RN5RY251A Ver la hoja de datos (PDF) - RICOH Co.,Ltd.

Número de pieza

componentes Descripción

Fabricante

RN5RY251A

VFM STEP-UP DC/DC CONVERTER CONTROLLER

RICOH Co.,Ltd. 

VFM STEP-UP DC/DC

CONVERTER CONTROLLER

RN5RY ××1 SERIES

OUTLINE

The RN5RY××1 Series are VFM Control ICs for step-up DC/DC converter with an external driver transistor

featuring high output voltage accuracy and low supply current by CMOS process. Each of the RN5RY××1 Series

ICs consists of a voltage reference unit, an error amplifier, an oscillator, a VFM control circuit and feed back resis-

tors. A low ripple, high efficiency step-up DC/DC converter can be composed of the RN5RY××1 Series with only

an inductor, a diode, a capacitor, and a drive transistor.

Since the package for these ICs are SOT-23-5( Mini-mold)package, high density mounting of the ICs on boards

is possible.

FEATURES

• Low Supply Current ..................................................................................TYP. 3µA

• Low Standby Current ..................................................................................TYP. 0.6µA

• Low Temperature-Drift Coefficient of Output Voltage ...........................TYP. ±50ppm / ˚C

• High Accuracy Output Voltage ...................................................................±2.5%

• Low Oscillation Start-up Voltage ...............................................................MAX. 0.8V

• Small Package .............................................................................................SOT-23-5(Mini-Mold)

APPLICATIONS

• Power source for battery-powered instruments.

• Power source for cameras, VCRs, camcorders, pagers, and other hand-held communication instruments.

BLOCK DIAGRAM

CE

5

EXT

3

OSC

Output

Buffer

VOUT

2

Vref

GND

1

1

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