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Copyright © 2011 Active-Semi, Inc.

Innovative Power

TM

TYPICAL APPLICATION CIRCUIT

ACT4070

Rev 2, 16-Sep-11

Wide Input 3A Step Down Converter

FEATURES

Including Low ESR Ceramic Capacitors

APPLICATIONS

GENERAL DESCRIPTION

The ACT4070 is a current-mode step-down DC/DC

converter that generates up to 3A output current at

400kHz switching frequency. The device utilizes

Active-Semi’s proprietary ISOBCD30 process for

operation with input voltage up to 30V.

Consuming only 6μA in shutdown mode, the

ACT4070 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 ACT4070 is available in SOP-8/EP exposed

pad package and requires very few external de-

vices for operation.

NOTE:

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Refer to the last page (Page11) for the End of

Life Notice of the Part Number.