RV5VH102-E1

RV5VH RICOH | Alldatasheet

Document overview

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Technical content

NO. EA-049-0006

DC/DC CONVERTER CONTROLLER RV5VH SERIES OUTLINE Each of the RV5VH series is dual output CMOS DC/DC converter ICs integrating Step-up and inverting DC/DC convert- ers. The RV5VH3×× series ICs consists 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 package for the RV5VH series is 8pin SSOP(0.65mm pitch), and it is suitable for power supply systems with positive and negative output, such as pager, PDA, which need power supplies for LCD. RV5VH1×× and RV5VH2×× series are able to provide two DC/DC converters, one is a step-up DC/DC converter with internally fixed output and the other is an inverting DC/DC converter with adjustable output by external resistors. A volt- age detector with sensing pin is also included. RV5VH3×× series are able to provide two DC/DC converters, both of them require external drivers, DC/DC1, and inverting one, DC/DC2, can be adjustable by resistors.

FEATURES

DC/DC2 : inverting(negative voltage)

• Low voltage operation available
• Low Supply Current
• Sleep Mode coefficient of output voltage

APPLICATIONS

• Power source for telecommunication systems
• Power source for portable data processing systems, e.g. PDA, Electronic Data Banks
• Power source for Audio-Visual systems, e.g. CD players, Video cameras
• Power source for Notebook PCs, Word processing systems
• Gadgets which need two power supplies, e.g. CPU and LCD

Error Amp.1 Error Amp.2 VFM2 VLX lim. VFM1 OSC p_shift DC/DC CONVERTER CONTROLLER (BOOST / INVERTING) RV5VH1××/RV5VH2××

• RV5VH1×× CSW VSEN VOUT1 EXT1 DOUT FB EXT2 GND Vref Error Amp.1 Error Amp.2 VFM2 VFM1 OSC p_shift
• RV5VH2××

RV5VH1××/RV5VH2×× PIN CONFIGURATION

• 8 pin SSOP (0.65mm pitch) PIN DESCRIPTION
• RV5VH1×× Pin No. Symbol

Description

Sensing Pin for Voltage Detector VOUT1 Output for DC/DC1, Power supply for the device LX1 Output for DC/DC1, switching (Nch Open-Drain) GND Ground EXT2 External Transistor drive pin for DC/DC2 (CMOS output) FB Input for DC/DC2 Error Amplifier DOUT Output for Voltage detector

• RV5VH2×× Pin No. Symbol

Sensing Pin for Voltage Detector VOUT1 Output for DC/DC1, Power supply for the device EXT1 External Transistor drive pin for DC/DC1 (CMOS output) GND Ground EXT2 External Transistor drive pin for DC/DC2 (CMOS output) FB Input for DC/DC2 Error Amplifier DOUT Output for Voltage Detector

RV5VH1××/RV5VH2×× ABSOLUTE MAXIMUM RATINGS

• RV5VH1×× Symbol Item Ratings Unit VOUT1 VOUT1 Pin Voltage V VLX1 LX1 Pin Voltage V VSEN VSEN Pin Voltage V DOUT DOUT Pin Voltage 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 +0.3 V ILX1 LX1 Output Current 400 mA IEXT2 EXT2 Output Current ±50 mA PD Power Dissipation 300 mW Topt Operating Temperature –40 to +85 Tstg Storage Temperature –55 to +125 Tsolder Lead Temperature (Soldering) 260˚C 10sec

RV5VH1××/RV5VH2×× 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.

• RV5VH2×× Symbol Item Ratings Unit VOUT1 VOUT1 Pin Voltage V VSEN VSEN Pin Voltage V DOUT DOUT Pin Voltage V VCSW CSW Pin Voltage –0.3 to VOUT1 +0.3 V VEXT1, 2 EXT1, 2 Pin Voltage –0.3 to VOUT1 +0.3 V VFB FB Pin Voltage –0.3 to VOUT1 +0.3 V IEXT1, 2 EXT1, 2 Output Current ±50 mA PD Power Dissipation 300 mW Topt Operating Temperature –40 to +85 Tstg Storage Temperature –55 to +125 Tsolder Lead Temperature (Soldering) 260˚C 10sec

RV5VH1××/RV5VH2××

ELECTRICAL CHARACTERISTICS

• RV5VH101 DC/DC Converter 1 * ) VIN=1.2V, IOUT=10mA, Topt=25˚C, unless otherwise specified. (See Typical Application) *1 ) This value only shows the supply current of DC/DC1, not include the supply current of Voltage Detector and external resistors. Symbol Item Conditions MIN. TYP. MAX. Unit VOUT1 Step-up Output Voltage 2.925 3.000 3.075 V VINmax Maximum Input Voltage V Vstart Oscillator Start-up Voltage No Load 0.7 0.8 V Vhold Hold-on Input Voltage IOUT=1mA, VIN : 2→0V 0.7 V ISS1 Supply Current1 *1 No Load, CSW=“L” µA ILX LX Switching Current VLX=0.4V 100 mA ILXleak LX Leakage Current VLX=6.0V, VIN=3.5V 0.03 µA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle ON (VLX=“L”) η Efficiency VLXlim Voltage Limit for LX Switch for LX pin 0.4 0.8 V ∆VOUT1 Output Voltage Temp. Coefficient ±100 ppm/˚C ∆Topt VOUT1=3.0V, Topt=25˚C

RV5VH1××/RV5VH2×× DC/DC Converter 2 Symbol Item Conditions MIN. TYP. MAX. Unit VSET Set Output Voltage V VFB Feed Back Voltage –20 mV VIN Maximum Input Voltage V VOPTmin Minimum Operating Voltage IOUT=1mA 1.8 V ISS2 Supply Current2 CSW= “H” at No Load µA Istandby Standby Current CSW=“L” 0.3 µA IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V mA IEXT2L EXT2 “L” Output Current VEXT2=0.4V mA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle VEXT2=“H” VCSWH CSW “H” Input Voltage VOUT1=3.0V 1.6 VOUT1 V VCSWL CSW “L” Input Voltage VOUT1=3.0V 0.4 V ICSWleak CSW Input Leakage Current VOUT1=3.0V –0.5 0.5 µA ∆VFB Feed Back Voltage Temp.Coefficient ±30 µV/˚C ∆Topt * ) VOUT1=3.0V, IOUT=1mA, Topt=25˚C, unless otherwise specified. (See Typical Application) *1 ) Adjustable by external resistors to -30V. VOUT1=3.0V, Topt=25˚C

RV5VH1××/RV5VH2×× Symbol 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 1.2 µA VINmax Maximum Input Voltage V VOPTmin Minimum Operating Voltage 1.8 V IOUT Output Current VDS=0.5V, VOUT1=1.5V 1.0 2.0 mA VDS=0.5V, VOUT1=3.0V 4.0 5.0 mA ISEN Sensing pin Input Current VSEN=3.0V 0.3 1.2 µA VSEN Sensing pin Input Voltage 0.7 V tPLH Output Delay 100 µs ∆VOUT1 DetectorThresholdTemp.Coefficient ±100 ppm/˚C ∆Topt IDOUTleak DOUT Leakage Current 0.03 0.5 µA VOUT1=3.0V, Topt=25˚C Voltage Detector * ) VOUT1=3.0V, Topt=25˚C, unless otherwise specified. (See Typical Application)

RV5VH1××/RV5VH2××

• RV5VH102 DC/DC Converter 1 * ) VIN=1.2V, IOUT=10mA, Topt=25˚C, unless otherwise specified. (See Typical Application) *1 ) This value only shows the supply current of DC/DC1, not include the supply current of Voltage Detector and external resistors. VOUT1=5.0V, Topt=25˚C Symbol Item Conditions MIN. TYP. MAX. Unit VOUT1 Step-up Output Voltage 4.875 5.000 5.125 V VINmax Maximum Input Voltage V Vstart Oscillator Start-up Voltage No Load 0.7 0.8 V Vhold Hold-on Input Voltage IOUT=1mA, VIN : 2→0V 1.2 V ISS1 Supply Current1 *1 No Load, CSW=“L” µA ILX LX Switching Current VLX=0.4V 100 mA ILXleak LX Leakage Current VLX=6.0V, VIN=5.5V 0.03 µA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle ON (VLX=“L”) η Efficiency VLXlim Voltage Limit for LX Switch 0.4 0.8 V ∆VOUT1 Output Voltage Temp. Coefficient ±100 ppm/˚C ∆Topt

RV5VH1××/RV5VH2×× DC/DC Converter 2 VOUT1=5.0V, Topt=25˚C Symbol Item Conditions MIN. TYP. MAX. Unit VSET Set Output Voltage –3.000 V VFB Feed Back Voltage mV VIN Maximum Input Voltage V VOPTmin Minimum Operating Voltage IOUT=1mA 1.8 V ISS2 Supply Current2 CSW= “H” at No Load µA Istandby Standby Current CSW=“L” 0.3 µA IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V mA IEXT2L EXT2 “L” Output Current VEXT2=0.4V mA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle VEXT2=“H” VCSWH CSW “H” Input Voltage VOUT1=5.0V 1.6 VOUT1 V VCSWL CSW “L” Input Voltage VOUT1=5.0V 0.4 V ICSWleak CSW Input Leakage Current VOUT1=5.0V –0.5 0.5 µA ∆VFB Feed Back Voltage Temp.Coefficient ±30 µV/˚C ∆Topt * ) VOUT1=3.0V, IOUT=1mA, Topt=25˚C, unless otherwise specified. (See Typical Application) *1 ) Adjustable by external resistors to -30V.

RV5VH1××/RV5VH2×× Voltage Detector VOUT1=5.0V, Topt=25˚C Symbol 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 V VOPTmin Minimum Operating Voltage*2 1.8 V IOUT Output Current VDS=0.5V, VOUT1=1.5V 1.0 2.0 mA VDS=0.5V, VOUT1=5.0V 7.0 10.0 mA ISEN Sensing Pin Input Current VSEN=5.0V 0.7 2.0 µA tPLH Output Delay 100 µs ∆VOUT1 DetectorThresholdTemp.Coefficient ±100 ppm/˚C ∆Topt IDOUTleak DOUT Leakage Current 0.03 0.5 µA * ) VOUT1=3.0V, Topt=25˚C, unless otherwise specified. (See Typical Application)

RV5VH1××/RV5VH2×× Symbol Item Conditions MIN. TYP. MAX. Unit VOUT1 Step-up Output Voltage IOUT=0mA 2.925 3.000 3.075 V VINmax Maximum Input Voltage V Vstart Oscillator Start-up Voltage No Load 0.7 0.8 V Vhold Hold-on Input Voltage IOUT=1mA 0.7 V ISS1 Supply Current1 *1 IOUT=0mA, CSW=“L” µA IEXT1H EXT1 “H” Output Current VEXT2=VOUT1–0.4V 1.5 mA IEXT1L EXT1 “L” Output Current VEXT2=0.4V mA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle ON (VLX=“L”) ∆VOUT1 Output Voltage Temp. Coefficient ±100 ppm/˚C ∆Topt

• RV5VH201 DC/DC Converter 1 VOUT1=3.0V, Topt=25˚C * ) VIN=1.2V, IOUT=10mA, unless otherwise specified. (See Typical Application) *1 ) This value shows only the supply current of DC/DC1, not include the supply current of Voltage Detector and external resistors.

RV5VH1××/RV5VH2×× Symbol Item Conditions MIN. TYP. MAX. Unit VSET Output Voltage Setting Range V VFB Feed Back Voltage –20 mV VIN Maximum Input Voltage V VOPTmin Minimum Operating Voltage*2 IOUT=1mA 1.8 V ISS2 Supply Current2*3 CSW= “H” IOUT=0mA µA Istandby Standby Current CSW=“L” 0.3 µA IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V mA IEXT2L EXT2 “L” Output Current VEXT2=0.4V mA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle VEXT2=“H” VCSWH CSW “H” Input Voltage VOUT1=3.0V 1.6 VOUT1 V VCSWL CSW “L” Input Voltage VOUT1=3.0V 0.4 V ICSWleak CSW Input Leakage Current CSW=3.0V –0.5 0.5 µA ∆VFB Feed Back Voltage Temp. Coefficient ±30 µV/˚C ∆Topt DC/DC Converter 2 * ) VOUT1=3.0V, VOUT2=-0.3V, IOUT2=1mA, unless otherwise specified. (See Typical Application) *1 ) Adjustable by external resistors to -30V. *2 ) “Minimum Operating Voltage”means a voltage for the “VOUT1” pin. *3 ) This value shows only the supply current of DC/DC2, not include the supply current of external resistors. VOUT1=3.0V, Topt=25˚C

RV5VH1××/RV5VH2×× Voltage Detector VOUT1=3.0V, Topt=25˚C Symbol 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 1.2 µA VINmax Maximum Input Voltage V VOPTmin Minimum Operating Voltage*2 1.8 V IOUT Output Current VDS=0.5V, VOUT1=1.5V 1.0 2.0 mA VDS=0.5V, VOUT1=3.0V 4.0 5.0 mA ISEN Sensing Pin Input Current VSEN=3.0V 0.3 1.2 µA tPLH Output Delay 100 µs ∆VOUT1 DetectorThresholdTemp.Coefficient ±100 ppm/˚C ∆Topt IDOUTleak DOUT Leakage Current 0.03 0.5 µA * ) VOUT1=3.0V : unless otherwise specified. (See Typical Application) *1 ) This value only shows the supply current of voltage detector. *2 ) “Minimum Operating Voltage”means a voltage for the “VOUT1” pin.

RV5VH1××/RV5VH2××

• RV5VH202 DC/DC Converter 1 VOUT1=5.0V, Topt=25˚C * ) VIN=3.0V, IOUT=10mA : unless otherwise specified. (See Typical Application) *1 ) This value only shows the supply current of DC/DC1, does not include the supply current of Voltage Detector and external resistors. Symbol Item Conditions MIN. TYP. MAX. Unit VOUT1 Step-up Output Voltage IOUT=0mA 4.875 5.000 5.125 V VINmax Maximum Input Voltage V Vstart Oscillator Start-up Voltage No Load 0.7 0.8 V Vhold Hold-on Input Voltage IOUT=1mA 0.7 V ISS1 Supply Current1 *1 IOUT=0mA, CSW=“L” µA IEXT1H EXT1 “H” Output Current VEXT2=VOUT1–0.4V mA IEXT1L EXT1 “L” Output Current VEXT2=0.4V mA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle ON (VLX=“L”) η Efficiency ∆VOUT1 Output Voltage Temp. Coefficient ±100 ppm/˚C ∆Topt

RV5VH1××/RV5VH2×× DC/DC Converter 2 * ) VOUT1=5.0V, VOUT2=–3.0V, IOUT2=1mA : unless otherwise specified. (See Typical Application) *1 ) Adjustable by external resistors to -30V. *2 ) “Minimum Operating Voltage”means a voltage for the “VOUT1” pin. *3 ) This value shows only the supply current of DC/DC2, not include the supply current of external resistors. Symbol Item Conditions MIN. TYP. MAX. Unit VSET Output Voltage Setting Range V VFB Feed Back Voltage mV VIN Maximum Input Voltage V VOPTmin Minimum Operating Voltage*2 IOUT=1mA 1.8 V ISS2 Supply Current2*3 CSW= “H”, No Load µA Istandby Standby Current CSW=“L” 0.3 µA IEXT2H EXT2 “H” Output Current VEXT2=VOUT1–0.4V mA IEXT2L EXT2 “L” Output Current VEXT2=0.4V mA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle VEXT2=“H” VCSWH CSW “H” Input Voltage VOUT1=5.0V 1.6 VOUT1 V VCSWL CSW “L” Input Voltage VOUT1=5.0V 0.4 V ICSWleak CSW Input Leakage Current CSW=5.0V –0.5 0.5 µA ∆VFB Feed Back Voltage Temp.Coefficient ±30 µV/˚C ∆Topt VOUT1=5.0V, Topt=25˚C

RV5VH1××/RV5VH2×× Voltage Detector VOUT1=5.0V, Topt=25˚C * ) VOUT1=5.0V : unless otherwise specified. (See Typical Application) *1 ) This value only shows the supply current of voltage detector. *2 ) “Minimum Operating Voltage”means a voltage for the “VOUT1” pin. Symbol 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 V VOPTmin Minimum Operating Voltage*2 1.8 V IOUT Output Current VDS=0.5V, VOUT1=1.5V 1.0 2.0 mA VDS=0.5V, VOUT1=5.0V 7.0 10.0 mA ISEN Sensing Pin Input Current VSEN=5.0V 0.7 2.0 µA tPLH Output Delay 100 µs ∆VOUT1 DetectorThresholdTemp.Coefficient ±100 ppm/˚C ∆Topt IDOUTleak DOUT Leakage Current 0.03 0.5 µA

RV5VH1××/RV5VH2×× OPERATION

• DC/DC Converter 1 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 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 oscllation or otherwise will stop oscillation. The internal feed back resistor “R” which is fixed and adjusted by laser trim can make the feed back input voltage to “Error Amp.1” stable. Pulses from the “OSC” circuit have a duty cycle of 50% and it becomes 65 to 75%(at high side) through the “P_shift” circuit. The duty cycle may be smaller with light load spontaneously. These clook pulses control VFM circuit and make it possible to operate as a boost converter. The output of LX1 is Nch open drain, while the output of “EXT1” is driven by CMOS buffer and an external NMOS driver is also available instead of an NPN transistor, in such cases the Rb and the Cb are not necessary. A recommended Rb is 300Ω. When you use a MOS- FET for the EXT1, the input voltage should be high enough and you can get high effiiciency applications. A current limit is available only for the RV5VH1 series, to prevent an excess current from flowing through Nch driver tran- sistor. The DC/DC1 can be shut down by CSW pin. When the CSW pin is High, VDD level, the DC/DC1 is enabled and when the CSW pin is “L”, GND level, the DC/DC1 is disabled. The EXT1 pin outputs “L” while the DC/DC1 is disabled. C L SBD VOUT1 VOUT1 LX1 R VLX lim. OSC Vref p_shift VFM1 VIN RV5VH1×× Error Amp.1 C SBD VOUT1 VOUT1 EXT1 R OSC Vref p_shift VIN RV5VH2×× Error Amp.1 VFM1 NPN Tr. Cb Rb

RV5VH1××/RV5VH2×× L FB VOUT2 VOUT1 EXT2 RV5VH1××/RV5VH2×× Error Amp.2 VFM2 CSW SBD PMOS OSC 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. 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. Pulses from the “OSC” circuit have a duty cycle of 50% and it makes VFM operation allowable. There might be certain cases that the duty cycles becomes smaller temporarily at light load current. The output of “EXT2” is driven by CMOS buffer operated VOUT1 and GND. A PMOS driver will be connected to the “EXT2” pin and its switching operation generates negative output voltage through energy accumulated in an inductor. The DC/DC1 can be shut down by CSW pin. When the CSW pin is “H”, VDD level, the DC/DC1 is enabled and when the CSW pin is “L”, GND level, the DC/DC1 is disabled. The EXT2 pin outputs High while the DC/DC2 is disabled.

• Set output voltage DC/DC Converter2 VOUT2 is described as follows: VOUT1:R1=|–VOUT2| : R2 / The FB voltage is controlled to 0V and VOUT1 is provided externally |–VOUT2|=VOUT1 × R2/R1 thus, any output voltage of DC/DC2 can be set by changing R1 or/and R2. Certain temperature coefficient of VOUT2 can be set by using R1,R2 having such temperature characteristics.
• DC/DC Converter 2

RV5VH1××/RV5VH2×× VSEN DOUT RV5VH1××/RV5VH2×× Pull-up Output Tr. Vref Ra Rb Rc Tr.1 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 open-drain output and a pull up resistor is necessary. Oepration Diagram VSEN pin is pulled up to VOUT1 voltage

• Voltage Detector A B Reset Voltage Detector Threshold GND GND Output Voltage Hysteresis Range +VDET –VDET Step Step 1 Step 2 Step 3 Step 4 Step 5 Comparator(+) Pin Input Voltage A B B B A Comparator Output H L L L H Tr. 1 OFF ON ON ON OFF Output Tr OFF ON Indefinite ON OFF A : Rb+Rc × VSEN Ra+Rb+Rc B : Rb × VSEN Ra+Rb+Rc Step 1. Output Voltage is equal to Pull-up Voltage. Step 2. When Input voltage (VSEN) reaches the state of Vref≥VSEN×(Rb×Rc)/(Ra+Rb+Rc) at point A, the output of the comparator is reversed. so that the output voltage becomes to GND. Step 3. Output VoItage becomes indefinite when Power source Voltage (VSEN) is smaller than Minimum Operating VoItage. When the output is pulIed up, Output becomes pull-up voltage and GND. Step 4. Output VoItage becomes to GND. Step 5. When input voltage(VSEN) reaches the state of Vref≤VSEN×Rb/(Ra+Rb) at point B, the output of the comparator is reversed, so that the output voltage becomes to pull-up voltage.

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. The operation will be explained with reference to the following diagrams : < Current through L > < Basic Circuits > L SD IOUT VOUT CL Lx Tr VIN IL ILmin ILmax topen t ton toff T=1/fosc Step 1 : LxTr is turned ON and current IL (=i1 ) flows, so that energy is charged in L. At this moment, IL(=i1 ) is increased from ILmin (=0) to reach ILmax in protection to the on-time period (ton) of LxTr. Step 2 : When LxTr is turned OFF, Schottky diode (SD) is turned on in order that L maintains IL at ILmax, so that current IL (=i2) is released. Step 3 : IL (=i2) is gradually decreased, and IL reaches ILmin (=0) after a time period of topen, so that SD is turned OFF. In the case of VFM control system, the output voltage is maintained constant by controlling the oscillator fre- quency (fosc) with the on-time period (ton) being maintained constant. In the above two diagrams, the maximum value (ILmax) and the minimum value (ILmin) of the current which flows through the inductor are the same as those when LxTr is ON and also when LxTr is OFF. The difference between ILmax and ILmin, which is represented by ∆I, is: wherein T=1/fosc=ton+toff duty (%)=ton/T · 100=ton · fosc · 100 topen≤toff In Equation 1,VIN · ton/L and (VOUT–VIN) · topen/L are respectively the change in the current at ON, and the change in the current at OFF. In the VFM system, topen < toff as illustrated in the above diagram. In this case, the energy charged in the inductor during the time period of ton is discharged in its entirely during the time period of toff, so that ILmin becomes zero (ILmin=0).

RV5VH1××/RV5VH2×× The above explanation is directed to the calculation in an ideal case where it is supposed that there is no energy loss in the external components and LxSW. In an actual case, the maximum output current will be 50 to 80% of the above calculated maximum output current. In particular, care must be taken because VIN is decreased in an amount corresponding to the voltage reduction caused by LxSW when IL is large or VIN is small. Furthermore, It is required that with respect to VOUT, Vf of the diode (about 0.3V in the case of a Schottky type diode) be taken into consideration. When ILX and VLX exceed their respective ratings, use the RV5VH with the attachment of an external tran- sistor with a low saturation voltage thereto. HINTS When LxTr is on, the energy PON charged in the inductor is provided by Equation 2 as follows : PON=∫0 ton (VIN · IL (t)) dt=∫0 ton (VIN2 · t/L) dt 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. Thus, POFF =∫0 topen(VIN · IL (t)) dt=∫0 topen (VIN · (VOUT–VIN) · t/L)dt =VIN · (VOUT–VIN) · topen2/(2 · L) Here, topen=VIN · ton/(VOUT–VIN) from Equation 1, and when this is substituted into the above equation. Input power PIN is (PON+POFF)/T. When this is converted in its entirely to the output. Equation 5 can be obtained as follows by solving Equation 4 for IOUT by substituting Equation 2 and 3 into Equation 4 : IOUT=VIN2 · ton2/(2 · L · T · (VOUT–VIN) The peak current which flows through L · LxTr · SD is Therefore, it is necessary that the setting of the input/output conditions and the selection of peripheral compo- nents be made with ILmax taken into consideration. SELECTION OF PERIPHERAL COMPONENTS

RV5VH1××/RV5VH2×× <Components> Coils L1 : 27µH, L2 : 220µH Diodes Schottky type Capacitors C1 : 47µF(tantalum type), C2 : 22µF(tantalum type) C3 : 0.01µF(ceramic type) C4 : 0.01µF(ceramic type) PMOS 2SJ238(TOSHIBA), etc. NPN Tr. 2SD1628G(SANYO), etc. Resistors R1 : 100KΩ R2 : 0-500KΩ R3 : 100KΩ R4 : 300Ω TYPICAL APPLICATION

• RV5VH1×× CSW VSEN VOUT1 LX1 DOUT FB EXT2 GND PMOS Output DC/DC1 Output DC/DC2
• RV5VH2×× CSW VSEN VOUT1 EXT1 DOUT FB EXT2 GND SBD PMOS SBD NPN Tr. Output DC/DC1 Output DC/DC2 <Components> CoiIs L1 : 100µH, L2 : 220µH Diodes Schottky type Capacitors C1, C2 : 22µF(tantalum type), C3 : 0.01µF(ceramic type) Tr PMOS : 2SJ238 Resistors R1, R2 : several hundreds kΩ, R3 : 100kΩ

RV5VH1××/RV5VH2×× TEST CIRCUITS CSW DOUT FB EXT2 L1=100µH,220µH GND VSEN VOUT1 LX1 V 22µF A Fig.1 Test Circuit 1 CSW DOUT FB EXT2 GND VSEN VOUT1 LX1(EXT1) 100kΩ 150Ω A V V (150Ω) Oscilloscope * EXT1 Fig.2 Test Circuit 2 CSW DOUT FB EXT2 GND VSEN VOUT1 LX1 A 0.5V Fig.3 Test Circuit 3

RV5VH1××/RV5VH2×× 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) Typical Application : Typical Characteristics 12) CSW DOUT FB EXT2 GND VSEN VOUT1 LX1 100kΩ Pulse Input Oscilloscope Fig.4 Test Circuit 4 CSW DOUT FB EXT2 GND VSEN VOUT1 EXT1 V 96µF 27µH 2200pF 300Ω A Fig.5 Test Circuit 5

RV5VH1××/RV5VH2×× TYPICAL CHARACTERISTICS

• DC/DC Converter 1 1) Output Voltage vs. Output Current (RV5VH1××) RV5VH101 3.6 3.4 3.2 2.8 3.0 2.4 2.6 2.2 2.0 Output Current IOUT(mA) Output Voltage VOUT1(V) 100 140 120 VIN=0.9V VIN=1.2V VIN=1.5V VIN=2.0V Topt=25˚C L1=100µH C1=22µF RV5VH101 3.6 3.4 3.2 2.8 3.0 2.4 2.6 2.2 2.0 Output Current IOUT(mA) Output Voltage VOUT1(V) 100 140 120 Topt=25˚C L1=220µH C1=22µF VIN=0.9V VIN=1.2V VIN=1.5V VIN=2.0V RV5VH201 3.6 3.4 2.8 3.0 3.2 2.6 2.2 2.4 2.0 Output Current IOUT(mA) Output Voltage VOUT(V) 100 200 300 400 500 Topt=25˚C L1=27µH C1=96µF VIN=1.2V VIN=0.9V VIN=2.0V VIN=1.5V RV5VH202 6.0 5.5 4.5 5.0 4.0 3.5 3.0 Output Current IOUT(mA) Output Voltage VOUT(V) 100 200 300 400 500 Topt=25˚C L1=27µH C1=96µF VIN=0.9V VIN=1.5V VIN=4.0V VIN=2.0V VIN=3.0V RV5VH102 6.0 5.5 4.5 5.0 4.0 3.5 3.0 Output Current IOUT(mA) Output Voltage VOUT1(V) 100 150 200 250 300 Topt=25˚C L1=100µH C1=22µF VIN=0.9V VIN=1.5V VIN=2.0V VIN=4.0V VIN=3.0V RV5VH102 6.0 5.5 4.5 5.0 4.0 3.5 3.0 Output Current IOUT(mA) Output Voltage VOUT1(V) 100 150 200 250 300 Topt=25˚C L1=220µH C1=22µF VIN=0.9V VIN=1.5V VIN=2.0V VIN=4.0V VIN=3.0V 2) Output Voltage vs. Output Current (RV5VH2××)

RV5VH1××/RV5VH2×× 3) Efficiency vs. Output Current (RV5VH1××) RV5VH101 100 Output Current IOUT(mA) Efficiency η(%) 0.01 0.1 100 Topt=25˚C L1=100µH C1=22µF VIN=0.9V VIN=1.2V VIN=2.0V VIN=1.5V RV5VH101 100 Output Current IOUT(mA) Efficiency η(%) 0.01 0.1 100 Topt=25˚C L1=220µH C1=22µF VIN=1.2V VIN=2.0V VIN=1.5V VIN=0.9V RV5VH102 100 Output Current IOUT(mA) Efficiency η(%) 0.1 100 1000 Topt=25˚C L1=100µH C1=22µF VIN=1.5V VIN=0.9V VIN=2.0V VIN=3.0V VIN=4.0V RV5VH102 100 Output Current IOUT(mA) Efficiency η(%) 0.1 100 1000 Topt=25˚C L1=220µH C1=22µF VIN=1.5V VIN=0.9V VIN=2.0V VIN=3.0V VIN=4.0V RV5VH201 Output Current IOUT(mA) Efficiency η(%) 0.01 0.1 100 1000 Topt=25˚C L1=27µH C1=96µF VIN=1.5V VIN=0.9V VIN=1.2V VIN=2.0V RV5VH202 Output Current IOUT(mA) Efficiency η(%) 0.1 100 1000 Topt=25˚C L1=27µH C1=96µF VIN=1.5V VIN=0.9V VIN=2.0V VIN=3.0V VIN=4.0V 4) Efficiency vs. Output Current (RV5VH2××)

RV5VH1××/RV5VH2×× 5) DC/DC1 Output Voltage vs. Temperature RV5VH1××/2×× 3.3 3.0 3.2 3.1 2.9 2.8 2.7 Temperature Topt(˚C) Output Voltage VOUT(V) –60 –40 –20 100 VIN=1.2V L1=100µH C1=22µF IOUT=10mA IOUT=5mA IOUT=0A RV5VH1××/2×× 5.3 5.0 5.2 5.1 4.9 4.8 4.7 Temperature Topt(˚C) Output Voltage VOUT(V) –60 –40 –20 100 VIN=3V L1=100µH C1=22µF IOUT=10mA IOUT=0A IOUT=1mA RV5VH1××/2×× 150 125 130 135 140 145 100 105 110 115 120 Temperature Topt(˚C) Oscillator Frequency fosc(kHZ) –60 –40 –20 100 VOUT1=3V RV5VH1××/2×× 150 125 130 135 140 145 100 105 110 115 120 Temperature Topt(˚C) Oscillator Frequency fosc(kHZ) –60 –40 –20 100 VOUT1=5V RV5VH1××/2×× Temperature Topt(˚C) Oscillator Duty Cycle Maxdty(%) –60 –40 –20 100 VOUT1=3V RV5VH1××/2×× Temperature Topt(˚C) Oscillator Duty Cycle Maxdty(%) –60 –40 –20 100 VOUT1=5V 7) Oscillator Duty Cycle vs. Temperature 6) Oscillator Frequency vs. Temperature

RV5VH1××/RV5VH2×× 8) On Resistance of LX vs. Supply Voltage RV5VH1×× 5.0 4.0 4.5 2.5 3.0 2.0 3.5 0.0 1.5 1.0 0.5 Supply Voltage VOUT1(V) On Resistance Ron (Ω) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 85˚C 25˚C –40˚C RV5VH201 Temperature Topt(˚C) Output Current IOUT(mA) –60 –40 –20 100 VOUT1=3V “L” Output Current “H” Output Current RV5VH202 Temperature Topt(˚C) Output Current IOUT(mA) –60 –40 –20 100 VOUT1=5V “L” Output Current “H” Output Current RV5VH1××/2×× 1.2 1.4 1.6 1.8 0.2 0.4 0.6 0.8 Output Current IOUT(mA) Start-up/Hold-on Voltage Vstart/Vhold(V) Topt=25˚C VOUT1=3V L1=100µH C1=22µF Vstart Vhold RV5VH101 10–0 10–6 10–5 10–4 10–2 10–1 Input Voltage VIN(V) Input Current IIN(A) 0.0 1.0 1.5 2.0 2.5 0.5 3.0 Topt=25˚C CSW=GND L1=100µH C1=22µF IOUT=30mA IOUT=5mA IOUT=1mA IOUT=0A 10) Start-up/Hold-on Voltage vs. Output Current 9) EXT1 Output Current vs. Temperature 11) Input Current vs. Intput Voltage

RV5VH1××/RV5VH2×× 12) Output Voltage vs. Output Current RV5VH101 –14 –10 –12 Output Current IOUT(mA) Output Voltage VOUT(V) Topt=25˚C VIN=1.2V VOUT1=3V VSET –6V VSET –9V VSET –12V VSET –3V RV5VH1××/2×× 0.010 –0.010 –0.004 –0.002 0.000 0.002 0.004 0.006 0.008 –0.006 –0.008 Temperature Topt(˚C) Feed Back Voltage VFB(V) –60 –40 –20 100 RV5VH1××/2×× Temperature Topt(˚C) Output Current IOUT(mA) –60 –40 –20 100 VOUT1=3V “L” Output Current “H” Output Current RV5VH1××/2×× Temperature Topt(˚C) Output Current IOUT(mA) –60 –40 –20 100 VOUT1=5V “L” Output Current “H” Output Current 14) EXT2 Output Current vs. Temperature 13) DC/DC2 Feed Back Voltage vs. Temperature

• DC/DC Converter 2

RV5VH1××/RV5VH2×× 15) EXT2 Oscillator Frequency vs. Temperature RV5VH1××/2×× 150 100 115 120 125 130 135 140 145 110 105 Temperature Topt(˚C) Oscillator Frequency fosc(kHZ) –60 –40 –20 100 VOUT1=3V RV5VH1××/2×× 150 100 115 120 125 130 135 140 145 110 105 Temperature Topt(˚C) Oscillator Frequency fosc(kHZ) –60 –40 –20 100 VOUT1=5V RV5VH1××/2×× Temperature Topt(˚C) Oscillator Duty Cycle Maxdty(%) –60 –40 –20 100 VOUT1=3V RV5VH1××/2×× Temperature Topt(˚C) Oscillator Duty Cycle Maxdty(%) –60 –40 –20 100 VOUT1=5V RV5VH1××/2×× 2.0 0.0 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.4 0.2 Temperature Topt(˚C) CSW ON/OFF Voltage (V) –60 –40 –20 100 VOUT1=3V 17) CSW ON/OFF Voltage vs. Temperature 16) EXT2 Oscillator Duty Cycle vs. Temperature

RV5VH1××/RV5VH2×× 18) Detector Threshold Voltage vs. Temperature RV5VH1××/2×× 3.0 2.5 2.7 2.8 2.9 2.6 Temperature Topt(˚C) Detector Threshold Voltage VDET(V) –60 –40 –20 100 +VDET –VDET RV5VH1××/2×× 5.0 4.5 0.0 2.0 1.5 3.0 2.5 4.0 3.5 1.0 0.5 VOUT1 Output Voltage VOUT1(V) Output Current VOUT(V) 85˚C 25˚C –40˚C RV5VH1××/2×× VOUT1 Output Voltage VOUT1(V) DOUT Output Current IDOUT(mA) 85˚C 25˚C –40˚C RV5VH1××/2×× 0.7 0.6 0.0 0.4 0.3 0.5 0.1 0.2 VSEN Output Voltage VSEN(V) VSEN Output Current IVSEN(µA) 85˚C 25˚C –40˚C RV5VH1××/2×× 0.01 0.1 Load Capacitance COUT(µF) Output Delay Time tp(ms) 0.0001 0.1 0.01 0.001 tPLH tPHL VOUT1=3V 22) Output Delay Time vs. Load Capacitance 20) DOUT Output Current vs. VOUT1 Output Voltage 19) VOUT1 Output Voltage vs. Output Current 21) VSEN Output Current vs. VSEN Output Voltage

• Voltage Detector

Error Amp.1 Error Amp.2 VFM2 VFM1 OSC p_shift DC/DC CONVERTER CONTROLLER (BOOST / INVERTING OUTPUT FOR LCD) RV5VH3×× PIN CONFIGURATION

• 8 pin SSOP (0.65mm pitch)

RV5VH3×× PIN DESCRIPTION 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. Pin No. Symbol Control Switch for DC/DC1, 2 FB1 Input for DC/DC1 Error Amplifier VDD Power Supply for Device Itself. Sensing Pin for Reset. EXT1 External Transistor Drive Pin for DC/DC1 (CMOS Output) GND Ground Pin EXT2 External Transistor Drive Pin for DC/DC2 (CMOS Output) FB2 Input for DC/DC2 Error Amplifier DOUT Output for Voltage Detector Symbol Item Ratings Unit VDD VDD Pin Voltage V DOUT DOUT Pin Voltage V VCSW CSW Pin Voltage –0.3 to VDD+0.3 V VEXT1, 2 EXT1, 2 Pin Voltage –0.3 to VDD+0.3 V VFB FB1,2 Pin Voltage –0.3 to VDD+0.3 V IEXT1, 2 EXT1, 2 Output Current ±50 mA PD Power Dissipation 300 mΩ Topt Operating Temperature –40 to +85 Tstg Storage Temperature –55 to +125 Tsolder Lead Temperature (Soldering) 260˚C 10sec ABSOLUTE MAXIMUM RATINGS GND=0V

RV5VH3×× Symbol Item Conditions MIN. TYP. MAX. Unit VSET1 Output Voltage Setting 1 2.05 V VFB1 Feed Back Volatage 1 1.950 2.000 2.050 V VINmax Maximum Input Voltage V VOPTmin Minimum Operating Voltage Specified as a VDD 1.8 V Voltage for Device Operation ISS11 Supply Current11*2 CSW=“H”, FB1=1.9V µA ISS12 Supply Current12*2 CSW=“H”, FB1=2.1V µA Istandby Standby Current*3 CSW=“L” µA IEXT1H EXT1 “H” Output Current VEXT1=VDD–0.4V 1.5 mA IEXT1L EXT1 “L” Output Current VEXT1=0.4V mA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle ON (VEXT1=“L”) ∆VFB1 Feed Back Voltage Temp.Coefficient ±100 ppm/˚C ∆Topt VCSWH CSW “H” Input Voltage 1.6 VDD V VCSWL CSW “L” Input Voltage 0.4 V ICSWleak CSW Input Leakage Current CSW=3.0V or CSW=0V –0.5 0.5 µA * ) VDD=3.0V, IOUT=10mA : unless otherwise specified. (See Typical Application) *1 ) Adjustable by external resistors (to 30V). *2 ) Supply current for DC/DC1. Supply current for VD or external resistors are excluded. *3 ) Standby current includes supply current for DC/DC1, 2 and VD. VDD=3.0V, Topt=25˚C

• RV5VH301 DC/DC Converter 1

RV5VH3×× DC/DC Converter 2 Symbol Item Conditions MIN. TYP. MAX. Unit VSET2 Output Voltage Setting 1 V VFB2 Feed Back Volatage 1 –20 mV VINmax Maximum Input Voltage V VOPTmin Minimum Operating Voltage Specified as the VDD 1.8 V Voltage for Device Operation ISS21 Supply Current21*2 CSW=“H”, FB2=0.1V µA ISS22 Supply Current22*2 CSW=“H”, FB2=–0.1V µA IEXT2H EXT2 “H” Output Current VEXT2=VDD–0.4V mA IEXT2L EXT2 “L” Output Current VEXT2=0.4V mA fosc Maximum Oscillator Frequency 110 130 150 kHz Maxdty Oscillator Duty Cycle ON (VEXT2=“L”) ∆VFB2 Feed Back Voltage Temp.Coefficient ±30 µV/˚C ∆Topt * ) VDD=3.0V : unless otherwise specified. (See Typical Application) *1 ) Adjustable by external resistors (to -30V). *2 ) This value shows only the supply current of DC/DC2, not include the supply current of external resistors. VDD=3.0V, Topt=25˚C

RV5VH3×× Voltage Detector Symbol 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 1.2 µA VINmax Maximum Input Voltage V VOPTmin Minimum Operating Voltage Specified as the VDD 1.8 V Voltage for Device Operation IOUT Output Current VDS=0.5V, VDD=1.5V 1.0 2.0 mA VDS=0.5V, VDD=3.0V 4.0 5.0 mA tPLH Output Delay 100 µs ∆VOUT1 DetectorThreshold Temp.Coefficient ±100 ppm/˚C ∆Topt IDOUTleak DOUT Leakage Current 0.03 0.5 µA * ) VDD=3.0V : unless otherwise specified. *1 ) This value only shows the supply current of voltage detector. VDD=3.0V, Topt=25˚C

RV5VH3×× OPERATION

• DC/DC Converter 1 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, it will stop oscillation. The internal feed back resistor “R” which is fixed and adjusted by laser trim can make the feed back input voltage to “Error Amp.1” stable. Pulses from the “OSC” circuit have a duty cycle of 50% and it becomes 65 to 75%(at high side) through the “P_shift” circuit. These clock pulses control VFM circuit and make it possible to operate as a boost converter. The output of “EXT1” is driven by CMOS buffer and an external NMOS driver is also available instead of an NPN transis- tor, in such cases the Rb and the Cb are not necessary. The DC/DC1 can be shut down by CSW pin. When the CSW pin is “H”, VDD level, the DC/DC1 is enabled and when the CSW pin is “L”, GND level, the DC/DC1 is disabled. The EXT1 pin outputs “L” while the DC/DC1 is disabled.
• Set Output Voltage DC/DC1 VOUT1 is described as follows : VOUT1 : R1+R2=VFB1 : R2 DC/DC1 controls VFB1 to be a constant voltage, VOUT1=VFB1 × (R1+R2) / R2 thus, any output voltage of DC/DC1 can be set by changing R1 or/and R2. Certain temperature coefficient of VOUT1 can be set by using R1, R2 having such temperature characteristics. FB1 EXT1 RV5VH3×× Error Amp.1 VFM1 CSW OSC p_shift C SBD VOUT1 VIN NPN Tr. Cb Rb Vref VDD

RV5VH3××

• DC/DC Converter 2 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 sup- ply such as VOUT1. When the feed back voltage to the Error Amp.2 is higher than the ground voltage, the error amplifier enables oscillation otherwise, it will stop oscillation. Pulses from the “OSC” circuit have a duty cycle of 50% and it makes VFM operation allowable. There might be certain cases that the duty cycles become smaller temporarily at light load current. The output of “EXT2” is driven by CMOS buffer operated VDD and GND. A PMOS driver will be connected to the “EXT2” pin and its switching operation generates negative output voltage through energy accumulated in an inductor. The DC/DC1 can be shut down by CSW pin. When the CSW pin is High, VDD level, the DC/DC1 is enabled and when the CSW pin is “L”, GND level, the DC/DC1 is disabled. The EXT2 pin outputs “H” while the DC/DC2 is disabled.
• Set Output Voltage DC/DC 2 VOUT2 is described as follows: VREF : R1=|–VOUT2| : R2 The FB2 voltage is controlled to 0V and VREF is provided externally |–VOUT2|=VREF×R2/R1, thus, any output voltage of DC/DC2 can be set by R1 and R2. Certain temperature coefficient of VOUT2 can be set by using R1, R2 having such temperature characteristics. L FB2 VOUT2 VDD EXT2 RV5VH3×× Error Amp.2 VFM2 CSW SBD PMOS OSC VREF

RV5VH3×× DOUT RV5VH3×× Pull-up Output Tr. Vref Tr.1 VDD 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 open-drain output and a pull up resistor is necessary. Oepration Diagram The output is pulled up to VDD voltage

• Voltage Detector A B Reset Voltage Detector Threshold GND GND Output Voltage Hysteresis Range +VDET –VDET Step Step 1 Step 2 Step 3 Step 4 Step 5 Comparator(+) Pin Input Voltage A B B B A Comparator Output H L L L H Tr. 1 OFF ON ON ON OFF Output Tr. OFF ON Indefinite ON OFF Step 1. Output Voltage is equal to Pull-up Voltage Step 2. When Input voltage(VDD) reaches to the state of VREF≥VDD×(R2+R3)/(R1+R2+R3) at point A, the output of the comparator is reversed, so that the output voltage becomes to GND. Step 3. Output Voltage becomes indefinite when Power Source Voltage (VDD) is smaller than Minimum Operating Voltage. When the output is pulIed up, Output becomes pull-up voltage and GND. Step 4. Output Voltage becomes to GND. Step 5. When Input voltage(VDD) reaches to the state of VREF≤VDD×R2/(R1+R2) at point B, the output of the comparator is reversed, so that the output voltage becomes to pull-up voltage. A : R2+R3 × VDD R1+R2+R3 B : × VDD R1+R2+R3

RV5VH3×× TYPICAL APPLICATION 1 CSW FB1 VDD EXT1 DOUT FB2 EXT2 GND Output DC/DC 2 Output DC/DC 1 PMOS SBD NPN Tr. SBD CoiI L1 : 100µH, L2 : 100µH Diode Schottky type capacitor C1 : 22µF(Ta), C2 : 22µF(Ta) C3 : 0.01µF (ceramic) C4 : 0.01µF (ceramic) C5 : 0.01µF (ceramic) PMOS 2SJ238 (TOSHIBA) NMOS 2SK1470 (SANYO) Resistor R1 : 100kΩ, R2 : 0 to 500kΩ R3 : 100kΩ R4 : 300Ω R5 : 0 to 500kΩ, R6 : 50kΩ

RV5VH3×× CSW FB1 VDD EXT1 DOUT FB2 EXT2 GND PMOS VIN SBD NPN Tr. SBD Output DC/DC 2 Output DC/DC 1 TYPICAL APPLICATION 2 CoiI L1 : 100µH, L2 : 100µH Diode Schottky type capacitor C1 : 22µF(Ta), C2 : 22µF(Ta) C3 : 0.01µF (ceramic) C4 : 0.01µF (ceramic) C5 : 0.01µF (ceramic) PMOS 2SJ238 (TOSHIBA) NPN Tr. 2SD1628G (SANYO) Resistor R1 : 100kΩ, R2 : 0 to 500kΩ R3 : 100kΩ R4 : 300Ω R5 : 0 to 500kΩ, R6 : 50kΩ

• 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.
• Invering DC/DC converter : DC/DC2 The oscillator can operate when CSW is “H”. When the CSW is “L” the EXT2 outputs VDD. The output voltage can be adjusted by R1 and R2 with FB2 of zero volt.
• VoItage Detector VDD pin can be monitored. This could be always operated with VDD. The DOUT pin outputs “L” when low voltage is detected with Nch open-drain output.

RV5VH3×× CSW FB1 VDD EXT1 DOUT FB2 EXT2 GND SBD3 PNP Tr. SBD1 NMOS PMOS VIN SBD2 Output DC/DC 2 Output DC/DC 1 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. : 2SB1120F Operation The VDD voltage can be supplied from another source than battery output and a reference voltage for DC/DC2 is supplied by the output of DC/DC1. The PMOS transistor can operate as a switch when the CSW is “L”.

• 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.
• Invering DC/DC converter : DC/DC2 The oscillator can operate when CSW is “H”. When the CSW is “L” the EXT2 outputs VDD. The output voltage can be adjusted by R1 and R2 with FB2 of zero volt.
• VoItage Detector VDD pin can be monitored. This could be operated all the time by VDD. The DOUT pin outputs “L” when low voltage is detected with Nch open-drain output. TYPICAL APPLICATION 3

RV5VH3×× TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current –15 –20 –10 –25 Output Current IOUT(mA) Output Voltage VOUT(V) VIN=3.6V 100 Output Current IOUT(A) Efficiency η(%) 0.0001 0.001 0.01 0.1 VIN=3.6V ±20V ±15V ±10V VOUT±5.0V 2) Efficiency vs. Output Current 3) CSW Load Transient Responce 1 –15 –10 –20 Time t(ms) Output Voltage VOUT(V) –50 100 150 200 VIN=3.6V, IOUT=1mA VOUT1 VOUT2 CSW –10 –15 –20 Time t(ms) Output Voltage VOUT(V) 500 1000 1500 VIN=3.6V, IOUT=1mA VOUT1 CSW VOUT2 4) CSW Load Transient Responce 2 * ) Please refer to Typical Application.

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: a b c Code

Contents

a 1 : Internal LX Driver Transister Type 2 : External EXT Driver Transister Type 3 : Variable Output Voltage Type b Serial (01, 02, 03) Number of Setting DC/DC1 Output Voltage and Setting VD Detect Voltage. c Designation of Taping type Ex. E1, E2 (refer to Taping Specifications, E2 type is prescribed as a standard.)

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. When the impedance of the GND connection is high, the potential within the IC is varied by switching current. This may result in unstableoperation of the IC.
• Use capacitor with good high frequency characteristics such as tantalum capacitor, aluminium electrolytic capacitor and ceramic capacitor. We recommend the use of a capacitor with an allowable voltage which is at least three times the output set voltage. This is because there may be the case where a spike-shaped high voltage is generated by the inductor when Lx transistor is turned OFF.
• Take the utmost care when choosing an inductor. Namely, choose such an inductor that has sufficiently small d.c. resistance and large allowable current, and hardly reaches magnetic saturation. When the inductance value of the inductor is small, there may be the case where ILX exceeds the absolute maximum ratings at the maximum load. Use an inductor with an appropriate inductance. (See OUTPUT CURRENT and SELECTION OF PERIPHERAL COMPONENTS sections.)
• Use a diode of a Schottky type with high switching speed, and also take care of the rated current. (See OUTPUT CURRENT and SELECTION OF PERIPHERAL COMPONENTS sections.) The performance of power source circuits using these ICs largely depends upon the peripheral components. Take the utmost care in the selection of the peripheral components. In particular, design the peripheral circuits in such a manner that the values such as voltage, current and power of each component, PCB patterns and the IC do not exceed their respective rated values.