R1282D002A Datasheet (RICOH electronics devices division)

R1282D002A, 2CH PWM DC/DC CONTROLLER

Pin No 1 2 3 4 5 6 7 8 9 10 Symbol EXT1 GND AMPOUT1 DTC1 VFB1 VFB2 DTC2 Vrefout VIN EXT2 Ground Pin Amplifier Output Pin of Channel 1 Maximum Duty Cycle of Channel 1 Setting Pin Feedback pin of Channel 1 Feedback pin of Channel 2 Maximum Duty Cycle of Channel 2 Setting Pin Reference Output Pin Volta

www.DataSheet4U.com 2CH PWM DC/DC CONTROLLER R1282D002A SERIES OUTLINE NO.

EA-086-0502 The R1282D002A is a CMOS-based 2-channel PWM Step-up (as Channel 1)/Step-down (as Channel 2) DC/DC converter controller.

The R1282D002A consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a reference current unit, a protection circuit, and an under voltage lockout (UVLO) circuit.

A high efficiency Step-up/Step-down DC/DC converter can be composed of this IC with

R1282D002A Features

* Input Voltage Range 2.5V to 5.5V Built-in Latch-type Protection Function by monitoring duty cycle (Fixed Delay Time Typ. 100ms) Oscillator Frequency 700kHz High Accuracy Voltage Reference ±1.5% U.V.L.O. ThresholdTyp. 2.2V (Hysteresis: Typ.