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R5220x

RICOH electronics devices division
Part Number R5220x
Manufacturer RICOH electronics devices division
Description PWM Step-down DC/DC Converter
Published Apr 12, 2010
Detailed Description www.DataSheet4U.com R5220x SERIES PWM Step-down DC/DC Converter with switch function NO.EA-121-070824 OUTLINE The R522...
Datasheet PDF File R5220x PDF File

R5220x
R5220x

Overview
www.
DataSheet4U.
com R5220x SERIES PWM Step-down DC/DC Converter with switch function NO.
EA-121-070824 OUTLINE The R5220x Series are CMOS-based PWM step-down DC/DC Converters with synchronous rectifier, low supply current and LDO mode.
DC/DC converter of the R5220x consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, protection circuits, a protection against miss operation under low voltage (UVLO), PWM-DC to DC converter / LDO alternative circuit, a chip enable circuit, and a driver transistor.
A high efficiency step-down DC/DC converter can be easily composed of this IC with only a few kinds of external components, or an inductor and capacitors.
LDO of the R5220x consists of a vortage reference unit, an error amplifier, resistors for voltage setting, output current limit circuit, a driver transistor, and so on.
The output voltage is fixed internally in the R5220x.
The output voltage of the DC/DC converter and the LDO ca...


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