APPLICATION MANUAL CONVERTER RV5VH

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APPLICATION MANUAL

DC/DC CONVERTER

CONTROLLER

RV5VH SERIES

NO. EA-049-9803

ELECTRONIC DEVICES DIVISION

Summary of content (52 pages)

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DC/DC CONVERTER CONTROLLER RV5VH SERIES APPLICATION MANUAL ELECTRONIC DEVICES DIVISION NO.
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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.
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RV5VH SERIES APPLICATION MANUAL CONTENTS OUTLINE ......................................................................................................1 FEATURES ...................................................................................................1 APPLICATIONS .............................................................................................1 RV5VH1××/RV5VH2×× BLOCK DIAGRAMS ...................................................................................2 PIN CONFIGURATION...
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13) DC/DC2 Feed Back Voltage vs. Temperature ...................................................30 14) EXT2 Output Current vs. Temperature ...........................................................30 15) EXT2 Oscillator Frequency vs. Temperature ....................................................31 16) EXT2 Oscillator Duty Cycle vs. Temperature ....................................................31 17) CSW ON/OFF Voltage vs. Temperature ........................................................
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DC/DC CONVERTER CONTROLLER RV5VH SERIES OUTLINE The RV5VH series are dual output CMOS DC/DC converter ICs integrating Step-up and inverting DC/DC converters. The RV5VH3×× series 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.
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DC/DC CONVERTER CONTROLLER (BOOST / INVERTING) RV5VH1×× / RV5VH2×× BLOCK DIAGRAM – CSW 1 8 DOUT + VSEN 2 Vref Error Amp.2 VOUT1 3 Error Amp.1 – – + VFM2 7 FB 6 EXT2 + VLX lim. LX1 4 p_shift VFM1 5 GND OSC – CSW 1 8 DOUT + VSEN 2 Vref Error Amp.2 VOUT1 3 Error Amp.
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RV5VH1××/RV5VH2×× PIN CONFIGURATION • 8 pin SSOP (0.65mm pitch) 1 2 3 4 8 7 6 5 PIN DESCRIPTION • RV5VH1×× Pin No. Symbol Description 1 CSW Control switch for DC/DC2 2 VSEN Sensing Pin for Voltage Detector 3 VOUT1 Output for DC/DC1, Power supply for the device 4 LX1 Output for DC/DC1, switching (Nch Open-Drain) 5 GND Ground 6 EXT2 External Transistor drive pin for DC/DC2 (CMOS output) 7 FB 8 DOUT Input for DC/DC2 Error Amplifier Output for Voltage detector • RV5VH2×× Pin No.
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RV5VH1××/RV5VH2×× ABSOLUTE MAXIMUM RATINGS • RV5VH1×× Symbol Ratings Unit VOUT1 Pin Voltage 12 V VLX1 LX1 Pin Voltage 12 V VSEN VSEN Pin Voltage 12 V DOUT DOUT Pin Voltage 12 V VCSW CSW Pin Voltage –0.3 to VOUT1 +0.3 V VEXT2 EXT2 Pin Voltage –0.3 to VOUT1 +0.3 V VFB FB Pin Voltage –0.3 to VOUT1 +0.
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RV5VH1××/RV5VH2×× • RV5VH2×× Symbol Item Ratings Unit VOUT1 VOUT1 Pin Voltage 12 V VSEN VSEN Pin Voltage 12 V DOUT DOUT Pin Voltage 12 V VCSW CSW Pin Voltage –0.3 to VOUT1 +0.3 V EXT1, 2 Pin Voltage –0.3 to VOUT1 +0.3 V FB Pin Voltage –0.3 to VOUT1 +0.
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RV5VH1××/RV5VH2×× ELECTRICAL CHARACTERISTICS • RV5VH101 DC/DC Converter 1 Symbol VOUT1=3.0V, Topt=25˚C Item VOUT1 Step-up Output Voltage VINmax Maximum Input Voltage Vstart Oscillator Start-up Voltage Vhold Hold-on Input Voltage ISS1 Supply Current1 *1 ILX LX Switching Current ILXleak fosc Maxdty η VLXlim ∆VOUT1 ∆Topt LX Leakage Current Conditions TYP. MAX. Unit 2.925 3.000 3.075 V 10 V 0.8 V No Load IOUT=1mA, VIN : 2→0V 0.7 0.7 No Load, CSW=“L” VLX=0.
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RV5VH1××/RV5VH2×× DC/DC Converter 2 Symbol VOUT1=3.0V, Topt=25˚C Item Conditions MIN. VSET Set Output Voltage *1 VFB Feed Back Voltage –20 VIN Maximum Input Voltage VOPTmin Minimum Operating Voltage TYP. 0 IOUT=1mA MAX. Unit 0 V 20 mV 10 V 1.8 V ISS2 Supply Current2 CSW= “H” at No Load 10 µA Istandby Standby Current CSW=“L” 0.3 µA IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V 2 4 mA IEXT2L EXT2 “L” Output Current VEXT2=0.
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RV5VH1××/RV5VH2×× Voltage Detector VOUT1=3.0V, Topt=25˚C Symbol Item Conditions TYP. MAX. Unit VDET Detector Threshold 2.633 2.700 2.767 V VHYS Detector Threshold Hysteresis 0.081 0.135 0.189 V ISS3 Supply Current3 1.2 µA VINmax Maximum Input Voltage 10 V VOPTmin Minimum Operating Voltage 1.8 V IOUT Sensing pin Input Current VSEN Sensing pin Input Voltage tPLH Output Delay ∆Topt IDOUTleak VDS=0.5V, VOUT1=1.5V 1.0 2.0 mA VDS=0.5V, VOUT1=3.0V 4.0 5.
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RV5VH1××/RV5VH2×× • RV5VH102 DC/DC Converter 1 Symbol VOUT1=5.0V, Topt=25˚C Item VOUT1 Step-up Output Voltage VINmax Maximum Input Voltage Vstart Oscillator Start-up Voltage Vhold Hold-on Input Voltage ISS1 Supply Current1 *1 ILX LX Switching Current ILXleak fosc Maxdty η VLXlim DVOUT1 DTopt LX Leakage Current Conditions TYP. MAX. Unit 4.875 5.000 5.125 V 10 V 0.8 V No Load IOUT=1mA, VIN : 2→0V 0.7 1.2 No Load, CSW=“L” VLX=0.4V ON (VLX=“L”) µA 100 mA 0.
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RV5VH1××/RV5VH2×× DC/DC Converter 2 Symbol VOUT1=5.0V, Topt=25˚C Item VSET Set Output Voltage VFB Feed Back Voltage VIN Maximum Input Voltage VOPTmin Minimum Operating Voltage Conditions TYP. MAX. Unit *1 –3.000 0 V 0 IOUT=1mA mV 10 V 1.8 V ISS2 Supply Current2 CSW= “H” at No Load 25 µA Istandby Standby Current CSW=“L” 0.3 µA IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V 3 6 mA IEXT2L EXT2 “L” Output Current VEXT2=0.
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RV5VH1××/RV5VH2×× Voltage Detector Symbol VOUT1=5.0V, Topt=25˚C Item Conditions MIN. TYP. MAX. Unit VDET Detector Threshold 4.388 4.500 4.612 V VHYS Detector Threshold Hysteresis 0.135 0.225 0.315 V ISS3 Supply Current3*1 1.8 µA VINmax Maximum Input Voltage 10 V VOPTmin Minimum Operating Voltage*2 1.8 V IOUT ISEN Sensing Pin Input Current tPLH Output Delay ∆VOUT1 ∆Topt IDOUTleak VDS=0.5V, VOUT1=1.5V 1.0 2.0 mA VDS=0.5V, VOUT1=5.0V 7.0 10.
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RV5VH1××/RV5VH2×× • RV5VH201 DC/DC Converter 1 Symbol VOUT1=3.0V, Topt=25˚C Item VOUT1 Step-up Output Voltage VINmax Maximum Input Voltage Vstart Oscillator Start-up Voltage Vhold Hold-on Input Voltage ISS1 Supply Current1 *1 Conditions MIN. TYP. MAX. Unit IOUT=0mA 2.925 3.000 3.075 V 10 V 0.8 V No Load IOUT=1mA 0.7 0.7 IOUT=0mA, CSW=“L” V 80 µA IEXT1H EXT1 “H” Output Current VEXT2=VOUT1–0.4V 1.5 3 mA IEXT1L EXT1 “L” Output Current VEXT2=0.
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RV5VH1××/RV5VH2×× DC/DC Converter 2 Symbol VOUT1=3.0V, Topt=25˚C Item VSET Output Voltage Setting Range VFB Feed Back Voltage VIN Maximum Input Voltage VOPTmin ISS2 Istandby Minimum Operating Voltage*2 Supply Current2*3 Standby Current Conditions MIN. TYP. *1 –20 0 IOUT=1mA MAX. Unit 0 V 20 mV 10 V 1.8 V CSW= “H” IOUT=0mA 10 µA CSW=“L” 0.3 µA IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V 2 4 mA IEXT2L EXT2 “L” Output Current VEXT2=0.
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RV5VH1××/RV5VH2×× Voltage Detector Symbol VOUT1=3.0V, Topt=25˚C Item MIN. TYP. MAX. Unit VDET Detector Threshold 2.633 2.700 2.767 V VHYS Detector Threshold Hysteresis 0.081 0.135 0.189 V ISS3 Supply Current3*1 1.2 µA VINmax Maximum Input Voltage 10 V VOPTmin Minimum Operating Voltage*2 1.8 V IOUT Sensing Pin Input Current tPLH Output Delay ∆Topt IDOUTleak VDS=0.5V, VOUT1=1.5V 1.0 2.0 mA VDS=0.5V, VOUT1=3.0V 4.0 5.
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RV5VH1××/RV5VH2×× • RV5VH202 DC/DC Converter 1 Symbol VOUT1=5.0V, Topt=25˚C Item VOUT1 Step-up Output Voltage VINmax Maximum Input Voltage Vstart Oscillator Start-up Voltage Vhold Hold-on Input Voltage ISS1 Supply Current1 *1 Conditions MIN. TYP. MAX. Unit IOUT=0mA 4.875 5.000 5.125 V 10 V 0.8 V No Load IOUT=1mA 0.7 0.7 IOUT=0mA, CSW=“L” V 40 µA IEXT1H EXT1 “H” Output Current VEXT2=VOUT1–0.4V 2 4 mA IEXT1L EXT1 “L” Output Current VEXT2=0.
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RV5VH1××/RV5VH2×× DC/DC Converter 2 Symbol VOUT1=5.0V, Topt=25˚C Item VSET Output Voltage Setting Range VFB Feed Back Voltage VIN Maximum Input Voltage VOPTmin ISS2 Istandby Minimum Operating Voltage*2 Supply Current2*3 Standby Current Conditions TYP. *1 MAX. Unit 0 V 0 IOUT=1mA mV 10 V 1.8 V CSW= “H”, No Load 25 µA CSW=“L” 0.3 µA IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V 3 6 mA IEXT2L EXT2 “L” Output Current VEXT2=0.
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RV5VH1××/RV5VH2×× Voltage Detector Symbol VOUT1=5.0V, Topt=25˚C Item Conditions MIN. TYP. MAX. Unit VDET Detector Threshold 4.388 4.500 4.612 V VHYS Detector Threshold Hysteresis 0.135 0.225 0.315 V ISS3 Supply Current3*1 1.8 µA VINmax Maximum Input Voltage 10 V VOPTmin Minimum Operating Voltage*2 1.8 V IOUT ISEN Sensing Pin Input Current tPLH Output Delay ∆VOUT1 ∆Topt IDOUTleak VDS=0.5V, VOUT1=1.5V 1.0 2.0 mA VDS=0.5V, VOUT1=5.0V 7.0 10.
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RV5VH1××/RV5VH2×× OPERATION • DC/DC Converter 1 RV5VH1×× Vref OSC p_shift + – Error Amp.1 3 VOUT1 VOUT1 R SBD VLX lim. 4 C L LX1 VFM1 VIN RV5VH2×× Vref VOUT1 OSC + – Error Amp.1 p_shift 3 R 4 VFM1 VOUT1 SBD C L1 EXT1 Rb NPN Tr. Cb VIN 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.
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RV5VH1××/RV5VH2×× • DC/DC Converter 2 RV5VH1××/RV5VH2×× VOUT1 CSW 1 R1 FB – OSC + Error Amp.2 7 C2 PMOS SBD EXT2 VFM2 R2 VOUT2 6 L + C1 The DC/DC2 can operate by a voltage of “VOUT1”. A change in the VOUT2 will feed back to the internal error amplifier through external voltage setting resistors. The reference voltage should be provided from externally fixed power supply such as VOUT1.
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RV5VH1××/RV5VH2×× • Voltage Detector RV5VH1××/RV5VH2×× 2 VSEN Ra Output Tr. + – Vref Rb 8 Pull-up DOUT Tr.1 Rc The VD can operate by the voltage of “VOUT1”. The detector threshold and the reset voltage are internally adjusted by trimmed resistors and the VD monitors VSEN pin voltage. The DOUT is Nch-opendrain output and a pull up resistor is necessary.
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RV5VH1××/RV5VH2×× 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.
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RV5VH1××/RV5VH2×× SELECTION OF PERIPHERAL COMPONENTS When LxTr is on, the energy PON charged in the inductor is provided by Equation 2 as follows : PON=∫ 0ton (VIN · IL (t)) dt=∫ 0ton (VIN2 · t/L) dt =VIN2 · ton2/(2 · L)....................................................................................................Equation 2 In the case of the step-up DC/DC converter, the energy is also supplied from the input power source at the time of OFF.
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RV5VH1××/RV5VH2×× TYPICAL APPLICATION • RV5VH1×× R3 CSW DOUT VSEN FB R1 PMOS Output DC/DC1 VOUT1 R2 EXT2 D2 D1 LX1 GND Output DC/DC2 L1 L2 C1 CoiIs Diodes Capacitors Tr Resistors C3 C2 L1 : 100µH, L2 : 220µH Schottky type C1, C2 : 22µF(tantalum type), C3 : 0.01µF(ceramic type) PMOS : 2SJ238 R1, R2 : several hundreds kΩ, R3 : 100kΩ • RV5VH2×× R3 CSW DOUT VSEN FB PMOS Output DC/DC1 L1 VOUT1 EXT2 EXT1 GND R2 C3 SBD SBD C4 C1 R1 Output DC/DC2 L2 NPN Tr.
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RV5VH1××/RV5VH2×× TEST CIRCUITS 22µF V CSW DOUT VSEN FB VOUT1 EXT2 LX1 GND L1 A L1=100µH,220µH Fig.1 Test Circuit 1 100kΩ 5Ω (150Ω) * CSW DOUT VSEN FB VOUT1 EXT2 LX1(EXT1) GND A 150Ω V V * EXT1 Oscilloscope Fig.2 Test Circuit 2 CSW DOUT VSEN FB VOUT1 EXT2 LX1 GND A 0.5V Fig.
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RV5VH1××/RV5VH2×× 100kΩ CSW DOUT VSEN FB VOUT1 EXT2 LX1 GND Oscilloscope Pulse Input Fig.4 Test Circuit 4 2200pF 96µF V A CSW DOUT VSEN FB VOUT1 EXT2 EXT1 GND 27µH 300Ω Fig.
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RV5VH1××/RV5VH2×× TYPICAL CHARACTERISTICS • DC/DC Converter 1 1) Output Voltage vs. Output Current (RV5VH1××) Topt=25˚C L1=100µH C1=22µF Output Voltage VOUT1(V) 3.6 3.4 3.2 3.0 2.8 VIN=0.9V 2.6 VIN=1.2V VIN=1.5V VIN=2.0V 2.4 2.2 3.6 2.0 3.4 3.2 3.0 VIN=1.2V 2.8 VIN=2.0V 2.6 VIN=0.9V 2.4 VIN=1.5V 2.2 2.0 0 20 40 60 80 100 120 140 0 20 Output Current IOUT(mA) 6.0 Topt=25˚C L1=100µH C1=22µF 5.5 5.0 VIN=4.0V VIN=1.5V 4.5 VIN=2.0V 4.0 VIN=0.9V 3.
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RV5VH1××/RV5VH2×× 3) Efficiency vs. Output Current (RV5VH1××) Topt=25˚C L1=100µH C1=22µF RV5VH101 100 95 95 90 90 85 80 VIN=2.0V VIN=1.2V 75 70 65 60 55 Efficiency η(%) Efficiency η(%) 100 VIN=1.5V VIN=2.0V 85 80 75 70 65 55 VIN=1.5V 0.1 1 10 50 0.01 100 Output Current IOUT(mA) 100 0.1 1 10 100 Topt=25˚C L1=220µH C1=22µF RV5VH102 100 95 95 90 VIN=4.0V 85 VIN=1.5V 75 VIN=3.0V VIN=0.9V 70 65 Efficiency η(%) 90 Efficiency η(%) VIN=1.
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RV5VH1××/RV5VH2×× 5) DC/DC1 Output Voltage vs. Temperature RV5VH1××/2×× 3.2 3.1 3.0 2.9 IOUT=10mA IOUT=5mA IOUT=0A 2.8 2.7 –60 –40 –20 RV5VH1××/2×× 5.3 Output Voltage VOUT(V) Output Voltage VOUT(V) 3.3 VIN=1.2V L1=100µH C1=22µF 0 20 40 60 80 5.2 5.1 IOUT=1mA IOUT=10mA 5.0 4.9 4.8 IOUT=0A 4.7 –60 –40 –20 100 VIN=3V L1=100µH C1=22µF Temperature Topt(˚C) 0 20 40 60 80 100 Temperature Topt(˚C) 6) Oscillator Frequency vs.
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RV5VH1××/RV5VH2×× 8) On Resistance of LX vs. Supply Voltage RV5VH1×× 5.0 85˚C On Resistance Ron (Ω) 4.5 4.0 25˚C 3.5 3.0 –40˚C 2.5 2.0 1.5 1.0 0.5 0.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Supply Voltage VOUT1(V) 9) EXT1 Output Current vs.
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RV5VH1××/RV5VH2×× • DC/DC Converter 2 12) Output Voltage vs. Output Current Topt=25˚C VIN=1.2V VOUT1=3V RV5VH101 Output Voltage VOUT(V) 0 VSET –3V –2 –4 VSET –6V –6 –8 VSET –9V –10 VSET –12V –12 –14 0 2 4 6 8 10 12 14 Output Current IOUT(mA) 13) DC/DC2 Feed Back Voltage vs. Temperature RV5VH1××/2×× Feed Back Voltage VFB(V) 0.010 0.008 0.006 0.004 0.002 0.000 –0.002 –0.004 –0.006 –0.008 –0.010 –60 –40 –20 0 20 40 60 80 100 Temperature Topt(˚C) 14) EXT2 Output Current vs.
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RV5VH1××/RV5VH2×× 15) EXT2 Oscillator Frequency vs. Temperature RV5VH1××/2×× RV5VH1××/2×× VOUT1=3V 150 Oscillator Frequency fosc(kHZ) Oscillator Frequency fosc(kHZ) 150 145 140 135 130 125 120 115 110 105 100 –60 –40 –20 0 20 40 60 80 145 140 135 130 125 120 115 110 105 100 –60 –40 –20 100 VOUT1=5V Temperature Topt(˚C) 0 20 40 60 80 100 Temperature Topt(˚C) 16) EXT2 Oscillator Duty Cycle vs.
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RV5VH1××/RV5VH2×× • Voltage Detector 18) Detector Threshold Voltage vs. Temperature 19) VOUT1 Output Voltage vs. Output Current RV5VH1××/2×× 5.0 4.5 2.9 Output Current VOUT(V) Detector Threshold Voltage VDET(V) RV5VH1××/2×× 3.0 +VDET 2.8 –VDET 2.7 2.6 4.0 3.5 3.0 2.5 2.0 25˚C 1.5 85˚C 1.0 –40˚C 0.5 2.5 –60 –40 –20 0.0 0 20 40 60 80 100 0 Temperature Topt(˚C) 1 2 20) DOUT Output Current vs.
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DC/DC CONVERTER CONTROLLER (BOOST / INVERTING OUTPUT FOR LCD) RV5VH3×× BLOCK DIAGRAM – CSW 1 8 DOUT + FB1 2 Vref Error Amp.2 – VDD 3 7 FB2 – + 6 EXT2 VFM2 + Error Amp.1 EXT1 4 VFM1 p_shift 5 GND OSC PIN CONFIGURATION • 8 pin SSOP (0.
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RV5VH3×× PIN DESCRIPTION Pin No. Symbol Description 1 CSW Control Switch for DC/DC1, 2 2 FB1 Input for DC/DC1 Error Amplifier 3 VDD Power Supply for Device Itself. Sensing Pin for Reset.
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RV5VH3×× ELECTRICAL CHARACTERISTICS • RV5VH301 DC/DC Converter 1 Symbol VDD=3.0V, Topt=25˚C Item Conditions MIN. VSET1 Output Voltage Setting 1 2.05 VFB1 Feed Back Volatage 1 1.950 VINmax Maximum Input Voltage VOPTmin Minimum Operating Voltage TYP. 2.000 Specified as a VDD Voltage for Device Operation ISS11 Supply Current11*2 CSW=“H”, FB1=1.9V 15 ISS12 Supply Current12*2 CSW=“H”, FB1=2.1V 4 Istandby Standby Current*3 CSW=“L” 4 MAX. Unit *1 V 2.050 V 10 V 1.
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RV5VH3×× DC/DC Converter 2 Symbol VDD=3.0V, Topt=25˚C Item VSET2 Output Voltage Setting 1 VFB2 Feed Back Volatage 1 VINmax Maximum Input Voltage VOPTmin Minimum Operating Voltage Conditions TYP. *1 –20 0 Specified as the VDD Voltage for Device Operation MAX. Unit 0 V 20 mV 10 V 1.8 V 60 µA ISS21 Supply Current21*2 CSW=“H”, FB2=0.1V 15 ISS22 Supply Current22*2 CSW=“H”, FB2=–0.1V 4 µA IEXT2H EXT2 “H” Output Current VEXT2=VDD–0.
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RV5VH3×× Voltage Detector Symbol VDD=3.0V, Topt=25˚C Item Conditions MIN. TYP. MAX. Unit VDET Detector Threshold 2.633 2.700 2.767 V VHYS Detector Threshold Hysteresis 0.081 0.135 0.189 V ISS3 Supply Current3*1 VINmax Maximum Input Voltage VOPTmin Minimum Operating Voltage IOUT tPLH ∆VOUT1 ∆Topt IDOUTleak 1.2 Specified as the VDD Voltage for Device Operation µA 10 V 1.8 V VDS=0.5V, VDD=1.5V 1.0 2.0 mA VDS=0.5V, VDD=3.0V 4.0 5.
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RV5VH3×× OPERATION • DC/DC Converter 1 RV5VH3×× VDD 3 CSW 1 Vref + OSC VOUT1 FB1 R1 2 SBD R2 – L1 Error Amp.1 p_shift EXT1 4 C Rb NPN Tr. VFM1 Cb VIN The DC/DC1 can operate by an input voltage to the VDD pin. A change in the VOUT1 will feed back to the internal error 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.
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RV5VH3×× • DC/DC Converter 2 RV5VH3×× VDD CSW VREF 1 R1 FB2 – OSC + Error Amp.2 7 C2 PMOS SBD EXT2 VFM2 R2 VOUT2 6 L + C1 The DC/DC2 can operate by an input voltage to the VDD pin. A change in the VOUT2 will feed back to the internal error amplifier through external voltage setting resistors. The VREF voltage should be provided from externally fixed power supply such as VOUT1. When the feed back voltage to the Error Amp.
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RV5VH3×× • Voltage Detector RV5VH3×× Pull-up 3 VDD R1 Output Tr. Vref R2 + – 8 DOUT Tr.1 R3 The Voltage Detector can operate by an input voltage to the VDD pin. The detector threshold and the reset voltage are internally adjusted by trimmed resistors and the VD monitors VDD pin voltage. The DOUT is Nch-opendrain output and a pull up resistor is necessary.
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RV5VH3×× TYPICAL APPLICATION 1 Output DC/DC 1 R5 R3 C5 CSW DOUT FB1 FB2 R1 R6 SBD L1 PMOS VDD EXT2 EXT1 GND SBD R4 NPN Tr. C3 R2 Output DC/DC 2 C1 C4 CoiI Diode capacitor PMOS NMOS Resistor L2 C2 L1 : 100µH, L2 : 100µH Schottky type C1 : 22µF(Ta), C2 : 22µF(Ta) C3 : 0.01µF (ceramic) C4 : 0.01µF (ceramic) C5 : 0.
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RV5VH3×× TYPICAL APPLICATION 2 VIN Output DC/DC 1 R5 R3 C5 CSW DOUT FB1 FB2 VDD EXT2 EXT1 GND R1 R6 SBD L1 PMOS SBD R4 NPN Tr. C3 R2 Output DC/DC 2 C1 C4 CoiI Diode capacitor PMOS NPN Tr. Resistor L2 C2 L1 : 100µH, L2 : 100µH Schottky type C1 : 22µF(Ta), C2 : 22µF(Ta) C3 : 0.01µF (ceramic) C4 : 0.01µF (ceramic) C5 : 0.
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RV5VH3×× TYPICAL APPLICATION 3 VIN Output DC/DC 1 R3 R5 C5 PMOS L1 R6 CSW DOUT FB1 FB2 R1 PNP Tr. R4 SBD1 VDD EXT2 EXT1 GND SBD3 R2 C3 SBD2 C4 Output DC/DC 2 NMOS C1 L2 C2 R1 : 820kΩ, R2 : 820kΩ, R3 : 100kΩ, R4 : 1kΩ, R5 : 750kΩ (AdjustabIe) R6 : 100kΩ L1 : 68µH, L2 : 27µH C1 : 22µF, C2 : 22µF, C3 : 1000pF, C4 : 2200pF, C5 : 1000pF PMOS : 2SJ238, NMOS : 2SK1470, PNPTr.
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RV5VH3×× TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current 2) Efficiency vs. Output Current VIN=3.6V 25 20 90 15 Efficiency η(%) Output Voltage VOUT(V) VIN=3.6V 100 10 5 0 –5 –10 ±15V 70 60 50 ±20V 40 –15 30 –20 20 0.0001 –25 0 10 20 3) CSW Load Transient Responce 1 VOUT1 10 CSW 5 0 –5 –10 –15 VOUT2 –20 –50 0 0.1 VIN=3.6V, IOUT=1mA 20 Output Voltage VOUT(V) Output Voltage VOUT(V) 15 0.01 4) CSW Load Transient Responce 2 VIN=3.6V, IOUT=1mA 20 0.
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RV5VH3×× 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 a b c ↑ Code Contents DC/DC1 type a 1 : Internal LX Driver Transister Type 2 : External EXT Driver Transister Type 3 : Variable Output Voltage Type b c Serial (01, 02, 03) Number of Setting DC/DC1 Output Voltage and Setting VD Detect Voltage.
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RV5VH3×× PACKAGE DIMENSIONS (Unit : mm) 6.4±0.3 4.4±0.2 • 8 pin SSOP (0.65mm pitch) +0.1 0.15 –0.05 0.1±0.1 3.1±0.3 1.15±0.1 0.575 TYP. 0.65 0.22±0.1 0.5±0.3 0.15 M 0.15 TAPING SPECIFICATION (Unit : mm) 3.7 2.0±0.05 6.9 8.0±0.1 2.7MAX. E1 E2 User Direction of Feed 46 12.0±0.3 4.0±0.1 5.5±0.05 +0.1 ø1.5 –0 0.3±0.1 1.75±0.1 • 8 pin SSOP (0.
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RV5VH3×× APPLICATION HINTS 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. • Make sufficient grounding. A large current flows through GND Pin byswitching.
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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.