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DC/DC CONVERTER CONTROLLER
RV5VH SERIES
OUTLINE
The RV5VH series are dual output CMOS DC/DC converter ICs integrating Step-up and inverting DC/DC converters.
The RV5VH3
×× series ICs consist of an oscillator, two VFM control circuits, control transistors(EXT switches), a phase
shift circuit, a voltage reference unit, an error amplifier, and voltage sensing resistors. The RV5VH series are housed in 8pin
SSOP(0.65mm pitch) and suitable for two supply systems such as pager, PDA, which need power supplies for LCD.
RV5VH1
×× and RV5VH2×× series are able to provide two DC/DC converter systems, one system is step-up converter
with internally fixed output and another is inverting converter system with user adjustable output by external resistors. A
voltage detector with sensing pin is also included. RV5VH3
×× series are able to provide two DC/DC converter systems,
both of boost converter, DC/DC1, and inverting one, DC/DC2, can operate with external transistors being adjustable out-
put by resistors. Further more reset output is available.
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 system
• Power source for portable data processing system, e.g. PDA, Electronic Data Banks
• Power source for Audio-Visual system, e.g. CD player, Video camera
• Power source for Notebook PC, Word processing system
• Gadget being needed two power supplies, e.g. CPU and LCD