RV5VH Datasheet, PDF (2/47 Pages) RICOH electronics devices division – DC/DC CONVERTER CONTROLLER

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
• 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
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