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Copyright © 2007 Active-Semi, Inc.

TYPICAL APPLICATION CIRCUIT

ACT4075

Rev PrA, 13-Aug-07

Advanced Product Information – All Information Subject to Change

Wide Input 2.5A Step Down Converter

FEATURES

Including Low ESR Ceramic Capacitors

APPLICATIONS

GENERAL DESCRIPTION

The ACT4075 is a current-mode step-down DC/DC

converter that generates up to 2.5A output current

at 410kHz switching frequency. The device utilizes

Active-Semi’s proprietary ISOBCD30 process for

operation with input voltage up to 32V.

Consuming only 6μA in shutdown mode, the

ACT4075 is highly efficient with peak efficiency at

95% when in operation. Protection features include

cycle-by-cycle current limit, thermal shutdown, and

frequency fold back at short circuit. The device also

includes an internal soft start function to prevent

overshoot.

The ACT4075 is available in SOP-8/EP exposed

pad package and requires very few external de-

vices for operation.