400
500
Rush Current (mA)
CE Input Voltage
Rush Current
― C2=1μF
― C2=2.2μF
― C2=4.7μF
― C2=10μF
CE Input Voltage
RP202x28xx RP202x40xx
VIN=3.8V, IOUT=0mA VIN=5.0V, IOUT=0mA
16）Turn On Speed with CE pin (D Version)（C1=0.47µF, C2=0.47µF, Ta=25°C）
RP202x08xx RP202x18xx
VIN=1.8V VIN=2.8V
0.0
0.5
1.0
1.5
-50 50 150 250 350 450
Time t(μs)
Output Voltage (V)
0
2
4
CE Input Voltage (V)
CE Input Voltage
Output Voltage
-----
I
OUT
=30mA
-----
I
OUT
=150mA
0.0
1.0
2.0
3.0
-50 50 150 250 350 450
Time t(μs)
Output Voltage (V)
0
2
4
CE Input Voltage (V)
CE Input Voltage
Output Voltage
-----
I
OUT
=30mA
-----
I
OUT
=150mA
― C2=14.7μF
― C2=1μF
― C2=2.2μF
― C2=4.7μF
― C2=10μF
― C2=14.7μF
Rush Current
0.0
1.0
2.0
3.0
4.0
5.0
6.0
-5050150250350450
Time t(μs)
Input Voltage (V)
0
100
200
300
400
500
Rush Current (mA)
0.0
1.0
2.0
3.0
4.0
5.0
-50 50 150 250 350
Time t(μs)
Input Voltage (V)
0
100
200
300
400
500
Rush Current (mA)
Rush Current
CE Input Voltage
― C2=1μF
― C2=2.2μF
― C2=4.7μF
― C2=10μF
CE Input Voltage
― C2=1μF
― C2=2.2μF
― C2=4.7μF
― C2=10μF
― C2=14.7μF
― C2=14.7μF
Rush Current
RP202x
23
RP202x28xx RP202x40xx
VIN=3.8V VIN=5.0V
0.0
1.0
2.0
3.0
4.0
-50 50 150 250 350 450
Time t(μs)
IOutput Voltage (V)
-8
-6
-4
-2
0
2
4
CE Input Voltage (V)
CE Input Voltage
Output Voltage
-----
I
OUT
=30mA
-----
I
OUT
=150mA
0.0
1.0
2.0
3.0
4.0
5.0
-50 50 150 250 350 450
Time t(μs)
Output Voltage (V)
0
2
4
6
CE Input Voltage (V)
CE Input Voltage
Output Voltage
-----
I
OUT
=30mA
-----
I
OUT
=150mA
17）Turn Off Speed with CE pin (D Version)（C1=0.47µF, C2=0.47µF, Ta=25°C）
RP202x08xx RP202x18xx
VIN=1.8V VIN=2.8V
-0.5
0.0
0.5
1.0
-50 0 50 100 150 200 250 300
Time t(μs)
Output Voltage (V)
0
1
2
3
CE Input Voltage (V)
CE Input Voltage
Output Voltage
-----
I
OUT
=0mA
-----
I
OUT
=30mA
-----
I
OUT
=150mA
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-50 0 50 100 150 200 250 300
Time t(μs)
Output Voltage (V)
0
1
2
3
4
CE Input Voltage (V)
CE Input Voltage
Output Voltage
-----
IOUT=0mA
-----
IOUT=30mA
-----
IOUT=150mA
RP202x28xx RP202x40xx
VIN=3.8V VIN=5.0V
-1
0
1
2
3
4
-50 0 50 100 150 200 250 300
Time t(μs)
Output Voltage (V)
0
2
4
6
CE Input Voltage (V)
CE Input Voltage
Output Voltage
-----
I
OUT
=0mA
-----
I
OUT
=30mA
-----
I
OUT
=150mA
-1
0
1
2
3
4
5
-50 0 50 100 150 200 250 300
Time t(μs)
Output Voltage (V)
0
2
4
6
CE Input Voltage (V)
CE Input Voltage
Output Voltage
-----
IOUT=0mA
-----
IOUT=30mA
-----
IOUT=150mA
RP202x
24
ESR vs. Output Current
When using these ICs, consider the following points:
The relations between IOUT (Output Current) and ESR of an output capacitor are shown below.
The conditions when the white noise level is under 40μV (Avg.) are marked as the hatched area in the graph.
Measurement conditions
Frequency Band : 10Hz to 2MHz
Temperature :
−40°C to 85°C
C1, C2 : 0.47µF
RP202x08xx RP202x18xx
0.01
0.1
1
10
100
1000
0 50 100 150 200
Output Current (mA)
ESR (Ω)
Ta=85°C
Ta=-40°C
0.01
0.1
1
10
100
1000
0 50 100 150 200
Output Current (mA)
ESR (Ω)
Ta=85°C
Ta=-40°C
RP202x28xx RP202x40xx
0.01
0.1
1
10
100
1000
0 50 100 150 200
Output Current (mA)
ESR (Ω)
Ta=85°C
Ta=-40°C
0.01
0.1
1
10
100
1000
0 50 100 150 200
Output Current (mA)
ESR (Ω)
Ta=85°C
Ta=-40°C
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ElectronicDevicesCompany
●Taipeioffice
Room109,10F-1,No.51,HengyangRd.,TaipeiCity,Taiwan(R.O.C.)
Phone:+886-2-2313-1621/1622Fax:+886-2-2313-1623
http://www.ricoh.com/LSI/
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,firecontainment
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.
RICOHCOMPANY,LTD.ElectronicDevicesCompany
■
Ricoh presented with the Japan Management Quality Award for 1999
.
Ricoh continually strives to promote customer satisfaction, and shares the achievements
of its management quality improvement program with people and society.
■Ricoh awarded ISO 14001 certification.
The Ricoh Group was awarded ISO 14001 certification, which is an international standard for
environmental management systems, at both its domestic and overseas production facilities.
Our current aim is to obtain ISO 14001 certification for all of our business offices.
Ricoh completed the organization of the Lead-free production for all of our products.
After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that
will be shipped from now on comply with RoHS Directive.