Ricoh RV5VH Applications Manual
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Ricoh RV5VH Applications Manual

Ricoh RV5VH Applications Manual

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DC/DC CONVERTER
CONTROLLER
RV5VH SERIES
APPLICATION MANUAL
ELECTRONIC DEVICES DIVISION
NO. EA-049-9803

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  • Page 1 DC/DC CONVERTER CONTROLLER RV5VH SERIES APPLICATION MANUAL ELECTRONIC DEVICES DIVISION NO. EA-049-9803...
  • Page 2 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.).

  • Page 3: Table Of Contents

    RV5VH SERIES APPLICATION MANUAL CONTENTS OUTLINE FEATURES APPLICATIONS RV5VH1 /RV5VH2 BLOCK DIAGRAMS PIN CONFIGURATION PIN DESCRIPTION ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS OPERATION OPERATION OF STEP-UP DC/DC CONVERTER SELECTION OF PERIPHERAL COMPONENTS TYPICAL APPLICATION TEST CIRCUITS TYPICAL CHARACTERISTICS • DC/DC Converter 1 1) Output Voltage vs.
  • Page 4 13) DC/DC2 Feed Back Voltage vs. Temperature 14) EXT2 Output Current vs. Temperature 15) EXT2 Oscillator Frequency vs. Temperature 16) EXT2 Oscillator Duty Cycle vs. Temperature 17) CSW ON/OFF Voltage vs. Temperature • Voltage Detector 18) Detector Threshold Voltage vs. Temperature 19) V Output Voltage vs.

  • Page 5: Outline

    ICs consist of an oscillator, two VFM control circuits, control transistors(EXT switches), a phase shift circuit, a voltage reference unit, an error amplifier, and voltage sensing resistors. The RV5VH series are housed in 8pin SSOP(0.65mm pitch) and suitable for two supply systems such as pager, PDA, which need power supplies for LCD.

  • Page 6: Rv5Vh1 /Rv5Vh2 Block Diagrams

    RV5VH1 / RV5VH2 BLOCK DIAGRAM OUT1 OUT1 EXT1 DC/DC CONVERTER CONTROLLER (BOOST / INVERTING) – Vref Error Amp.2 Error Amp.1 – VFM2 lim. p_shift VFM1 – Vref Error Amp.2 Error Amp.1 – VFM2 p_shift VFM1 – EXT2 – EXT2...

  • Page 7: Pin Configuration

    PIN DESCRIPTION • RV5VH1 Pin No. Symbol Control switch for DC/DC2 Sensing Pin for Voltage Detector Output for DC/DC1, Power supply for the device OUT1 Output for DC/DC1, switching (Nch Open-Drain) Ground EXT2 External Transistor drive pin for DC/DC2 (CMOS output)

  • Page 8: Absolute Maximum Ratings

    RV5VH1 /RV5VH2 ABSOLUTE MAXIMUM RATINGS • RV5VH1 Symbol Item Pin Voltage OUT1 OUT1 Pin Voltage Pin Voltage Pin Voltage CSW Pin Voltage EXT2 Pin Voltage EXT2 FB Pin Voltage Output Current EXT2 Output Current EXT2 Power Dissipation Topt Operating Temperature Tstg Storage Temperature Tsolder...
  • Page 9 • RV5VH2 Symbol Item Pin Voltage OUT1 OUT1 Pin Voltage Pin Voltage CSW Pin Voltage EXT1, 2 Pin Voltage EXT1, 2 FB Pin Voltage EXT1, 2 Output Current EXT1, 2 Power Dissipation Topt Operating Temperature Tstg Storage Temperature Tsolder Lead Temperature (Soldering) Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions.

  • Page 10: Electrical Characteristics

    RV5VH1 /RV5VH2 ELECTRICAL CHARACTERISTICS • RV5VH101 DC/DC Converter 1 Symbol Item Step-up Output Voltage OUT1 Maximum Input Voltage Vstart Oscillator Start-up Voltage Vhold Hold-on Input Voltage Supply Current1 * Switching Current Leakage Current LXleak fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle Efficiency Voltage Limit for L LXlim...
  • Page 11 DC/DC Converter 2 Symbol Item Set Output Voltage Feed Back Voltage Maximum Input Voltage Minimum Operating Voltage Supply Current2 Istandby Standby Current EXT2 “H” Output Current EXT2H EXT2 “L” Output Current EXT2L fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle CSW “H”...
  • Page 12 RV5VH1 /RV5VH2 Voltage Detector Symbol Item Detector Threshold Detector Threshold Hysteresis Supply Current3 Maximum Input Voltage Minimum Operating Voltage Output Current Sensing pin Input Current Sensing pin Input Voltage Output Delay OUT1 Detector Threshold Temp.Co. Topt Leakage Current DOUTleak =3.0V, Topt=25˚C, unless otherwise specified. (See Typical Application) OUT1 Conditions MIN.
  • Page 13 • RV5VH102 DC/DC Converter 1 Symbol Item Step-up Output Voltage OUT1 Maximum Input Voltage Vstart Oscillator Start-up Voltage Vhold Hold-on Input Voltage Supply Current1 * Switching Current Leakage Current LXleak fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle Efficiency Voltage Limit for L Switch LXlim OUT1...
  • Page 14 RV5VH1 /RV5VH2 DC/DC Converter 2 Symbol Item Set Output Voltage Feed Back Voltage Maximum Input Voltage Minimum Operating Voltage Supply Current2 Istandby Standby Current EXT2 “H” Output Current EXT2H EXT2 “L” Output Current EXT2L fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle CSW “H”...
  • Page 15 Voltage Detector Symbol Item Detector Threshold Detector Threshold Hysteresis Supply Current3* Maximum Input Voltage Minimum Operating Voltage* Output Current Sensing Pin Input Current Output Delay OUT1 Detector Threshold Temp.Co. Topt Leakage Current DOUTleak =3.0V, Topt=25˚C, unless otherwise specified. (See Typical Application) OUT1 Conditions =0.5V, V...
  • Page 16 RV5VH1 /RV5VH2 • RV5VH201 DC/DC Converter 1 Symbol Item Step-up Output Voltage OUT1 Maximum Input Voltage Vstart Oscillator Start-up Voltage Vhold Hold-on Input Voltage Supply Current1 * EXT1 “H” Output Current EXT1H EXT1 “L” Output Current EXT1L fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle OUT1...
  • Page 17 DC/DC Converter 2 Symbol Item Output Voltage Setting Range Feed Back Voltage Maximum Input Voltage Minimum Operating Voltage* Supply Current2* Istandby Standby Current EXT2 “H” Output Current EXT2H EXT2 “L” Output Current EXT2L fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle CSW “H”...
  • Page 18 RV5VH1 /RV5VH2 Voltage Detector Symbol Item Detector Threshold Detector Threshold Hysteresis Supply Current3* Maximum Input Voltage Minimum Operating Voltage* Output Current Sensing Pin Input Current Output Delay OUT1 Detector Threshold Temp. Co. Topt Leakage Current DOUTleak =3.0V : unless otherwise specified. (See Typical Application) OUT1 1 ) This value only shows the supply current of voltage detector.
  • Page 19 • RV5VH202 DC/DC Converter 1 Symbol Item Step-up Output Voltage OUT1 Maximum Input Voltage Vstart Oscillator Start-up Voltage Vhold Hold-on Input Voltage Supply Current1 * EXT1 “H” Output Current EXT1H EXT1 “L” Output Current EXT1L fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle Efficiency OUT1...
  • Page 20 RV5VH1 /RV5VH2 DC/DC Converter 2 Symbol Item Output Voltage Setting Range Feed Back Voltage Maximum Input Voltage Minimum Operating Voltage* Supply Current2* Istandby Standby Current EXT2 “H” Output Current EXT2H EXT2 “L” Output Current EXT2L fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle CSW “H”...
  • Page 21 Voltage Detector Symbol Item Detector Threshold Detector Threshold Hysteresis Supply Current3* Maximum Input Voltage Minimum Operating Voltage* Output Current Sensing Pin Input Current Output Delay OUT1 Detector Threshold Temp.Co. Topt Leakage Current DOUTleak =5.0V : unless otherwise specified. (See Typical Application) OUT1 1 ) This value only shows the supply current of voltage detector.

  • Page 22: Operation

    RV5VH2 p_shift The DC/DC1 uses input voltage as an initial power supply, once boost operation is started the boost output will be used for the power supply of device itself. A change in the V age setting resistors and internal feed back resistors. When the feed back voltage is lower than the reference voltage the error amplifier enables oscllation or otherwise will stop oscillation.
  • Page 23 Error Amp.2 VFM2 The DC/DC2 can operate by a voltage of “V through external voltage setting resistors. The reference voltage should be provided from externally fixed power supply such as V OUT1 When the feed back voltage to the cmp2 is higher than the ground voltage the error amplifier enables oscillation or other- wise will stop oscillation.
  • Page 24 RV5VH1 /RV5VH2 • Voltage Detector RV5VH1 Vref Tr.1 The VD can operate by the voltage of “V trimmed resistors and the VD monitors V The D is Nch-opendrain output and a pull up resistor is necessary. Oepration Diagram pin is pulled up to V Reset Voltage Detector Threshold –V...

  • Page 25: Operation Of Step-Up Dc/Dc Converter

    OPERATION OF STEP-UP DC/DC CONVERTER Step-up DC/DC Converter charges energy in the inductor when Lx Transistor (LxTr) is on, and discharges the energy with the addition of the energy from Input Power Source thereto, so that a higher output voltage than the input voltage is obtained.

  • Page 26: Selection Of Peripheral Components

    Schottky type diode) be taken into consideration. When I and V exceed their respective ratings, use the RV5VH with the attachment of an external tran- sistor with a low saturation voltage thereto. charged in the inductor is provided by Equation 2 as follows : ·...

  • Page 27: Typical Application

    TYPICAL APPLICATION • RV5VH1 Output DC/DC1 <Components> CoiIs Diodes Capacitors Resistors • RV5VH2 Output DC/DC1 NPN Tr. <Components> Coils Diodes Capacitors PMOS NPN Tr. Resistors EXT2 OUT1 L1 : 100µH, L2 : 220µH Schottky type C1, C2 : 22µF(tantalum type), C3 : 0.01µF(ceramic type) PMOS : 2SJ238 R1, R2 : several hundreds k , R3 : 100k EXT2...

  • Page 28: Test Circuits

    RV5VH1 /RV5VH2 TEST CIRCUITS 22 F EXT2 OUT1 Fig.1 Test Circuit 1 EXT2 OUT1 (150 ) (EXT1) Oscilloscope Fig.2 Test Circuit 2 EXT2 OUT1 Fig.3 Test Circuit 3 L1=100 H,220 H 100k EXT1 0.5V...
  • Page 29 Pulse Input 96 F Test Circuit 1: Typical Characteristics 1), 3), 5), 10), 11) Test Circuit 2: Typical Characteristics 6), 7), 8), 9), 13), 14), 15), 16), 17), 18), 19), 21) Test Circuit 3: Typical Characteristics 20) Test Circuit 4: Typical Characteristics 22) Test Circuit 5: Typical Characteristics 2), 4)

  • Page 30: Typical Characteristics

    RV5VH1 /RV5VH2 TYPICAL CHARACTERISTICS • DC/DC Converter 1 1) Output Voltage vs. Output Current (RV5VH1 RV5VH101 =1.2V =0.9V Output Current I RV5VH102 =1.5V =2.0V =0.9V Output Current I 2) Output Voltage vs. Output Current (RV5VH2 RV5VH201 =1.2V =0.9V Output Current I Topt=25˚C L1=100 H C1=22 F...

  • Page 31: Efficiency Vs. Output Current (Rv5Vh1 )

    3) Efficiency vs. Output Current (RV5VH1 RV5VH101 =1.2V =0.9V 0.01 Output Current I RV5VH102 =1.5V =0.9V Output Current I 4) Efficiency vs. Output Current (RV5VH2 RV5VH201 =1.5V =2.0V =1.2V =0.9V 0.01 Output Current I Topt=25˚C L1=100 H C1=22 F =2.0V =1.5V 0.01 (mA)

  • Page 32: Dc/Dc1 Output Voltage Vs. Temperature

    RV5VH1 /RV5VH2 5) DC/DC1 Output Voltage vs. Temperature RV5VH1 =10mA =5mA –60 –40 –20 Temperature Topt(˚C) 6) Oscillator Frequency vs. Temperature RV5VH1 –60 –40 –20 Temperature Topt(˚C) 7) Oscillator Duty Cycle vs. Temperature RV5VH1 –60 –40 –20 Temperature Topt(˚C) =1.2V L1=100 H C1=22 F 80 100...

  • Page 33: On Resistance Of Lx Vs. Supply Voltage

    8) On Resistance of LX vs. Supply Voltage RV5VH1 85˚C 25˚C –40˚C Supply Voltage V 9) EXT1 Output Current vs. Temperature RV5VH201 “L” Output Current Output Current “H” –60 –40 –20 Temperature Topt(˚C) 10) Start-up/Hold-on Voltage vs. Output Current RV5VH1 Vstart Vhold Output Current I...

  • Page 34: Output Voltage Vs. Output Current

    RV5VH1 /RV5VH2 • DC/DC Converter 2 12) Output Voltage vs. Output Current RV5VH101 –2 –4 –6 –8 –9V –10 –12V –12 –14 Output Current I 13) DC/DC2 Feed Back Voltage vs. Temperature RV5VH1 0.010 0.008 0.006 0.004 0.002 0.000 –0.002 –0.004 –0.006 –0.008...

  • Page 35: Ext2 Oscillator Frequency Vs. Temperature

    15) EXT2 Oscillator Frequency vs. Temperature RV5VH1 –60 –40 –20 Temperature Topt(˚C) 16) EXT2 Oscillator Duty Cycle vs. Temperature RV5VH1 –60 –40 –20 Temperature Topt(˚C) 17) CSW ON/OFF Voltage vs. Temperature RV5VH1 –60 –40 –20 Temperature Topt(˚C) OUT1 80 100 –60 –40 –20 OUT1 80 100...

  • Page 36: Voltage Detector

    RV5VH1 /RV5VH2 • Voltage Detector 18) Detector Threshold Voltage vs. Temperature RV5VH1 –V –60 –40 –20 Temperature Topt(˚C) 20) D Output Current vs. V RV5VH1 Output Voltage V OUT1 22) Output Delay Time vs. Load Capacitance RV5VH1 0.01 0.0001 0.001 Load Capacitance C 19) V OUT1...

  • Page 37: Rv5Vh3

    RV5VH3 BLOCK DIAGRAM EXT1 PIN CONFIGURATION DC/DC CONVERTER CONTROLLER (BOOST / INVERTING OUTPUT FOR LCD) – – Vref Error Amp.2 – VFM2 Error Amp.1 p_shift VFM1 • 8 pin SSOP (0.65mm pitch) EXT2...

  • Page 38: Pin Description

    PIN DESCRIPTION Pin No. Symbol Control Switch for DC/DC1, 2 Input for DC/DC1 Error Amplifier Power Supply for Device Itself. Sensing Pin for Reset. EXT1 External Transistor Drive Pin for DC/DC1 (CMOS Output) Ground Pin EXT2 External Transistor Drive Pin for DC/DC2 (CMOS Output)

  • Page 39: Electrical Characteristics

    ELECTRICAL CHARACTERISTICS • RV5VH301 DC/DC Converter 1 Symbol Item Output Voltage Setting 1 SET1 Feed Back Volatage 1 Maximum Input Voltage Minimum Operating Voltage Supply Current11* SS11 Supply Current12* SS12 Istandby Standby Current* EXT1 “H” Output Current EXT1H EXT1 “L” Output Current EXT1L fosc Maximum Oscillator Frequency...
  • Page 40 RV5VH3 DC/DC Converter 2 Symbol Item Output Voltage Setting 1 SET2 Feed Back Volatage 1 Maximum Input Voltage Minimum Operating Voltage Supply Current21* SS21 Supply Current22* SS22 EXT2 “H” Output Current EXT2H EXT2 “L” Output Current EXT2L fosc Maximum Oscillator Frequency Maxdty Oscillator Duty Cycle Feed Back Voltage Temp.Co.
  • Page 41 Voltage Detector Symbol Item Detector Threshold Detector Threshold Hysteresis Supply Current3* Maximum Input Voltage Minimum Operating Voltage Output Current Output Delay OUT1 Detector Threshold Temp.Co Topt Leakage Current DOUTleak =3.0V : unless otherwise specified. 1 ) This value only shows the supply current of voltage detector. Conditions MIN.

  • Page 42: Operation

    RV5VH3 OPERATION • DC/DC Converter 1 RV5VH3 p_shift VFM1 The DC/DC1 can operate by an input voltage to the V amplifier through external voltage setting resistors and internal feed back resistors. When the feed back voltage is lower than the reference voltage the error amplifier enables oscillation or otherwise will stop oscillation. The internal feed back resistor “R”...
  • Page 43 • DC/DC Converter 2 RV5VH3 Error Amp.2 VFM2 The DC/DC2 can operate by an input voltage to the V amplifier through external voltage setting resistors. The V ply such as V OUT1 When the feed back voltage to the Error Amp.2 is higher than the ground voltage the error amplifier enables oscillation or otherwise will stop oscillation.
  • Page 44 RV5VH3 • Voltage Detector RV5VH3 Tr.1 The Voltage Detector can operate by an input voltage to the V are internally adjusted by trimmed resistors and the VD monitors V The D is Nch-opendrain output and a pull up resistor is necessary. Oepration Diagram The output is pulled up to V Reset Voltage...

  • Page 45: Typical Application1

    TYPICAL APPLICATION 1 Output DC/DC 1 NPN Tr. CoiI Diode capacitor PMOS NMOS Resistor EXT2 EXT1 L1 : 100µH, L2 : 100µH Schottky type C1 : 22µF(Ta), C2 : 22µF(Ta) C3 : 0.01µF (ceramic) C4 : 0.01µF (ceramic) C5 : 0.01µF (ceramic) 2SJ238 (TOSHIBA) 2SK1470 (SANYO) R1 : 100K , R2 : 0 to 500K...

  • Page 46: Typical Application2

    RV5VH3 TYPICAL APPLICATION 2 Output DC/DC 1 NPN Tr. CoiI Diode capacitor PMOS NPN Tr. Resistor Description • Step up DC/DC converter : DC/DC1 The oscillator can operate when CSW is “H”. When the CSW is “L” the EXT1 outputs GND. The output voltage can be adjusted by R5 and R6 with FB1 of two volt.

  • Page 47: Typical Application3

    TYPICAL APPLICATION 3 Output DC/DC 1 PMOS SBD1 NMOS R1 : 820k , R2 : 820k , R3 : 100k , R4 : 1k , R5 : 750k (AdjustabIe) R6 : 100k L1 : 68µH, L2 : 27µH C1 : 22µF, C2 : 22µF, C3 : 1000pF, C4 : 2200pF, C5 : 1000pF PMOS : 2SJ238, NMOS : 2SK1470, PNPTr.

  • Page 48: Typical Characteristics

    RV5VH3 TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current –5 –10 –15 –20 –25 Output Current I 3) CSW Load Transient Responce 1 OUT1 –5 –10 –15 OUT2 –20 –50 Time t(ms) ) Please refer to Typical Application. 2) Efficiency vs. Output Current =3.6V 0.0001 (mA)

  • Page 49: Selection Guide

    SELECTION GUIDE The output voltage, the type of DC/DC1 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: RV5VH – Part Number...

  • Page 50: Package Dimension

    RV5VH3 PACKAGE DIMENSIONS • 8 pin SSOP (0.65mm pitch) 0.575 TYP. 0.65 TAPING SPECIFICATION • 8 pin SSOP (0.65mm pitch) 0.3 0.1 2.7MAX. (Unit : mm) 3.1 0.3 0.22 0.1 0.15 0.15 (Unit : mm) ø1.5 8.0 0.1 User Direction of Feed 0.5 0.3 4.0 0.1 +0.1...
  • Page 51 When using these ICs, be sure to take care of the following points. • Set external components as close as possible to the IC and minimize the connection between the components and the IC. In particular, when an external component is connected to VOUT Pin, make minimum connection with the capacitor.
  • Page 52 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.

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Rv5vh1 seriesRv5vh2 seriesRv5vh3 series

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