Innovative Power

TM

- 1 -

www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

ActivePMU

ACT8342

Three-Channel Integrated Power Management IC for

Handheld Portable Equipment

SYSTEM BLOCK DIAGRAM

Product Brief, 29-Feb-08

Advanced Information―All Information Subject to Change

OUT1

Adjustable, or

1.2V to 3.3V

Up to 350mA

OUT2

1.4V to 3.7V

Up to 80mA

OUT3

1.4V to 3.7V

Up to 150mA

ON2

ON3

System

Control

REG3

LDO

REG2

LDO

Battery

REG1

Step-Down

DC/DC

ACT8342

TM

PMU

PMU

Active

nIRQ

nMSTR

nRSTO

ON1

FEATURES

− 350mA PWM Step-Down DC/DC

− 80mA Low Noise LDO

− 150mA Low Noise LDO

− Only 0.75mm Height

− RoHS Compliant

APPLICATIONS

GENERAL DESCRIPTION

The patent-pending ACT8342 is a complete, cost

agement solution that is ideal for a wide range of

portable handheld equipment. This device inte-

grates one PWM step-down DC/DC converter and

two low noise, low dropout linear regulators (LDOs)

in a single, thin, space-saving package. This device

is ideal for a wide range of portable handheld

equipment that can benefit from the advantages of

ActivePMU

technology but does not require a high

level of integration.

REG1 is a fixed-frequency, current-mode PWM

step-down DC/DC converter that is optimized for

high efficiency and is capable of supplying up to

350mA output current. REG1’s output is available in

a variety of factory-preset output voltage options,

and an adjustable output voltage mode is also avail-

able. REG2, REG3 are low noise, high PSRR linear

regulators that are capable of supplying up to

80mA, and 150mA, respectively.

The ACT8342 is available in a tiny 3mm

× 3mm

16-pin Thin-QFN package that is just 0.75mm thin.