General Description

ROHM’s highly-efficient buck-boost converter BD8306MUV produces buck-boost output voltage including 3.3 V from two-cell or three-cell alkaline battery, or one-cell lithium-ion battery with just one inductor. This IC adopts the original buck-boost drive system and creates a more efficient power supply than the conventional SEPIC-system or H-bridge system switching regulators.

Features

■ Highly-Efficient Buck-Boost DC/DC Converter

Constructed with just one Inductor.

■ Maximum output current changes depending on the

input and output voltages. Input current for PVCC

terminal should be less than 2.0A including the DC

current and ripple current of the inductor. Please

refer to Figure 25 and Figure 34 for details about

the maximum output current at 3.3V and 5.0V

output.

■ Incorporates a Soft-Start Function.

■ Incorporates a Timer Latch System with Short

Protection Function.

Application

■ General Portable Equipment

■ DSC

■ DVC

■ Cellular Phone

■ PDA

■ LED