LOW DROP-OUT AND LOW NOISE VOLTAGE REGULATOR RN5RZ SERIES APPLICATION MANUAL ELECTRONIC DEVICES DIVISION NO.EA-039-9803 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. 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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 RN5RZ SERIES APPLICATION MANUAL CONTENTS ......................................................................................................1 FEATURES....................................................................................................1 APPLICATIONS .............................................................................................1 BLOCK DIAGRAMS .......................................................................................2 SELECTION GUIDE .......................................................................................2 PIN CONFIGURATION ...................................................................................3 PIN DESCRIPTIONS ......................................................................................3 ABSOLUTE MAXIMUM RATINGS ...................................................................3 ELECTRICAL CHARACTERISTICS ................................................................4 OPERATION ..................................................................................................6 TEST CIRCUITS ............................................................................................6 TYPICAL CHARACTERISTICS .......................................................................8 1) Output Voltage vs. Output Current .....................................................................8 2) Output Voltage vs. Input Voltage .......................................................................8 3) Dropout Voltage vs. Output Current ...................................................................9 4) Output Voltage vs. Temperature ......................................................................10 5) Supply Current vs. Input Voltage .....................................................................10 6) Supply Current vs. Temperature ......................................................................11 7) Dropout Voltage vs. Set Output Voltage .............................................................12 8) Ripple Rejection vs. Frequency ......................................................................12 9) Ripple Rejection vs. Input Voltage (DC bias) .......................................................14 10) Line Transient Response ..............................................................................14 11) Load Transient Response .............................................................................15 FOR STABLE OPERATION ...........................................................................17 POWER DISSIPATION ..................................................................................19 PACKAGE DIMENSION ................................................................................20 TAPING SPECIFICATION..............................................................................20 OUTLINE LOW DROP-OUT AND LOW NOISE VOLTAGE REGULATOR RN5RZ SERIES OUTLINE The RN5RZ Series are voltage regulator ICs with high output voltage accuracy, low supply current, low dropout voltage and high ripple rejection developed through the use of a CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, output voltage setting resistors, a current limit circuit and a chip enable circuit. (Provided two types of chip enable circuit ; “H” active and “L” active, that can be selected when order.) The output voltage of these ICs is fixed with high accuracy. In addition to low supply current from CMOS process, the RN5RZ Series may lengthen battery life through low dropout voltage and chip enable function thanks to the built-in low ON resistance transistor. Also when compared with conventional regulators that employ CMOS process, these ICs have superior ripple rejection, input transient response characteristic and load transient response characteristic thus making these product suitable for power supply for hand-held communication equipment. Since the package for these ICs is the SOT-23-5 package, high density mounting of the ICs on boards is possible. FEATURES • Ultra-Low Supply Current ...........................................TYP. 20µA • Ultra-Low Supply Current (Standby).........................TYP. 0.1µA • High Accuracy Output Voltage ..................................±2.0% • High Ripple Rejection .................................................TYP.55dB (f=1kHz) • Low Dropout Voltage ..................................................TYP. 0.2V (IOUT=60mA) • Low Temperature-Drift Coefficient of Output Voltage........TYP. ±100ppm/˚C • Excellent Line Regulation ...........................................TYP. 0.05%/V • Output Voltage .............................................................Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible (refer to Selection Guide). • Built-in Short Current Limit Circuit ...........................TYP. 50mA • Small Package ..............................................................SOT-23-5 (Mini-mold) APPLICATIONS • Power source for battery-powered equipment. • Power source for cellular phones, cameras, VCRs, camcorders, hand-held audio instruments and hand-held communication equipment. • Power source for domestic appliances. 1 RN5RZ BLOCK DIAGRAMS RN5RZ××B RN5RZ××A 3 VOUT VDD 2 3 VOUT VDD 2 – – + + Vref Vref Current Limit CE 5 Current Limit 1 GND CE 5 1 GND SELECTION GUIDE The output voltage, the active type of the chip enable circuit, the packing type, and the taping type for the ICs can be selected at the user's request. These selections can be made by designating the part number as shown below: } } RN5RZ ××××– ××←Part Number ↑ ↑↑ ↑ a bc d Code a Contents 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 Active Type of The Chip Enable Circuit : b A : “L” active type B : “H” active type Designation of Packing Type : c A : Taping C : Antistatic bag (for Samples only) d Designation of Taping Type : Ex. TR, TL (refer to Taping Specifications ; TR type is the standard direction.) For example, the product with Output Voltage of 5.0V, Specified Polarity of Chip Enable is “H” active and Taping Type TR is designated by Part Number RN5RZ50BA-TR. 2 RN5RZ PIN CONFIGURATION • SOT-23-5 5 4 (mark side) 1 2 3 PIN DESCRIPTION Pin No. Symbol Description 1 GND Ground Pin 2 VDD Input Pin 3 VOUT Output Pin 4 NC No Connection 5 CE or CE Chip Enable Pin ABSOLUTE MAXIMUM RATINGS Symbol Item Ratings Unit 9 V VIN Input Voltage VCE Input Voltage (CE or CE Pin) –0.3 to VIN +0.3 V VOUT Output Voltage –0.3 to VIN +0.3 V IOUT Output Current 200 mA Power Dissipation 250 mW PD Topt Operating Temperature –40 to +85 ˚C Tstg Storage Temperature –55 to +125 ˚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. 3 RN5RZ ELECTRICAL CHARACTERISTICS • RN5RZ××A Series Symbol Item VOUT Output Voltage IOUT Output Current ∆VOUT ∆IOUT Load Regulation VDIF Dropout Voltage ISS Supply Current Istandby Supply Current (Standby) ∆VOUT ∆VIN Line Regulation RR Ripple Rejection VIN Input Voltage ∆VOUT ∆Topt 4 Topt=25˚C Output Voltage Temperature Coefficient Conditions MIN. VIN=VOUT+1V, IOUT=30mA ×0.98 VIN=VOUT+1V When VOUT=VOUT–0.1V TYP. MAX. Unit ×1.02 V 100 VIN=VOUT+1V mA 20 40 mV IOUT=60mA 0.2 0.3 V VIN=VOUT+1V 20 40 µA VIN=VCE=VOUT+1V 0.1 1.0 µA 0.05 0.20 %/V 1mA≤IOUT≤80mA IOUT=30mA VOUT+0.5V≤VIN≤8V f=1kHz, Ripple 0.5Vrms 55 VIN=VOUT+1V dB 8 IOUT=30mA –40˚C≤Topt≤85˚C Ilim Short Current Limit VOUT=0V RPU CE Pull-up Resistance 2.5 VCEH CE Input Voltage “H” 1.5 VCEL CE Input Voltage “L” 0 V ±100 ppm/˚C 50 mA 5 10 MΩ V 0.25 V RN5RZ • RN5RZ××B Series Symbol Topt=25˚C Item VOUT Output Voltage IOUT Output Current ∆VOUT ∆IOUT Load Regulation VDIF Dropout Voltage ISS Supply Current Istandby Supply Current (Standby) ∆VOUT ∆VIN Line Regulation RR Ripple Rejection VIN Input Voltage ∆VOUT ∆Topt Output Voltage Temperature Coefficient Conditions MIN. VIN=VOUT+1V, IOUT=30mA ×0.98 VIN=VOUT+1V When VOUT=VOUT–0.1V TYP. MAX. Unit ×1.02 V 100 VIN=VOUT+1V mA 20 40 mV IOUT=60mA 0.2 0.3 V VIN=VOUT+1V 20 40 µA VIN=VOUT+1V, VCE=GND 0.1 1.0 µA 0.05 0.20 %/V 1mA≤IOUT≤80mA IOUT=30mA VOUT+0.5V≤VIN≤8V f=1kHz, Ripple 0.5Vrms 55 VIN=VOUT+1V dB 8 IOUT=30mA –40˚C≤Topt≤85˚C Ilim Short Current Limit VOUT=0V RPU CE Pull-down Resistance 2.5 VCEH CE Input Voltage “H” 1.5 VCEL CE Input Voltage “L” 0 V ±100 ppm/˚C 50 mA 5 10 MΩ V 0.25 V 5 RN5RZ OPERATION RN5RZ××B RN5RZ××A 3 VOUT VDD 2 3 VOUT VDD 2 – Error Amp. – + R1 Current Limit R2 Error Amp. Vref + R1 Current Limit R2 Vref CE 5 1 GND CE 5 1 GND In these ICs, Output Voltage VOUT is detected by Feed-back Registers R1, R2, and the detected Output Voltage is compared with a reference voltage by an Error Amplifier, so that a constant voltage is output. A current limit circuit working for Short Protect and a chip enable circuit for standby function are included. TEST CIRCUITS 2 VDD VOUT 3 IOUT A RN5RZ SERIES VIN C1 5 CE C2 GND 1 VOUT 3 IOUT RN5RZ SERIES P.G. VIN 5 CE GND C1 1 C1 : 10µF Fig.3 Line Transient Response Test Circuit 6 VOUT 3 RN5RZ SERIES C1 5 CE C2 GND C1 : 1µF C2 : 10µF Fig.2 Supply Current Test Circuit Fig.1 Standard Test Circuit VDD VIN VDD 1 C1 : 1µF C2 : 10µF 2 2 RN5RZ 2 VDD VOUT 3 RN5RZ SERIES VIN C1 5 CE C2 GND l1 1 l2 C1 : 1µF C2 : 10µF Fig.4 Load Transient Response Test Circuit 2 VDD VOUT 3 IOUT RN5RZ SERIES VIN C1 5 CE C2 GND 1 C1 : 1µF C2 : 10µF Fig.5 Ripple Rejection Test Circuit 7 RN5RZ TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current RN5RZ30B RN5RZ40B 5.0 3.5 4.0V 5.0V VIN=3.3V 2.5 4.5 Output Voltage VOUT(V) Output Voltage VOUT(V) 3.5V 3.0 2.0 1.5 1.0 0.5 4.5V 5.0V 4.0 6.0V VIN=4.3V 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 0 100 200 300 400 500 0 Output Current IOUT(mA) 100 200 300 400 500 Output Current IOUT(mA) RN5RZ50B 6.0 Output Voltage VOUT(V) 6.0V 5.0 7.0V VIN=5.3V 4.0 5.5V 3.0 2.0 1.0 0.0 0 100 200 300 400 500 Output Current IOUT(mA) 2) Output Voltage vs. Input Voltage RN5RZ30B RN5RZ40B 5.0 3.5 3.0 2.5 2.0 1.5 IOUT=0mA 1.0 IOUT=30mA 0.5 IOUT=50mA 0.0 0.0 2.0 4.0 6.0 Input Voltage VIN(V) 8 Output Voltage VOUT(V) Output Voltage VOUT(V) 4.0 4.0 3.0 2.0 IOUT=0mA IOUT=30mA 1.0 IOUT=50mA 8.0 0.0 0.0 2.0 4.0 6.0 Input Voltage VIN(V) 8.0 RN5RZ RN5RZ50B Output Voltage VOUT(V) 6.0 5.0 4.0 3.0 IOUT=0mA 2.0 IOUT=30mA 1.0 IOUT=50mA 0.0 0.0 2.0 4.0 6.0 8.0 Input Voltage VIN(V) 3) Dropout Voltage vs. Output Current RN5RZ40B 0.30 0.25 0.25 0.20 0.15 0.10 Topt=–40˚C 0.05 Topt=25˚C Dropout Voltage VDIF(V) Dropout Voltage VDIF(V) RN5RZ30B 0.30 0.20 0.15 0.10 Topt=–40˚C 0.05 Topt=25˚C Topt=85˚C Topt=85˚C 0.00 0.00 0 20 40 60 80 100 Output Current IOUT(mA) 0 20 40 60 80 100 Output Current IOUT(mA) RN5RZ50B Dropout Voltage VDIF(V) 0.35 0.30 0.25 0.20 0.15 Topt=–40˚C 0.10 Topt=25˚C 0.05 Topt=85˚C 0.00 0 20 40 60 80 100 Output Current IOUT(mA) 9 RN5RZ 4) Output Voltage vs. Temperature RN5RZ30B RN5RZ40B 4.10 Output Voltage VOUT(V) Output Voltage VOUT(V) 3.10 3.05 3.00 2.95 2.90 –50 0 50 100 4.05 4.00 3.95 3.90 –50 Temperature Topt(˚C) 0 50 100 Temperature Topt(˚C) RN5RZ50B Output Voltage VOUT(V) 5.10 5.05 5.00 4.95 4.90 –50 0 50 100 Temperature Topt(˚C) 5) Supply Current vs. Input Voltage RN5RZ40B 30 25 25 Supply Current ISS(µA) Supply Current ISS(µA) RN5RZ30B 30 20 15 10 5 0 0.0 2.0 4.0 6.0 Input Voltage VIN(V) 10 8.0 20 15 10 5 0 0.0 2.0 4.0 6.0 Input Voltage VIN(V) 8.0 RN5RZ RN5RZ50B Supply Current ISS(µA) 30 25 20 15 10 5 0 0.0 2.0 4.0 6.0 8.0 Input Voltage VIN(V) 6) Supply Current vs. Temperature RN5RZ40B 30 25 25 Supply Current ISS(µA) Supply Current ISS(µA) RN5RZ30B 30 20 15 10 5 0 –50 0 50 100 Temperature Topt(˚C) 20 15 10 5 0 –50 0 50 100 Temperature Topt(˚C) RN5RZ50B Supply Current ISS(µA) 30 25 20 15 10 5 0 –50 0 50 100 Temperature Topt(˚C) 11 RN5RZ 7) Dropout Voltage vs. Set Output Voltage RN5RZ××B Topt=25˚C Dropout Voltage VDIF(V) 0.35 IOUT=10mA 0.30 IOUT=30mA 0.25 IOUT=50mA 0.20 IOUT=100mA 0.15 0.10 0.05 0.00 2 3 4 5 6 Set Output Voltage Vreg(V) 8) Ripple Rejection vs. Frequency RN5RZ30B RN5RZ30B COUT=tantal 2.2µF 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 Frequency f(kHZ) 12 30 20 10 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 RN5RZ40B COUT=tantal 10µF 40 0 0.1 40 RN5RZ30B 50 10 50 Frequency f(kHZ) 60 20 60 0 0.1 100 70 30 70 Frequency f(kHZ) 80 Ripple Rejection RR(dB) Ripple Rejection RR(dB) 70 COUT=tantal 4.7µF 80 100 100 COUT=tantal 2.2µF 80 Ripple Rejection RR(dB) Ripple Rejection RR(dB) 80 70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 Frequency f(kHZ) 100 RN5RZ RN5RZ40B Ripple Rejection RR(dB) 70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 40 30 20 10 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 RN5RZ50B RN5RZ50B COUT=tantal 2.2µF 50 40 0 0.1 50 Frequency f(kHZ) 60 10 60 0 0.1 100 70 20 70 Frequency f(kHZ) 80 30 COUT=tantal 10µF 80 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100 Frequency f(kHZ) 100 COUT=tantal 4.7µF 80 Ripple Rejection RR(dB) Ripple Rejection RR(dB) 80 Ripple Rejection RR(dB) RN5RZ40B COUT=tantal 4.7µF 70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100 Frequency f(kHZ) RN5RZ50B COUT=tantal 10µF Ripple Rejection RR(dB) 80 70 60 50 40 30 20 10 0 0.1 IOUT=1mA IOUT=30mA IOUT=50mA 1 10 100 Frequency f(kHZ) 13 RN5RZ 9) Ripple Rejection vs. Input Voltage (DC bias) RN5RZ30B IOUT =10mA RN5RZ30B IOUT =1mA COUT=tantal 10µF 60 50 40 30 f=400Hz 20 f=1kHz 10 f=10kHz 0 3.1 3.2 3.3 3.4 COUT=tantal 10µF 70 Ripple Rejection RR(dB) Ripple Rejection RR(dB) 70 60 50 40 30 f=400Hz 20 f=1kHz 10 f=10kHz 0 3.1 3.5 3.2 3.3 3.4 Input Voltage VIN(V) Input Voltage VIN(V) RN5RZ30B IOUT =50mA COUT=tantal 10µF Ripple Rejection RR(dB) 70 60 50 40 30 f=400Hz 20 f=1kHz 10 f=10kHz 0 3.1 3.2 3.3 3.4 3.5 Input Voltage VIN(V) 10) Line Transient Response tr=tf=5µS COUT=Ceramic 2.2µF+ESR 1Ω 6 Input Voltage 3.3 3.2 4 3.1 3 Output Voltage 3.0 2 2.9 1 2.8 –10 0 10 20 30 40 50 Time t(µS) 14 5 60 70 80 90 0 100 Input Voltage VIN(V) Output Voltage VOUT(V) 3.4 3.5 RN5RZ tr=tf=5µS COUT=Tantal 3.3µF 6 3.3 5 Input Voltage 3.2 4 3.1 3 Output Voltage 3.0 2 2.9 1 2.8 –10 Input Voltage VIN(V) Output Voltage VOUT(V) 3.4 0 10 20 30 40 50 60 70 80 90 0 100 Time t(µS) tr=tf=5µS COUT=Tantal 10µF 6 3.3 5 Input Voltage 4 3.2 3.1 3 Output Voltage 3.0 2 2.9 1 2.8 –10 0 10 20 30 40 50 60 70 80 90 Input Voltage VIN(V) Output Voltage VOUT(V) 3.4 0 100 Time t(µS) 11) Load Transient Response COUT=Ceramic 2.2µF+ESR 1Ω 150 Output Current 3.3 100 3.2 50 Output Voltage 3.1 0 3.0 –50 2.9 –100 2.8 –10 0 10 20 30 40 50 60 70 80 90 Output Current IOUT(mA) Output Voltage VOUT(V) 3.4 –150 100 Time t(µS) 15 RN5RZ COUT=Tantal 2.2µF 150 3.3 100 Output Current 3.2 50 Output Voltage 3.1 0 3.0 –50 2.9 –100 2.8 –10 0 10 20 30 40 50 60 70 80 90 Output Current IOUT(mA) Output Voltage VOUT(V) 3.4 –150 100 Time t(µS) COUT=Tantal 3.3µF Output Voltage VOUT(V) 3.3 100 Output Current 50 3.2 Output Voltage 3.1 0 3.0 –50 2.9 –100 2.8 –10 0 10 20 30 40 50 60 70 80 90 Output Current IOUT(mA) 150 3.4 –150 100 Time t(µS) COUT=Tantal 10µF 150 3.3 3.2 50 Output Voltage 3.1 0 3.0 –50 2.9 –100 2.8 –10 0 10 20 30 40 50 Time t(µS) 16 100 Output Current 60 70 80 90 –150 100 Output Current IOUT(mA) Output Voltage VOUT(V) 3.4 RN5RZ FOR STABLE OPERATION • Countermeasure for Noise 2 VIN VOUT 3 Ceramic Capacitor RN5RZ SERIES VIN 5 CE S.A. Spectrum Analyzer GND 1 ESR IOUT Ceramic capacitor 0.01µF Measuring circuit for white noise ; RN5RZ30B The relation between output current (IOUT) and Equivalent Series Resistance (ESR) in the output capacitor are described below. The conditions when the noise level is under 40µV (Avg.) are marked as the hatched area in the graph. [Measuring conditions] Frequency band : 0Hz to 1MHz Temperature : 25˚C Ceramic Capacitor 1µF Ceramic Capacitor 2.2µF : Noise level is under 40µV 100.0 10.0 ESR(W) ESR(W) 10.0 1.0 0.1 0.0 0.0 : Noise level is under 40µV 100.0 1.0 0.1 20.0 40.0 60.0 80.0 Output Current IOUT(mA) 100.0 0.0 0.0 20.0 40.0 60.0 80.0 100.0 Output Current IOUT(mA) 17 RN5RZ Ceramic Capacitor 10µF Ceramic Capacitor 4.7µF : Noise level is under 40µV 100.0 10.0 ESR(W) ESR(W) 10.0 1.0 1.0 0.1 0.1 0.0 0.0 : Noise level is under 40µV 100.0 20.0 40.0 60.0 80.0 100.0 0.0 0.0 20.0 40.0 60.0 80.0 100.0 Output Current IOUT(mA) Output Current IOUT(mA) APPLICATION HINTS When using these ICs, be sure to take care regarding the following points : • In these ICs, phase compensation is made for securing stable operation even when the load current is varied. For this purpose, be sure to use a capacitor COUT with good frequency characteristics and ESR in the range described above. • Make VDD and GND line sufficient. When the impedance of these is high, the noise may be picked up or operation may become unstable. • Connect the capacitor with a capacitance of about 1µF between VDD and GND with wiring as short as possible. • Set external components as close as possible to the ICs and make wiring short. 18 RN5RZ POWER DISSIPATION The power dissipation of RN5RZ series (SOT-23-5) is measured. The measuring conditions as follows: 15.0 Material : glass cloth epoxy plastic Size of the board : 15×15×1.6mm Wind velocity : 0m/s Mounted with solder 1.0 1.3 0.7 15.0 1.0 Unit : mm RN5RZ30B(SOT-23-5) Power Dissipation PD(mW) 450 400 350 300 Mounted on the board 250 200 Free air 150 100 50 0 0 25 50 75 100 125 150 Ambient Temperature Topt(˚C) 19 RN5RZ PACKAGE DIMENSION (Unit : mm) • SOT-23-5 2.9±0.2 1 2 2.8±0.3 4 +0.2 1.6 –0.1 5 0.8±0.1 0.2 MIN. +0.2 1.1 –0.1 1.9±0.2 (0.95) (0.95) 0 to 0.1 3 0.4±0.1 +0.1 0.15 –0.05 TAPING SPECIFICATION (Unit : mm) • SOT-23-5 4.0±0.1 ø 1.5+0.1 –0 2.0±0.05 3.2 3.3 4.0±0.1 2.0MAX. TL TR User Direction of Feed. 20 8.0±0.3 3.5±0.05 1.75±0.1 0.3±0.1 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 SAN JOSE OFFICE 3001 Orchard Parkway, San Jose, CA 95134-2088, U.S.A. Phone 1-408-432-8800 Fax 1-408-432-8375