ACT8798 View Datasheet(PDF) - Active-Semi, Inc

Part Name

Description

Manufacturer

ACT8798

Six Channel Integrated Power Management IC for Handheld Portable Equipment

Active-Semi, Inc 

ACT8798

Rev 1, 16-Nov-09

Six Channel Integrated Power Management IC

for Handheld Portable Equipment

FEATURES

• Multiple Patents Pending

• Six Integrated Regulators

− 1.2A PWM Step-Down DC/DC

− 1.2A PWM Step-Down DC/DC

− 750mA PWM Step-Down DC/DC

− 250mA Low Noise LDO

− 250mA Low Noise LDO

− 250mA Low Noise LDO

• I2CTM Compatible Serial Interface

− Programmable Output Voltages

− Configurable Operating Modes

• Minimal External Components

• 4x4mm, Thin-QFN (TQFN44-24) Package

− Only 0.75mm Height

− RoHS Compliant

APPLICATIONS

• Portable Devices and PDAs

• Wireless Handhelds

• DMB Enabled Devices

• GPS Receivers, etc.

GENERAL DESCRIPTION

The patent-pending ACT8798 is a complete, cost-

effective, highly-efficient ActivePMUTM power

management solution that is ideal for a wide range

of portable handheld equipment. This device

integrates three step-down DC/DC converters and

three low dropout linear regulators (LDOs) into a

single, thin, space-saving package. An I2C Serial

Interface provides programmability for the DC/DC

converters and LDOs.

REG1, REG2 and REG3 are fixed-frequency,

current-mode PWM step-down DC/DC converters

that are optimized for high efficiency and are

capable of supplying up to 1.2A, 1.2A and 750mA,

respectively. REG4, REG5 and REG6 are low

noise, high PSRR linear regulators that are capable

of supplying up to 250mA each.

The ACT8798 is available in a tiny 4mm × 4mm 24-

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

SYSTEM BLOCK DIAGRAM

Battery

nMSTR

nRSTO

PWRHLD

ON3

SCL

SDA

OUT1

1.1V to 4.4V

Up to 1.2A

System

Control

REG1

Step-Down

DC/DC

ACT8798

ActivePMU TM

REG2

Step-Down

DC/DC

REG3

Step-Down

DC/DC

REG4

LDO

REG5

LDO

REG6

LDO

Innovative PowerTM

-1-

ActivePMUTM is a trademark of Active-Semi.

I2CTM is a trademark of Philips Electronics.

OUT2

1.1V to 4.4V

Up to 1.2A

OUT3

1.1V to 4.4V

Up to 750mA

OUT4

0.645V to 3.7V

Up to 250mA

OUT5

1.4V to 3.7V

Up to 250mA

OUT6

1.4V to 3.7V

Up to 250mA

Pb-free

www.active-semi.com

Copyright © 2009 Active-Semi, Inc.

Share Link: