Innovative Power

TM

- 1 -

www.active-semi.com

Copyright © 2012 Active-Semi, Inc.

TYPICAL APPLICATION CIRCUIT

ACT4070B

Rev 0, 23-Apr-12

Wide Input 3A Step Down Converter

FEATURES

APPLICATIONS

GENERAL DESCRIPTION

ACT4070B is a wide input voltage step-down

DC/DC converter that provides up to 3A output cur-

rent at 300kHz switching frequency. ACT4070B is a

replacement part for ACT4070 with advanced fea-

tures such as lower standby current and higher light

load efficiency. ACT4070B can be dropped into

ACT4070 socket with only feedback resistance

value changed.

ACT4070B’s protection features include Cycle-by-

Cycle current limit, thermal shutdown, and fre-

quency foldback at over current and short circuit.

The devices are available in a SOP-8EP package

and require very few external devices for operation.

NOTE:

∗

ACT4070B

is

the

replacement

part

for

ACT4070.

Load Current (mA)

10

100

1000

10000

1

100

80

60

40

20

0

Efficiency vs. Load Current