Datasheet RV5VH101-E1, RV5VH101-E2, RV5VH102-E1, RV5VH102-E2, RV5VH201-E1 Datasheet (RICOH)

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Page 1

APPLICATION MANUAL

DC/DC CONVERTER

CONTROLLER

RV5VH SERIES

NO. EA-049-0006

Page 2

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 converters. 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 voltage 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

• Dual DC/DC converter system

.................................

DC/DC1 : step-up DC/DC2 : inverting(negative voltage)

• Voltage Detector

..........................................................

Nch. Open Drain Output

• Low voltage operation available RV5VH1

××,RV5VH2××

..........................................

oscillator start-up from 0.8V

RV5VH3

××

.................................................................

oscillator start-up from 1.8V

• High Efficiency

.............................................................

TYP. 80%

• Low Supply Current

• High accuracy feedback sensing

...............................

TYP. ±2.5%

• Sleep Mode RV5VH1

××, RV5VH2××

..........................................

DC/DC 2

RV5VH3

××

.................................................................

DC/DC1, 2

• Available to adjust temperature drift

.........................

DC/DC2 : with external resistor (RV5VH2

××, RV5VH3××)

coefficient of output voltage

• Small Package

..............................................................

8pin SSOP(0.65mm pitch)

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

Page 3

BLOCK DIAGRAM

–

CSW

SEN

VOUT1

LX1

DOUT

EXT2

GND

Vref

Error Amp.1

Error Amp.2

VFM2

LX lim.

VFM1 OSC

p_shift

–

DC/DC CONVERTER CONTROLLER

(BOOST / INVERTING)

RV5VH1××/ RV5VH2××

• RV5VH1××

–

CSW

SEN

VOUT1

EXT1

OUT

EXT2

GND

Vref

Error Amp.1

Error Amp.2

VFM2

VFM1 OSC

p_shift

–

• RV5VH2××

Page 4

RV5VH1××/RV5VH2××

PIN CONFIGURATION

1 2 3 4

8 7 6 5

• 8 pin SSOP (0.65mm pitch)

PIN DESCRIPTION

• RV5VH1××

Pin No. Symbol Description

1 CSW Control switch for DC/DC2

2VSEN Sensing Pin for Voltage Detector

3VOUT1 Output for DC/DC1, Power supply for the device

4LX1 Output for DC/DC1, switching (Nch Open-Drain)

5 GND Ground

6 EXT2 External Transistor drive pin for DC/DC2 (CMOS output)

7 FB Input for DC/DC2 Error Amplifier

OUT Output for Voltage detector

• RV5VH2××

Pin No. Symbol Description

1 CSW Contol switch for DC/DC2

2VSEN Sensing Pin for Voltage Detector

3VOUT1 Output for DC/DC1, Power supply for the device

4 EXT1 External Transistor drive pin for DC/DC1 (CMOS output)

5 GND Ground

6 EXT2 External Transistor drive pin for DC/DC2 (CMOS output)

7 FB Input for DC/DC2 Error Amplifier

OUT Output for Voltage Detector

Page 5

RV5VH1××/RV5VH2××

ABSOLUTE MAXIMUM RATINGS

• RV5VH1××

Symbol Item Ratings Unit

VOUT1 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 +0.3 V

ILX1 LX1 Output Current 400 mA

IEXT2 EXT2 Output Current ±50 mA

PD Power Dissipation 300 mW

Topt Operating Temperature –40 to +85 ˚C

Tstg Storage Temperature –55 to +125 ˚C

Tsolder Lead Temperature (Soldering) 260˚C 10sec

Page 6

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 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

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 ˚C

Tstg Storage Temperature –55 to +125 ˚C

Tsolder Lead Temperature (Soldering) 260˚C 10sec

Page 7

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 10 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 *

No Load, CSW=“L” 10 µA

ILX LX Switching Current VLX=0.4V 100 mA

ILXleak LX Leakage Current VLX=6.0V, VIN=3.5V 0.03 1 µA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle ON (VLX=“L”) 50 65 80 %

η Efficiency 80 %

VLXlim Voltage Limit for LX Switch for LX pin 0.4 0.8 V

∆V

OUT1

Output Voltage Temp. Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

VOUT1=3.0V, Topt=25˚C

Page 8

RV5VH1××/RV5VH2××

DC/DC Converter 2

Symbol Item Conditions MIN. TYP. MAX. Unit

VSET Set Output Voltage *

VFB Feed Back Voltage –20 0 20 mV

VIN Maximum Input Voltage 10 V

VOPTmin Minimum Operating Voltage IOUT=1mA 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=0.4V 4 8 mA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle VEXT2=“H” 40 50 60 %

VCSWH CSW “H” Input Voltage VOUT1=3.0V 1.6 VOUT1 V

VCSWL CSW “L” Input Voltage VOUT1=3.0V 0 0.4 V

ICSWleak CSW Input Leakage Current VOUT1=3.0V –0.5 0.5 µA

∆V

Feed Back Voltage Temp.Coefficient –40˚C≤Topt≤85˚C ±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

Page 9

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 10 V

VOPTmin Minimum Operating Voltage 1.8 V

IOUT Output Current

DS=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 10 V

tPLH Output Delay 100 µs

∆V

OUT1

DetectorThreshold Temp.Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

DOUTleak 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)

Page 10

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 10 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 *

No Load, CSW=“L” 15 µA

ILX LX Switching Current VLX=0.4V 100 mA

ILXleak LX Leakage Current VLX=6.0V, VIN=5.5V 0.03 1 µA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle ON (VLX=“L”) 55 70 85 %

η Efficiency 80 %

VLXlim Voltage Limit for LX Switch 0.4 0.8 V

∆V

OUT1

Output Voltage Temp. Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

Page 11

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 0 V

VFB Feed Back Voltage 0 mV

VIN Maximum Input Voltage 10 V

VOPTmin Minimum Operating Voltage IOUT=1mA 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=0.4V 7 14 mA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle VEXT2=“H” 40 50 60 %

VCSWH CSW “H” Input Voltage VOUT1=5.0V 1.6 VOUT1 V

VCSWL CSW “L” Input Voltage VOUT1=5.0V 0 0.4 V

ICSWleak CSW Input Leakage Current VOUT1=5.0V –0.5 0.5 µA

∆V

Feed Back Voltage Temp.Coefficient –40˚C≤Topt≤85˚C ±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.

Page 12

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*

1.8 µA

VINmax Maximum Input Voltage 10 V

VOPTmin Minimum Operating Voltage*

1.8 V

IOUT Output Current

DS=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

∆V

OUT1

DetectorThreshold Temp.Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

DOUTleak DOUT Leakage Current 0.03 0.5 µA

) VOUT1=3.0V, Topt=25˚C, unless otherwise specified. (See Typical Application)

Page 13

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 10 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 *

IOUT=0mA, CSW=“L” 80 µA

IEXT1H EXT1 “H” Output Current VEXT2=VOUT1–0.4V 1.5 3 mA

IEXT1L EXT1 “L” Output Current VEXT2=0.4V 4 8 mA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle ON (VLX=“L”) 50 65 80 % ∆V

OUT1

Output Voltage Temp. Coefficient –40˚C≤Topt≤85˚C ±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.

Page 14

RV5VH1××/RV5VH2××

Symbol Item Conditions MIN. TYP. MAX. Unit

VSET Output Voltage Setting Range *

VFB Feed Back Voltage –20 0 20 mV

VIN Maximum Input Voltage 10 V

VOPTmin Minimum Operating Voltage*

IOUT=1mA 1.8 V

ISS2 Supply Current2*

CSW= “H” IOUT=0mA 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=0.4V 4 8 mA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle VEXT2=“H” 40 50 60 %

VCSWH CSW “H” Input Voltage VOUT1=3.0V 1.6 VOUT1 V

VCSWL CSW “L” Input Voltage VOUT1=3.0V 0 0.4 V

ICSWleak CSW Input Leakage Current CSW=3.0V –0.5 0.5 µA

∆V

Feed Back VoltageTemp. Coefficient –40˚C≤Topt≤85˚C ±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

Page 15

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*

1.2 µA

VINmax Maximum Input Voltage 10 V

VOPTmin Minimum Operating Voltage*

1.8 V

IOUT Output Current

DS=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

∆V

OUT1

DetectorThreshold Temp.Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

DOUTleak 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.

Page 16

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 10 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 *

IOUT=0mA, CSW=“L” 40 µA

IEXT1H EXT1 “H” Output Current VEXT2=VOUT1–0.4V 2 4 mA

IEXT1L EXT1 “L” Output Current VEXT2=0.4V 7 14 mA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle ON (VLX=“L”) 55 70 85 %

η Efficiency 80 %

∆V

OUT1

Output Voltage Temp. Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

Page 17

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 *

VFB Feed Back Voltage 0 mV

VIN Maximum Input Voltage 10 V

VOPTmin Minimum Operating Voltage*

IOUT=1mA 1.8 V

ISS2 Supply Current2*

CSW= “H”, 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=0.4V 7 14 mA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle VEXT2=“H” 40 50 60 %

VCSWH CSW “H” Input Voltage VOUT1=5.0V 1.6 VOUT1 V

VCSWL CSW “L” Input Voltage VOUT1=5.0V 0 0.4 V

ICSWleak CSW Input Leakage Current CSW=5.0V –0.5 0.5 µA

∆V

Feed Back Voltage Temp.Coefficient –40˚C≤Topt≤85˚C ±30 µV/˚C

∆Topt

VOUT1=5.0V, Topt=25˚C

Page 18

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*

1.8 µA

VINmax Maximum Input Voltage 10 V

VOPTmin Minimum Operating Voltage*

1.8 V

IOUT Output Current

DS=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

∆V

OUT1

Detector ThresholdTemp.Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

DOUTleak DOUT Leakage Current 0.03 0.5 µA

Page 19

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 V

OUT1 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 L

X1 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 transistor. The DC/DC1 can be shut down by CSW pin. When the CSW pin is High, V

DD 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.

SBD

OUT1

VOUT1

LX1

–

VLX lim.

OSC

Vref

p_shift

VFM1

VIN

RV5VH1××

Error Amp.1

SBD

OUT1

VOUT1

EXT1

–

OSC

Vref

p_shift

RV5VH2××

Error Amp.1

VFM1

NPN Tr.

Page 20

RV5VH1××/RV5VH2××

OUT2

VOUT1

EXT2

–

RV5VH1××/RV5VH2××

Error Amp.2

VFM2

CSW

SBD

PMOS

OSC

C2 R2

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 V

OUT1.

When the feed back voltage to the cmp2 is higher than the ground voltage the error amplifier enables oscillation or otherwise 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 V

OUT1 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”, V

DD 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

OUT2 is described as follows:

OUT1:R1=|–VOUT2| : R2 / The FB voltage is controlled to 0V and VOUT1 is provided externally

|–V

OUT2|=VOUT1 × R2/R1

thus, any output voltage of DC/DC2 can be set by changing R1 or/and R2. Certain temperature coefficient of V

OUT2 can be set by using R1,R2 having such temperature characteristics.

• DC/DC Converter 2

Page 21

RV5VH1××/RV5VH2××

VSEN

DOUT

RV5VH1××/RV5VH2××

Pull-up

Output Tr.

–

Vref

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 V

SEN pin voltage.

The D

OUT is Nch open-drain output and a pull up resistor is necessary.

Oepration Diagram

SEN pin is pulled up to VOUT1 voltage

• Voltage Detector

Reset Voltage Detector Threshold

GND

Output Voltage

1 2 3 4 5

Hysteresis Range

+VDET –V

DET

Step Step 1 Step 2 Step 3 Step 4 Step 5

Comparator(+) Pin

Input Voltage

ABBBA

Comparator Output

HLLLH

Tr. 1 OFF ON ON ON OFF

Output Tr

OFF ON

Indefinite

ON OFF

Rb+Rc

VSEN

Ra+Rb+Rc

SEN

Ra+Rb+Rc

Step 1. Output Voltage is equal to Pull-up Voltage. Step 2. When Input voltage (V

SEN) 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 (V

SEN) 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(V

SEN) 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.

Page 22

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 >

OUT

VOUT

CLLx Tr

ILmin

ILmax

topen

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:

∆I=ILmax–ILmin=V

IN · ton/L=(VOUT–VIN) · topen/L

..........................................

Equation 1

wherein T=1/fosc=ton+toff

duty (%)=ton/T · 100=ton · fosc · 100

topen≤toff

In Equation 1,V

IN · 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).

Page 23

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 V

IN is

decreased in an amount corresponding to the voltage reduction caused by LxSW when IL is large or V

IN is

small. Furthermore, It is required that with respect to V

OUT, Vf of the diode (about 0.3V in the case of a

Schottky type diode) be taken into consideration.

When I

LX 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 :

ON=∫

ton

(VIN · IL (t)) dt=∫

ton

(VIN2· t/L) dt

· 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.

Thus, P

OFF =∫

topen

(VIN · IL (t)) dt=∫

topen

(VIN · (VOUT–VIN) · t/L)dt

IN · (VOUT –VIN) · topen

/(2 · L)

Here, topen=V

IN · ton/(VOUT–VIN) from Equation 1, and when this is substituted into the above equation.

· ton2/(2 · L · (VOUT–VIN))

............................................................................

Equation 3

Input power P

IN is (PON+POFF)/T. When this is converted in its entirely to the output.

IN=(PON+POFF)/T=VOUT · IOUT=POUT

.........................................................................

Equation 4

Equation 5 can be obtained as follows by solving Equation 4 for I

OUT by substituting Equation 2 and 3 into

Equation 4 :

OUT=VIN

· ton2/(2· L· T· (VOUT–VIN)

· maxdty2/(20000 · fosc · L · (VOUT–VIN))

...................................................

Equation 5

The peak current which flows through L · LxTr · SD is

ILmax=V

IN · ton/L

..........................................................................................................

Equation 6

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

Page 24

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

SEN

VOUT1

LX1

DOUT

EXT2

GND

PMOS

R2 C3

Output DC/DC1

Output DC/DC2

• RV5VH2××

CSW

SEN

VOUT1

EXT1

OUT

EXT2

GND

SBD

PMOS

R2 C3

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

Page 25

RV5VH1××/RV5VH2××

TEST CIRCUITS

CSW DOUT

EXT2

L1=100µH,220µH

GND

VSEN VOUT1 LX1

22µF

Fig.1 Test Circuit 1

CSW DOUT

EXT2

GND

SEN

VOUT1 LX1(EXT1)

100kΩ

150Ω

5Ω

(150Ω)

Oscilloscope

EXT1

Fig.2 Test Circuit 2

CSW DOUT

EXT2

GND

SEN

VOUT1 LX1

0.5V

Fig.3 Test Circuit 3

Page 26

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

EXT2

GND

VSEN VOUT1 LX1

100kΩ

Pulse Input

Oscilloscope

Fig.4 Test Circuit 4

CSW DOUT

EXT2

GND

SEN

VOUT1 EXT1

96µF27µH

2200pF

300Ω

Fig.5 Test Circuit 5

Page 27

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)

0 20 40 60 80 100 140120

VIN=0.9V

IN=1.2V

IN=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)

0 20 40 60 80 100 140120

Topt=25˚C L1=220µH C1=22µF

VIN=0.9V

IN=1.2V

IN=1.5V

IN=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)

0 100 200 300 400 500

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)

0 100 200 300 400 500

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)

0 50 100 150 200 250 300

Topt=25˚C L1=100µH C1=22µF

VIN=0.9V

IN=1.5V

IN=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)

0 50 100 150 200 250 300

Topt=25˚C L1=220µH C1=22µF

VIN=0.9V

IN=1.5V

IN=2.0V

VIN=4.0V

VIN=3.0V

2) Output Voltage vs. Output Current (RV5VH2××)

Page 28

RV5VH1××/RV5VH2××

3) Efficiency vs. Output Current (RV5VH1××)

RV5VH101

100

Output Current IOUT(mA)

Efficiency η(%)

0.01 0.1 1 10 100

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 1 10 100

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 1 10 100 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 1 10 100 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 1 10 100 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 1 10 100 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××)

Page 29

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 0 20 40 60 80 100

VIN=1.2V L1=100µH C1=22µF

IOUT=10mA I

OUT=5mA

OUT=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 0 20 40 60 80 100

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 0 20 40 60 80 100

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 0 20 40 60 80 100

VOUT1=5V

RV5VH1××/2××

Temperature Topt(˚C)

Oscillator Duty Cycle Maxdty(%)

–60 –40 –20 0 20 40 60 80 100

VOUT1=3V

RV5VH1××/2××

Temperature Topt(˚C)

Oscillator Duty Cycle Maxdty(%)

–60 –40 –20 0 20 40 60 80 100

VOUT1=5V

7) Oscillator Duty Cycle vs. Temperature

6) Oscillator Frequency vs. Temperature

Page 30

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

12 10

16 14

6 4 2

Temperature Topt(˚C)

Output Current IOUT(mA)

–60 –40 –20 0 20 40 60 80 100

VOUT1=3V

“L” Output Current

“H” Output Current

RV5VH202

12 10

16 14

6 4 2

Temperature Topt(˚C)

Output Current IOUT(mA)

–60 –40 –20 0 20 40 60 80 100

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)

0 20304010 50

Topt=25˚C VOUT1=3V L1=100µH C1=22µF

Vstart

Vhold

RV5VH101

–0

–6

–5

–4

–3

–2

–1

Input Voltage VIN(V)

Input Current IIN(A)

0.0 1.0 1.5 2.0 2.50.5 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

Page 31

RV5VH1××/RV5VH2××

12) Output Voltage vs. Output Current

RV5VH101

0 –2 –4 –6

–14

–10 –12

–8

Output Current IOUT(mA)

Output Voltage VOUT(V)

04861012214

Topt=25˚C VIN=1.2V VOUT1=3V

VSET –6V

VSET –9V

VSET –12V

SET –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 0 20 40 60 80 100

RV5VH1××/2××

4 2

Temperature Topt(˚C)

Output Current IOUT(mA)

–60 –40 –20 0 20 40 60 80 100

VOUT1=3V

“L” Output Current

“H” Output Current

RV5VH1××/2××

4 2

Temperature Topt(˚C)

Output Current IOUT(mA)

–60 –40 –20 0 20 40 60 80 100

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

Page 32

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 0 20 40 60 80 100

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 0 20 40 60 80 100

VOUT1=5V

RV5VH1××/2××

44 42

Temperature Topt(˚C)

Oscillator Duty Cycle Maxdty(%)

–60 –40 –20 0 20 40 60 80 100

VOUT1=3V

RV5VH1××/2××

44 42

Temperature Topt(˚C)

Oscillator Duty Cycle Maxdty(%)

–60 –40 –20 0 20 40 60 80 100

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 0 20 40 60 80 100

VOUT1=3V

17) CSW ON/OFF Voltage vs. Temperature

16) EXT2 Oscillator Duty Cycle vs. Temperature

Page 33

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 0 20 40 60 80 100

+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)

012345

85˚C

25˚C

–40˚C

RV5VH1××/2××

20 18

8 6

12 10

16 14

4 2

VOUT1 Output Voltage VOUT1(V)

DOUT Output Current IDOUT(mA)

01234567

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)

01234567

85˚C

25˚C

–40˚C

RV5VH1××/2××

0.01

0.1

Load Capacitance COUT(µF)

Output Delay Time tp(ms)

0.0001 0.10.010.001

tPLH

tPHL

VOUT1=3V

22) Output Delay Time vs. Load Capacitance

20) D

OUT Output Current vs. VOUT1 Output Voltage

19) V

OUT1 Output Voltage vs. Output Current

21) V

SEN Output Current vs. VSEN Output Voltage

• Voltage Detector

Page 34

BLOCK DIAGRAM

–

CSW

FB1

EXT1

OUT

FB2

EXT2

GND

Vref

Error Amp.1

Error Amp.2

VFM2

VFM1 OSC

p_shift

–

DC/DC CONVERTER CONTROLLER

(BOOST / INVERTING OUTPUT FOR LCD)

RV5VH3××

PIN CONFIGURATION

1 2 3 4

8 7 6 5

• 8 pin SSOP (0.65mm pitch)

Page 35

RV5VH3××

PIN DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

Pin No. Symbol Description

1 CSW Control Switch for DC/DC1, 2

2 FB1 Input for DC/DC1 Error Amplifier

3VDD Power Supply for Device Itself. Sensing Pin for Reset.

4 EXT1 External Transistor Drive Pin for DC/DC1 (CMOS Output)

5 GND Ground Pin

6 EXT2 External Transistor Drive Pin for DC/DC2 (CMOS Output)

7 FB2 Input for DC/DC2 Error Amplifier

OUT Output for Voltage Detector

Symbol Item Ratings Unit

VDD VDD Pin Voltage 12 V

DOUT DOUT Pin Voltage 12 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 ˚C

Tstg Storage Temperature –55 to +125 ˚C

Tsolder Lead Temperature (Soldering) 260˚C 10sec

ABSOLUTE MAXIMUM RATINGS

GND=0V

Page 36

RV5VH3××

Symbol Item Conditions MIN. TYP. MAX. Unit

VSET1 Output Voltage Setting 1 2.05 *

VFB1 Feed Back Volatage 1 1.950 2.000 2.050 V

VINmax Maximum Input Voltage 10 V

OPTmin Minimum Operating Voltage

Specified as a V

1.8 V

Voltage for Device Operation

ISS11 Supply Current11*

CSW=“H”, FB1=1.9V 15 60 µA

ISS12 Supply Current12*

CSW=“H”, FB1=2.1V 4 µA

Istandby Standby Current*

CSW=“L” 4 11 µA

IEXT1H EXT1 “H” Output Current VEXT1=VDD–0.4V 1.5 3 mA

IEXT1L EXT1 “L” Output Current VEXT1=0.4V 4 8 mA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle ON (VEXT1=“L”) 50 65 80 %

∆V

FB1

Feed Back Voltage Temp.Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

VCSWH CSW “H” Input Voltage 1.6 VDD V

VCSWL CSW “L” Input Voltage 0 0.4 V

CSWleak 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

ELECTRICAL CHARACTERISTICS

• RV5VH301

DC/DC Converter 1

Page 37

RV5VH3××

DC/DC Converter 2

Symbol Item Conditions MIN. TYP. MAX. Unit

VSET2 Output Voltage Setting 1 *

VFB2 Feed Back Volatage 1 –20 0 20 mV

VINmax Maximum Input Voltage 10 V

OPTmin Minimum Operating Voltage

Specified as the V

1.8 V

Voltage for Device Operation

ISS21 Supply Current21*

CSW=“H”, FB2=0.1V 15 60 µA

ISS22 Supply Current22*

CSW=“H”, FB2=–0.1V 4 µA

IEXT2H EXT2 “H” Output Current VEXT2=VDD–0.4V 2 4 mA

IEXT2L EXT2 “L” Output Current VEXT2=0.4V 4 8 mA

fosc Maximum Oscillator Frequency 110 130 150 kHz

Maxdty Oscillator Duty Cycle ON (VEXT2=“L”) 40 50 60 %

∆V

FB2

Feed Back Voltage Temp.Coefficient –40˚C≤Topt≤85˚C ±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

Page 38

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*

1.2 µA

VINmax Maximum Input Voltage 10 V

OPTmin Minimum Operating Voltage

Specified as the V

1.8 V

Voltage for Device Operation

IOUT Output Current

DS=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

∆V

OUT1

Detector ThresholdTemp.Coefficient –40˚C≤Topt≤85˚C ±100 ppm/˚C

∆Topt

DOUTleak 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

Page 39

RV5VH3××

OPERATION

• DC/DC Converter 1

The DC/DC1 can operate by an input voltage to the V

DD 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 transistor, 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”, V

DD 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

OUT1 is described as follows :

OUT1 : R1+R2=VFB1 : R2 DC/DC1 controls VFB1 to be a constant voltage,

OUT1=VFB1 ×(R1+R2) / R2

thus, any output voltage of DC/DC1 can be set by changing R1 or/and R2.

Certain temperature coefficient of V

OUT1 can be set by using R1, R2 having such temperature characteristics.

FB1

EXT1

–

RV5VH3××

Error Amp.1

VFM1

CSW

OSC

p_shift

SBD

OUT1

VIN

NPN Tr.

Vref

VDD

Page 40

RV5VH3××

• DC/DC Converter 2

The DC/DC2 can operate by an input voltage to the V

DD pin. A change in the VOUT2 will feed back to the internal error

amplifier through external voltage setting resistors. The V

REF voltage should be provided from externally fixed power sup-

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 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 V

DD and GND.

DD 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

OUT2 is described as follows:

REF : R1=|–VOUT2| : R2 The FB2 voltage is controlled to 0V and VREF is provided externally

|–V

OUT2|=VREF×R2/R1,

thus, any output voltage of DC/DC2 can be set by R1 and R2.

Certain temperature coefficient of V

OUT2 can be set by using R1, R2 having such temperature characteristics.

FB2

OUT2

VDD

EXT2

–

RV5VH3××

Error Amp.2

VFM2

CSW

SBD

PMOS

OSC

C2 R2

VREF

Page 41

RV5VH3××

DOUT

RV5VH3××

Pull-up

Output Tr.

–

Vref

Tr.1

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 D

OUT is Nch open-drain output and a pull up resistor is necessary.

Oepration Diagram

The output is pulled up to V

DD voltage

• Voltage Detector

Reset Voltage Detector Threshold

GND

Output Voltage

1 2 3 4 5

Hysteresis Range

+VDET –V

DET

Step Step 1 Step 2 Step 3 Step 4 Step 5

Comparator(+) Pin

Input Voltage

ABBBA

Comparator Output

HLL LH

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(V

DD) 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 (V

DD) 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(V

DD) 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.

R2+R3

VDD

R1+R2+R3

Page 42

RV5VH3××

TYPICAL APPLICATION 1

CSW

FB1

EXT1

OUT

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

Page 43

RV5VH3××

CSW

FB1

EXT1

OUT

FB2

EXT2

GND

PMOS

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

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.

• Invering DC/DC converter : DC/DC2

The oscillator can operate when CSW is “H”. When the CSW is “L” the EXT2 outputs V

DD.

The output voltage can be adjusted by R1 and R2 with FB2 of zero volt.

• VoItage Detector

DD pin can be monitored. This could be always operated with VDD.

The D

OUT pin outputs “L” when low voltage is detected with Nch open-drain output.

Page 44

RV5VH3××

CSW

FB1

EXT1

OUT

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 V

DD 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 V

DD.

The output voltage can be adjusted by R1 and R2 with FB2 of zero volt.

• VoItage Detector

DD pin can be monitored. This could be operated all the time by VDD.

The D

OUT pin outputs “L” when low voltage is detected with Nch open-drain output.

TYPICAL APPLICATION 3

Page 45

RV5VH3××

TYPICAL CHARACTERISTICS

1) Output Voltage vs. Output Current

15 10

–5

–15 –20

–10

–25

Output Current IOUT(mA)

Output Voltage VOUT(V)

01020

IN=3.6V

100

90 80 70 60 50 40 30 20

Output Current IOUT(A)

Efficiency η(%)

0.0001 0.001 0.01 0.1

IN=3.6V

±20V

±15V

±10V

VOUT±5.0V

2) Efficiency vs. Output Current

3) CSW Load Transient Responce 1

20 15

–5

–15

–10

–20

Time t(ms)

Output Voltage VOUT(V)

–50 0 50 100 150 200

IN=3.6V, IOUT=1mA

VOUT1

VOUT2

CSW

20 15

–5 –10 –15 –20

Time t(ms)

Output Voltage VOUT(V)

0 500 1000 1500

IN=3.6V, IOUT=1mA

VOUT1

CSW

OUT2

4) CSW Load Transient Responce 2

) Please refer to Typical Application.

Page 46

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

↑↑ ↑

ab c

}

Code Contents

DC/DC1 type

1 : Internal L

X 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.

Designation of Taping type Ex. E1, E2 (refer to Taping Specifications, E2 type is prescribed as a standard.)

Page 47

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.

Datasheet RV5VH101-E1, RV5VH101-E2, RV5VH102-E1, RV5VH102-E2, RV5VH201-E1 Datasheet (RICOH)

Specifications and Main Features

Frequently Asked Questions

User Manual