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Copyright © 2012 Active-Semi, Inc.

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Capacitors

Current

Short Circuit

APPLICATIONS

GENERAL DESCRIPTION

ACT2113 is a monolithic synchronous buck

regulator.

The

device

integrates

two

85mΩ

MOSFETs, and provides 3A of continuous load

current over a wide input voltage of 4.5V to 18V.

Current mode control provides fast transient

response and cycle-by-cycle current limit. Hiccup at

short circuit reduces IC temperatures.

An internal soft-start prevents inrush current at turn-

on, and in shutdown mode the supply current drops

to 10μA. Pulse-skipping mode at light load reduces

standby power down to 3mA.

This device, available in an 8-pin SOP-8EP

package, provides a very compact solution with

minimal external components.

ACT2113

18V/3A Step-Down DC/DC Converter

Rev 3, 23-May-12

®

Load Current (mA)

10

100

1000

10000

Efficiency vs. Load Current

100

90

80

70

60

50

40

30