General Description

BD8303MUV is ROHM’s high efficiency step-up/step-down switching regulator IC. It produces output of 3.3V / 5V from 1 cell of lithium battery, 4 batteries, or 2 cells of Li batteries with just one inductor.

This IC uses an original step-up/step-down drive system and provides a higher efficient power supply than conventional SEPIC-system or H-bridge system switching regulators.

Features

■ Highly-Efficient Step-Up/Step-Down DC/DC

Converter Implemented with Just One Inductor

■ Supports High-Current Applications with External

N-Channel FET

■ Incorporates a Soft-Start Function

■ Incorporates a Timer-Latch System with Short

Circuit Protection Function

Applications

General Portable Equipment

■ DVC

■ Single-Lens Reflex Cameras

■ Portable DVDs

■ Mobile PCs