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www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

Rev PrB, 20-Feb-08

Preliminary Product Information―All Information Subject to Change

TYPICAL APPLICATION CIRCUIT

ACT6308

Low Input High Efficiency

Synchronous Step-Up DC/DC Converter

FEATURES

− RoHS Compliant Package

APPLICATIONS

GENERAL DESCRIPTION

The ACT6308 is a high efficiency synchronous

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

of quiescent supply current using only three exter-

nal components. This device achieves a typical

startup voltage of just 1V, making it ideal for appli-

cations operating from 1 or 2 alkaline cells.

This device incorporates an internal synchronous

rectifier, and achieves excellent peak efficiency of

up to 89% and features a proprietary control

scheme that ensures high efficiency over a wide

load current range.

The ACT6308 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 ACT6308 is

available in a tiny SOT23-5 package.

ACT6308

C2

4.7µF

ENABLE

C1

2.2µF

L 2.2µH

LX

EN

OUT

FB

G

3.3V

Pb-free

Efficiency vs. Output Current

Output Current (mA)

0.60

1.00

0.1

1.0

10

1000

0.50

100

0.70

0.80

0.90

FB = GND