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TM

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Copyright © 2008 Active-Semi, Inc.

ActivePMU

ACT8325

Dual PWM Step-Down DC/DCs in TDFN33

Rev0, 13-May-08

SYSTEM BLOCK DIAGRAM

FEATURES

− REG1: 350mA

− REG2: 550mA

− Reduces Input Capacitor Requirements

− Only 0.75mm Height

− RoHS-Compliant

APPLICATIONS

GENERAL DESCRIPTION

The patent-pending ACT8325 integrates two step-

down DC/DCs into a single, thin, space-saving

package to provide a cost-effective, highly-efficient

ActivePMU

device is ideal for a wide range of portable hand-

held equipment that can benefit from the advan-

tages of ActivePMU technology but do not require a

high level of integration.

REG1 and REG2 are fixed-frequency, current-mode

PWM step-down DC/DC converters that are opti-

mized for high efficiency and are capable of supply-

ing up to 350mA and 550mA, respectively. Both

outputs are available in a wide range of factory-

preset output voltage options, and an adjustable

output voltage mode is also available.

The ACT8325 is available in a tiny 3mm x 3mm

10-pin Thin-DFN package that is just 0.75mm thin.

Active-Semi

ON1

ON2

ACT8325

System

Control

REG1

Step-Down

DC/DC

REG2

Step-Down

DC/DC

Battery

OUT1

Adjustable, or

1.2V to 3.3V

Up to 350mA

OUT2

Adjustable, or

1.2V to 3.3V

Up to 550mA

TM

PMU

PMU

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