Innovative Power

TM

- 1 -

www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

Rev0, 13-May-08

TYPICAL APPLICATION CIRCUIT

ACT6305

Low Input High Efficiency

Synchronous Step-Up DC/DC Converter

FEATURES

− RoHS Compliant Package

APPLICATIONS

GENERAL DESCRIPTION

The ACT6305 is a high efficiency synchronous

step-up DC/DC converter that consumes just 17µA

of quiescent supply current and is capable of deliv-

ering more than 400mA output current using only

three external components. This device achieves a

typical startup voltage of just 1V, making it ideal for

applications operating from 1 or 2 alkaline cells.

This device incorporates an internal synchronous

rectifier, and achieves excellent peak efficiency of

up to 94% and features a proprietary control

scheme that ensures high efficiency over a wide

load current range.

The ACT6305 features pin-selectable output volt-

ages of 3.3V or 5V, or it can also be set externally

to any voltage between 2V and 5V. The ACT6305 is

available in a tiny SOT23-5 package.

ACT6305

C2

22µF

ENABLE

C1

22µF

L 6.8µH

LX

EN

OUT

FB

G

Pb-free

Efficiency vs. Output Current

Output Current (mA)

40

60

80

100

0.1

1.0

10

1000

30

100

50

70

90