Ricoh RV5VH Manuel d'utilisateur

APPLICATION MANUALDC/DC CONVERTERCONTROLLERRV5VH SERIESNO. EA-049-9803ELECTRONIC DEVICES DIVISION

RV5VH1××/RV5VH2××6ELECTRICAL CHARACTERISTICS• RV5VH101DC/DC Converter 1*) VIN=1.2V, IOUT=10mA, Topt=25˚C, unless otherwise specified. (See Typical App

7RV5VH1××/RV5VH2××DC/DC Converter 2Symbol Item Conditions MIN. TYP. MAX. UnitVSET Set Output Voltage *10 VVFB Feed Back Voltage –20 0 20 mVVINMaximum

RV5VH1××/RV5VH2××8Symbol Item Conditions MIN. TYP. MAX. UnitVDET Detector Threshold 2.633 2.700 2.767 VVHYS Detector Threshold Hysteresis 0.081 0.135

9RV5VH1××/RV5VH2×ו RV5VH102DC/DC Converter 1*) VIN=1.2V, IOUT=10mA, Topt=25˚C, unless otherwise specified. (See Typical Application)*1 ) This value o

RV5VH1××/RV5VH2××10DC/DC Converter 2VOUT1=5.0V, Topt=25˚CSymbol Item Conditions MIN. TYP. MAX. UnitVSET Set Output Voltage *1–3.000 0 VVFB Feed Back V

11RV5VH1××/RV5VH2××Voltage DetectorVOUT1=5.0V, Topt=25˚CSymbol Item Conditions MIN. TYP. MAX. UnitVDET Detector Threshold 4.388 4.500 4.612 VVHYS Dete

RV5VH1××/RV5VH2××12Symbol Item Conditions MIN. TYP. MAX. UnitVOUT1 Step-up Output Voltage IOUT=0mA 2.925 3.000 3.075 VVINmax Maximum Input Voltage 10

13RV5VH1××/RV5VH2××Symbol Item Conditions MIN. TYP. MAX. UnitVSET Output Voltage Setting Range *10 VVFB Feed Back Voltage –20 0 20 mVVIN Maximum Input

RV5VH1××/RV5VH2××14Voltage DetectorVOUT1=3.0V, Topt=25˚CSymbol Item Conditions MIN. TYP. MAX. UnitVDET Detector Threshold 2.633 2.700 2.767 VVHYS Dete

15RV5VH1××/RV5VH2×ו RV5VH202DC/DC Converter 1VOUT1=5.0V, Topt=25˚C*) VIN=3.0V, IOUT=10mA : unless otherwise specified. (See Typical Application)*1 )

NOTICE1. The products and the product specifications described in this application manual are subject to change ordiscontinuation of production withou

RV5VH1××/RV5VH2××16DC/DC Converter 2*) VOUT1=5.0V, VOUT2=–3.0V, IOUT2=1mA : unless otherwise specified. (See Typical Application)*1 ) Adjustable by ex

17RV5VH1××/RV5VH2××Voltage DetectorVOUT1=5.0V, Topt=25˚C*) VOUT1=5.0V : unless otherwise specified. (See Typical Application)*1 ) This value only show

RV5VH1××/RV5VH2××18OPERATION• DC/DC Converter 1The DC/DC1 uses input voltage as an initial power supply, once boost operation is started the boost out

19RV5VH1××/RV5VH2××C1LFBVOUT2VOUT1EXT2+–RV5VH1××/RV5VH2××Error Amp.2VFM2CSW617SBD+PMOSOSCC2 R2R1The DC/DC2 can operate by a voltage of “VOUT1”. A cha

RV5VH1××/RV5VH2××20VSENDOUTRV5VH1××/RV5VH2××Pull-upOutput Tr.–+VrefRaRbRcTr.128The VD can operate by the voltage of “VOUT1”. The detector threshold a

21RV5VH1××/RV5VH2××OPERATION OF STEP-UP DC/DC CONVERTERStep-up DC/DC Converter charges energy in the inductor when Lx Transistor (LxTr) is on, and dis

RV5VH1××/RV5VH2××22The above explanation is directed to the calculation in an ideal case where it is supposed that there is noenergy loss in the exter

23RV5VH1××/RV5VH2××<Components> Coils L1 : 27µH, L2 : 220µHDiodes Schottky typeCapacitors C1 : 47µF(tantalum type), C2 : 22µF(tantalum type)C3 :

RV5VH1××/RV5VH2××24TEST CIRCUITSCSW DOUTFBEXT2L1=100µH,220µHGNDVSENVOUT1LX1L1V22µFAFig.1 Test Circuit 1CSW DOUTFBEXT2GNDVSENVOUT1LX1(EXT1)100kΩ150Ω

25RV5VH1××/RV5VH2××Test Circuit 1: Typical Characteristics 1), 3), 5), 10), 11)Test Circuit 2: Typical Characteristics 6), 7), 8), 9), 13), 14), 15)

RV5VH SERIESAPPLICATION MANUALCONTENTSOUTLINE...1FE

RV5VH1××/RV5VH2××26TYPICAL CHARACTERISTICS• DC/DC Converter 11) Output Voltage vs. Output Current (RV5VH1××)RV5VH1013.63.43.22.83.02.42.62.22.0Output

27RV5VH1××/RV5VH2××3) Efficiency vs. Output Current (RV5VH1××)RV5VH10110075808590956570556050Output Current IOUT(mA)Efficiency η(%)0.01 0.1 1 10 100To

RV5VH1××/RV5VH2××285) DC/DC1 Output Voltage vs. TemperatureRV5VH1××/2××3.33.03.23.12.92.82.7Temperature Topt(˚C)Output Voltage VOUT(V)–60 –40 –20 0 20

29RV5VH1××/RV5VH2××8) On Resistance of LX vs. Supply VoltageRV5VH1××5.04.04.52.53.02.03.50.01.51.00.5Supply Voltage VOUT1(V)On Resistance Ron (Ω)0.0 1

RV5VH1××/RV5VH2××3012) Output Voltage vs. Output CurrentRV5VH1010–2–4–6–14–10–12–8Output Current IOUT(mA)Output Voltage VOUT(V)0 4 86 10 122 14Topt=25

31RV5VH1××/RV5VH2××15) EXT2 Oscillator Frequency vs. TemperatureRV5VH1××/2××150100115120125130135140145110105Temperature Topt(˚C)Oscillator Frequency

RV5VH1××/RV5VH2××3218) Detector Threshold Voltage vs. TemperatureRV5VH1××/2××3.02.52.72.82.92.6Temperature Topt(˚C)Detector Threshold Voltage VDET(V)–

33BLOCK DIAGRAM+–+–CSWFB1VDDEXT1DOUTFB2EXT2GNDVrefError Amp.1Error Amp.212348765VFM2VFM1 OSCp_shift+–DC/DC CONVERTER CONTROLLER(BOOST / INVERTING OUTP

RV5VH3××34PIN DESCRIPTIONABSOLUTE MAXIMUM RATINGSAbsolute Maximum ratings are threshold limit values that must not be exceeded even for an instant un

35RV5VH3××Symbol Item Conditions MIN. TYP. MAX. UnitVSET1 Output Voltage Setting 1 2.05 *1VVFB1 Feed Back Volatage 1 1.950 2.000 2.050 VVINmax Maximum

13) DC/DC2 Feed Back Voltage vs. Temperature...3014) EXT2 Output Current vs. Temperature...

RV5VH3××36DC/DC Converter 2Symbol Item Conditions MIN. TYP. MAX. UnitVSET2 Output Voltage Setting 1 *10 VVFB2 Feed Back Volatage 1 –20 0 20 mVVINmax M

37RV5VH3××Voltage DetectorSymbol Item Conditions MIN. TYP. MAX. UnitVDET Detector Threshold 2.633 2.700 2.767 VVHYS Detector Threshold Hysteresis 0.08

RV5VH3××38OPERATION• DC/DC Converter 1The DC/DC1 can operate by an input voltage to the VDD pin. A change in the VOUT1 will feed back to the internal

39RV5VH3×ו DC/DC Converter 2The DC/DC2 can operate by an input voltage to the VDD pin. A change in the VOUT2 will feed back to the internal erroramp

RV5VH3××40DOUTRV5VH3××Pull-upOutput Tr.–+VrefR1R2R3Tr.138VDDThe Voltage Detector can operate by an input voltage to the VDD pin. The detector thresho

41RV5VH3××TYPICAL APPLICATION 1CSWFB1VDDEXT1DOUTFB2EXT2GNDOutput DC/DC 2Output DC/DC 1C2L2PMOSR3R1R2C3SBDC1NPN Tr.SBDR6R4C4R5C5L1CoiI L1 : 100µH, L2 :

RV5VH3××42CSWFB1VDDEXT1DOUTFB2EXT2GNDC2L2PMOSR3R1VINR2C3SBDC1NPN Tr.SBDR6R4C4R5C5L1Output DC/DC 2Output DC/DC 1TYPICAL APPLICATION 2CoiI L1 : 100µH, L

43RV5VH3××CSWFB1VDDEXT1DOUTFB2EXT2GNDC2L2R3R1R2C3SBD3C1PNP Tr.SBD1R6R5C5L1R4C4NMOSPMOSVINSBD2Output DC/DC 2Output DC/DC 1R1 : 820kΩ, R2 : 820kΩ, R3 :

RV5VH3××44TYPICAL CHARACTERISTICS1) Output Voltage vs. Output Current2515105–5–15–20–10200–25Output Current IOUT(mA)Output Voltage VOUT(V)0 10 20VIN=3

45RV5VH3××SELECTION GUIDEThe output voltage, the type of DC/DC1 and the taping type for the ICs can be selected at the user's request.The selecti

1DC/DC CONVERTER CONTROLLERRV5VH SERIESOUTLINEThe RV5VH series are dual output CMOS DC/DC converter ICs integrating Step-up and inverting DC/DC conver

RV5VH3××46PACKAGE DIMENSIONS (Unit : mm)TAPING SPECIFICATION (Unit : mm)• 8 pin SSOP (0.65mm pitch)0.575 TYP.3.1±0.36.4±0.34.4±0.20.22±0.10.5±0.31.15±

47RV5VH3××APPLICATION HINTSWhen using these ICs, be sure to take care of the following points.• Set external components as close as possible to the IC

RICOH COMPANY, LTD.ELECTRONIC DEVICES DIVISIONHEADQUARTERS13-1, Himemuro-cho, Ikeda City, Osaka 563-8501, JAPANPhone 81-727-53-1111 Fax 81-727-53-60

2BLOCK DIAGRAM+–+–CSWVSENVOUT1LX1DOUTFBEXT2GNDVrefError Amp.1Error Amp.212348765VFM2VLX lim.VFM1 OSCp_shift+–DC/DC CONVERTER CONTROLLER(BOOST / INVERT

3RV5VH1××/RV5VH2××PIN CONFIGURATION12348765• 8 pin SSOP (0.65mm pitch)PIN DESCRIPTION• RV5VH1××Pin No. Symbol Description1 CSW Control switch for DC/D

RV5VH1××/RV5VH2××4ABSOLUTE MAXIMUM RATINGS• RV5VH1××Symbol Item Ratings UnitVOUT1 VOUT1 Pin Voltage 12 VVLX1 LX1 Pin Voltage 12 VVSEN VSEN Pin Voltage

5RV5VH1××/RV5VH2××ABSOLUTE MAXIMUM RATINGSAbsolute Maximum ratings are threshold limit values that must not be exceeded even for an instant underany