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LOW NOISE 150mA L.D.O REGULATOR
R1120N SERIES
APPLICATION MANUAL
ELECTRONIC DEVICES DIVISION
NO. EA-047-9803
NOTICE
1. The products and the product specifications described in this application manual 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. This application manual 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 application manual 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, computer 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 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 application manual. 8. Please contact Ricoh sales representatives should you have any questions or comments concerning the products or the technical information.
June 1995
R1120N SERIES
APPLICATION MANUAL
CONTENTS
OUTLINE ......................................................................................................1 FEATURES ...................................................................................................1 APPLICATIONS .............................................................................................1 BLOCK DIAGRAM .........................................................................................2 SELECTION GUIDE .......................................................................................2 PIN CONFIGURATION ...................................................................................3 PIN DESCRIPTION ........................................................................................3 ABSOLUTE MAXIMUM RATINGS ...................................................................4 ELECTRICAL CHARACTERISTICS ................................................................5 OPERATION..................................................................................................7 TEST CIRCUITS ............................................................................................8 TYPICAL CHARACTERISTICS .......................................................................9 1) Output Voltage vs. Output Current ......................................................................9 2) Output Voltage vs. Input Voltage ........................................................................9 3) Dropout Voltage vs. Output Current ...................................................................10 4) Output Voltage vs. Temperature .......................................................................11 5) Supply Current vs. Input Voltage ......................................................................11 6) Supply Current vs. Temperature .......................................................................12 7) Dropout Voltage vs. Set Output Voltage ..............................................................13 8) Ripple Rejection vs. Frequency ........................................................................13 9) Ripple Rejection vs. Input Voltage (DC bias) .........................................................15 10) Line Transient Response ...............................................................................15 11) Load Transient Response ..............................................................................16 TYPICAL APPLICATION ..............................................................................19 PACKAGE DIMENSION ................................................................................19 TAPING SPECIFICATION .............................................................................20
LOW NOISE 150mA L.D.O REGULATOR
R1120N SERIES
OUTLINE
The R1120N Series are voltage regulator ICs with high output voltage accuracy, lowest supply current, low ON Resistance and high Ripple Rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, resistors, a current limit circuit and a chip enable circuit. These ICs perform with low dropout voltage and a chip enable function. The Dynamic Response to line and load is fast, so these ICs are very suitable for the power supply for handheld communication equipment. The output voltage of these ICs is fixed with high accuracy. Since the package for these ICs are SOT-23-5(Mini-mold)package, high density mounting of the ICs on boards is possible.
FEATURES
* Ultra-Low Supply Current .....................TYP. 35A * Standby Current .....................................TYP. 0.1A * Dropout Voltage .....................................TYP. 0.2V (IOUT=100mA) * High Ripple Rejection ............................TYP. 70dB (f=1kHz) * High Accuracy Output Voltage ............2.0% * Low Temperature-Drift Coefficient of Output Voltage .......................................TYP. 100ppm/C * Excellent Line Regulation .....................TYP. 0.05%/V * Pinout .......................................................Similar to the TK112 * Small Package.........................................SOT-23-5 (Mini-mold)
APPLICATIONS
* Power source for portable communication tools, cameras and VCRs. * Power source for battery-powered equipment. * Power source for domestic appliances.
1
R1120N
BLOCK DIAGRAM
R1120Nxx1A R1120Nxx1B
VDD 3 -+ Vref Current Limit CE 4
1 VOUT
VDD 3 -+ Vref Current Limit
1 VOUT
2 GND
CE 4
2 GND
SELECTION GUIDE
The output voltage, the active type, the packing type and the taping type for the ICs can be selected at the user's request. The selection can be made by designating the part number as shown below: R1120N xx1 x-xx Part Number
}
a
b c
}
Code
Contents
a
Setting Output Voltage ( VOUT) : Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible. Designation of Chip enable Active Type :
b
A : "L" active type B : "H" active type
c
Designation of Taping Type : Ex. TR, TL (refer to Taping Specifications, TR type is prescribed as a standard.)
2
R1120N
PIN CONFIGURATION
* SOT-23-5
5 4
(mark side)
1
2
3
PIN DESCRIPTION
Pin No. Symbol Pin Description
1 2 3 4 5
VOUT GND VDD CE or CE NC
Output Pin Ground Pin Input Pin Chip Enable Pin No Connection
3
R1120N
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VIN VCE VOUT IOUT PD Topt Tstg
Input Voltage Input Voltage for CE/CE Pin Output Voltage Output Current Power Dissipation Operating Temperature Range Storage Temperature Range
9 -0.3 to VIN +0.3 -0.3 to VIN +0.3 200 250 -40 to 85 -55 to 125
V V V mA mW C C
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits.
4
R1120N
ELECTRICAL CHARACTERISTICS
Topt=25C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
VOUT
Output Voltage
VIN-setVOUT=1.0V 1mAIOUT30mA VIN-setVOUT=1.0V when VOUT=setVOUT-0.1V VIN-setVOUT=1.0V 1mAIOUT80mA
x 0.98
150
x 1.02
V
IOUT VOUT IOUT VDIF Iss Istandby VOUT VIN RR VIN VOUT Topt Ilim RPU VCEH VCEL en
Output Current
mA
Load Regulation Dropout Voltage Supply Current Standby Current Line Regulation
12
40
mV
refer to the ELECTICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN-setVOUT=1.0V VIN-setVOUT=1.0V, VCE=VIN 35 0.1 70 1.0 A A
refer to the ELECTICAL CHARACTERISTICS by OUTPUT VOLTAGE f=1kHz, Ripple 0.5Vp-p VIN-setVOUT=1.0V 2.7 IOUT=30mA -40CTopt85C VOUT=0V 2.5 1.5 0 BW=10Hz to 100kHz 60 100 50 5 10 VIN 0.25
Ripple Rejection Input Voltage Output Voltage Temperature Coefficient Short Current Limit Pull up resistance for CE pin CE Input Voltage "H" CE Input Voltage "L" Output Noise
70 8
dB V ppm/C mA M V V Vrms
5
R1120N
Topt=25C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
VOUT
Output Voltage
VIN-setVOUT=1.0V 1mAIOUT30mA VIN-setVOUT=1.0V when VOUT=setVOUT - 0.1V VIN-setVOUT=1.0V 1mAIOUT80mA
x 0.98
150
x 1.02
V
IOUT VOUT IOUT VDIF Iss Istandby VOUT VIN RR VIN VOUT Topt Ilim RPD VCEH VCEL en
Output Current
mA
Load Regulation Dropout Voltage Supply Current Standby Current Line Regulation
12
40
mV
refer to the ELECTICAL CHARACTERISTICS by OUTPUT VOLTAGE VIN-setVOUT=1.0V VIN-setVOUT=1.0V, VCE=GND 35 0.1 70 1.0 A A
refer to the ELECTICAL CHARACTERISTICS by OUTPUT VOLTAGE f=1kHz, Ripple 0.5Vp-p VIN-setVOUT=1.0V 2.7 IOUT=30mA -40CTopt85C VOUT=0V 2.5 1.5 0 BW=10Hz to 100kHz 60 100 50 5 10 VIN 0.25
Ripple Rejection Input Voltage Output Voltage Temperature Coefficient Short Current Limit Pull down resistance for CE pin CE Input Voltage "H" CE Input Voltage "L" Output Noise
70 8
dB V ppm/C mA M V V Vrms
* ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Dropout Voltage Output Voltage VOUT(V) Conditions VDIF(V) TYP. MAX. Line Regection VOUT/VIN(%/V) Conditions TYP.
Topt=25C
MAX.
2.0VOUT2.4 2.5VOUT2.7 2.8VOUT3.3 3.4VOUT6.0 IOUT=100mA
0.30 0.24 0.20 0.17
0.70 0.35 0.30 0.26
IOUT=30mA setVOUT+0.7VVIN8V 0.05 IOUT=30mA setVOUT+0.5VVIN8V 0.20
6
R1120N
OPERATION
R1120Nxx1A R1120Nxx1B
VDD 3 -+ Vref Current Limit CE 4 R2 R1
1 VOUT
VDD 3 -+ Vref Current Limit R2 R1
1 VOUT
2 GND
CE 4
2 GND
In these ICs, fluctuation in Output Voltage VOUT is detected by Feed-back Registers R1, R2, and the result is compare with a reference voltage by Error Amplifier, so that a constant voltage is output. A current limit circuit working for Short Protect and a chip enable circuit are included.
7
R1120N
TEST CIRCUITS
CE 4 IN VDD 3 R1120Nxx1B Series 10F 1 VOUT OUT IOUT 10F IN ISS R1120Nxx1B Series 10F 10F VDD 3 1 4 VOUT OUT CE
2 GND
2 GND
Standard Test Circuit
Test Circuit for Supply Current
CE 4 VDD 3 R1120Nxx1B Series 1 VOUT OUT IOUT 10F 10F P.G 2 GND 2 IN VDD 3 4
CE VOUT 1 R1120Nxx1B Series 10F
OUT
GND
I1
I2
Test Circuit for Ripple Rejection and Line Transient Response
Test Circuit for Load Transient Response
8
R1120N
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
R1120N301B
3.5 Topt=25C 4.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 100 200 300 400 500
R1120N401B
Topt=25C 6.0V 5.0V 4.5V VIN=4.3V
Output Voltage VOUT(V)
5.0V 4.0V 3.5V VIN=3.3V
Output Voltage VOUT(V)
4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 100 200 300 400
500
Output Current IOUT(mA)
Output Current IOUT(mA)
R1120N501B
6.0
Output Voltage VOUT(V)
5.0 4.0 3.0 2.0 1.0 0.0 0 100 200 300
Topt=25C 7.0V 6.0V
5.5V VIN=5.3V
400
500
Output Current IOUT(mA)
2) Output Voltage vs. Input Voltage
R1120N301B
3.1 IOUT=1mA
R1120N401B
Topt=25C 4.5 Topt=25C IOUT=1mA 4.0
Output Voltage VOUT(V)
3.0 2.9 2.8 2.7 2.6 50mA
Output Voltage VOUT(V)
3.5 30mA
3.0
30mA 2.5 2.0 3.0
4.0
5.0
6.0
7.0
8.0
2.5 2.0
50mA 3.0 4.0 5.0 6.0 7.0 8.0
Input Voltage VIN(V)
Input Voltage VIN(V)
9
R1120N
R1120N501B
5.5 Topt=25C
Output Voltage VOUT(V)
5.0 4.5 IOUT=1mA 4.0 3.5 30mA 3.0 2.5 2.0 50mA 3.0 4.0 5.0 6.0 7.0 8.0
Input Voltage VIN(V)
3) Dropout Voltage vs. Output Current
R1120N301B
0.40 Topt=85C 0.40
R1120N401B
Dropout Voltage VDIF(V)
0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 50 100 150 -40C 25C Topt=85C
Dropout Voltage VDIF(V)
0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 50 100 150 25C -40C
Output Current IOUT(mA)
Output Current IOUT(mA)
R1120N501B
0.40
Dropout Voltage VDIF(V)
0.35 0.30 Topt=85C 0.25 0.20 0.15 0.10 0.05 0.00 0 50 100 150 -40C 25C
Output Current IOUT(mA)
10
R1120N
4) Output Voltage vs. Temperature
R1120N301B
3.10 3.08 3.06 3.04 3.02 3.00 2.98 2.96 2.94 2.92 2.90 -50 VIN=4V IOUT=10mA
R1120N401B
4.10 4.08 4.06 4.04 4.02 4.00 3.98 3.96 3.94 3.92 3.90 -50
VIN=5V IOUT=10mA
Output Voltage VOUT(V)
Output Voltage VOUT(V)
-25
0
25
50
75
100
-25
0
25
50
75
100
TemperatureTopt(C)
TemperatureTopt(C)
R1120N501B
5.10 5.08 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 -50
VIN=6V IOUT=10mA
Output Voltage VOUT(V)
-25
0
25
50
75
100
TemperatureTopt(C)
5) Supply Current vs. Input Voltage
R1120N301B
50 Topt=25C 50
R1120N401B
Topt=25C
Supply Current ISS(A)
Supply Current ISS(A)
40 30 20 10 0 2.0
40 30 20 10 0 2.0
3.0
4.0
5.0
6.0
7.0
8.0
3.0
4.0
5.0
6.0
7.0
8.0
Input Voltage VIN(V)
Input Voltage VIN(V)
11
R1120N
R1120N501B
50 Topt=25C
Supply Current ISS(A)
40 30 20 10 0 2.0
3.0
4.0
5.0
6.0
7.0
8.0
Input Voltage VIN(V)
6) Supply Current vs. Temperature
R1120N301B
50 VIN=4V 50
R1120N401B
VIN=5V
Supply Current ISS(A)
45 40 35 30 25 20 -50
Supply Current ISS(A)
-25 0 25 50 75 100
45 40 35 30 25 20 -50
-25
0
25
50
75
100
TemperatureTopt(C)
TemperatureTopt(C)
R1120N501B
50 VIN=6V
Supply Current ISS(A)
45 40 35 30 25 20 -50
-25
0
25
50
75
100
TemperatureTopt(C)
12
R1120N
7) Dropout Voltage vs. Set Output Voltage
R1120Nxx1B
0.7 Topt=25C
Dropout Voltage VDIF(V)
0.6 0.5 0.4 0.3 0.2 0.1 0.0 2.0 3.0 4.0
IOUT=150mA IOUT=100mA IOUT=50mA IOUT=30mA IOUT=10mA
5.0
6.0
Set Output Voltage Vreg(V)
8) Ripple Rejection vs. Frequency
R1120N301B
80 VIN=4VDC+0.5Vp-p COUT=4.7F 80
R1120N301B
VIN=4VDC+0.5Vp-p COUT=6.8F
Ripple Rejection RR(dB)
60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Ripple Rejection RR(dB)
70
70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Frequency f(kHZ)
Frequency f(kHZ)
R1120N301B
80 VIN=4VDC+0.5Vp-p COUT=10F 80
R1120N401B
VIN=5VDC+0.5Vp-p COUT=4.7F
Ripple Rejection RR(dB)
60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Ripple Rejection RR(dB)
70
70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Frequency f(kHZ)
Frequency f(kHZ)
13
R1120N
R1120N401B
80 VIN=5VDC+0.5Vp-p COUT=6.8F 80
R1120N401B
VIN=5VDC+0.5Vp-p COUT=10F
Ripple Rejection RR(dB)
60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Ripple Rejection RR(dB)
70
70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Frequency f(kHZ)
Frequency f(kHZ)
R1120N501B
80 VIN=6VDC+0.5Vp-p COUT=4.7F 80
R1120N501B
VIN=6VDC+0.5Vp-p COUT=6.8F
Ripple Rejection RR(dB)
60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Ripple Rejection RR(dB)
70
70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Frequency f(kHZ)
Frequency f(kHZ)
R1120N501B
80 VIN=6VDC+0.5Vp-p COUT=10F
Ripple Rejection RR(dB)
70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100
Frequency f(kHZ)
14
R1120N
9) Ripple Rejection vs. Input Voltage (DC bias)
R1120N301B IOUT =1mA
80 COUT=10F 80 70 60 50 40 30 20 10 0 3.1 3.2 3.3 f=400Hz f=1kHz f=10kHz 3.4 3.5 70 60 50 40 30 20 10 0 3.1 3.2 3.3 f=400Hz f=1kHz f=10kHz 3.4 3.5
R1120N301B IOUT =10mA
COUT=10F
Ripple Rejection RR(dB)
Input Voltage VIN(V)
Ripple Rejection RR(dB)
Input Voltage VIN(V)
R1120N301B IOUT=50mA
80 COUT=10F 70 60 50 40 30 20 10 0 3.1 3.2 3.3 f=400Hz f=1kHz f=10kHz 3.4 3.5
Ripple Rejection RR(dB)
Input Voltage VIN(V)
10) Line Transient Response
R1120N301B
3.4 IOUT=30mA tr=tf=5s COUT=Tantalum4.7F 6 5 Input Voltage 3.2 3.1 Output Voltage 3.0 2.9 2.8 0 20 40 60 80 100 2 1 0 120 4 3
Output Voltage VOUT(V)
3.3
Time t(S)
Input Voltage VIN(V)
15
R1120N
R1120N301B
3.4
IOUT=30mA tr=tf=5s COUT=Tantalum6.8F 6 5 Input Voltage 4 3 Output Voltage 2 1 0 120
Output Voltage VOUT(V)
3.3 3.2 3.1 3.0 2.9 2.8 0 20 40 60 80 100
Time t(S)
R1120N301B
3.4
IOUT=30mA tr=tf=5s COUT=Tantalum10F 6 5 Input Voltage 4 3 Output Voltage 2 1 0 120
Output Voltage VOUT(V)
3.3 3.2 3.1 3.0 2.9 2.8 0 20 40 60 80 100
Time t(S)
11) Load Transient Response
R1120N301B
3.4 VIN=4V CIN=Tantalum1F COUT=Tantalum4.7F 150 100 Output Current 3.2 3.1 Output Voltage 3.0 2.9 2.8 0 2 4 6 8 10 12 14 16 18 20 -50 -100 -150 50 0
Output Voltage VOUT(V)
3.3
Time t(S)
16
Output Current IOUT(mA)
Input Voltage VIN(V)
Input Voltage VIN(V)
R1120N
R1120N301B
3.4
VIN=4V CIN=Tantalum1F COUT=Tantalum6.8F 150 100 Output Current 50 0 Output Voltage -50 -100 -150
Output Voltage VOUT(V)
3.3 3.2 3.1 3.0 2.9 2.8 0 2 4 6 8 10 12 14 16 18 20
Time t(S)
R1120N301B
3.4
VIN=4V CIN=Tantalum1F COUT=Tantalum10F 150 100 Output Current 50 0 Output Voltage -50 -100 -150
Output Voltage VOUT(V)
3.3 3.2 3.1 3.0 2.9 2.8 0 2 4 6 8 10 12 14 16 18 20
Time t(S)
Output Current IOUT(mA)
Output Current IOUT(mA)
17
R1120N
APPLICATION HINTS
When using these ICs, be sure to take care of following points : * In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance) of which is in the range described as follows : The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below. The conditions when the white noise level is under 40V (Avg.) are marked as the hatched area in the graph. (note : When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation, there are possibilities that the operation will be unstable. Because of this, test these ICs with as same external components as ones to be used on the PCB.)
< measuring conditions > VIN=4V Freqency band : 10Hz to 1MHz
Temperature : 25C
* Make VDD and GND line sufficient. When the impedance of these is high, there is a case to pick up the noise or not to work correctly. * Connect the capacitor with a capacitance of 1F or more between VDD and GND as close as possible. * Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.
Ceramic Capacitor 4.7F
100 100
Ceramic Capacitor 6.8F
ESR()
1
ESR()
0 50 80 150
10
10
1
0.1
0.1 0 50 80 150
Output Current IOUT(mA)
Output Current IOUT(mA)
Ceramic Capacitor 10F
100
* Measuring Circuit for white noise ; R1120N301B
ESR()
10
4 CE VOUT 1 Ceramic Capacitor ESR IOUT S.A. Spectrum Analyzer
R1120N301B
1
3
VIN
GND 2
0.1 0 50 80 150
VIN
Ceramic Capacitor1F
Output Current IOUT(mA)
18
R1120N
TYPICAL APPLICATION
CE CE
IN + Cap.
VDD
R1120Nxx1A
VOUT +
OUT Cap.
IN + Cap.
VDD
R1120Nxx1B
VOUT +
OUT Cap.
GND
GND
PACKAGE DIMENSION (Unit : mm)
* SOT-23-5
2.90.2 1.90.2 (0.95) (0.95)
+0.2 1.1 -0.1 0.2 MIN. 0 to 0.1 0.80.1 4 2.80.3
5
1
2 0.40.1
3 +0.1 0.15 -0.05
+0.2 1.6 -0.1
19
R1120N
TAPING SPECIFICATION (Unit : mm)
* SOT-23-5
o 1.5+0.1 -0 4.00.1 2.00.05 1.750.1 3.50.05 3.2 3.3 4.00.1 2.0MAX.
0.30.1
TR
User Direction of Feed
TL
20
8.00.3
RICOH COMPANY, LTD. ELECTRONIC DEVICES DIVISION
HEADQUARTERS 13-1, Himemuro-cho, Ikeda City, Osaka 563-8501, JAPAN Phone 81-727-53-1111 Fax 81-727-53-6011 YOKOHAMA OFFICE (International Sales) 3-2-3, Shin-Yokohama, Kohoku-ku, Yokohama City, Kanagawa 222-8530, JAPAN Phone 81-45-477-1697 Fax 81-45-477-1694 * 1695 http://www.ricoh.co.jp/LSI/english/
RICOH CORPORATION ELECTRONIC DEVICES DIVISION
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