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I

ACT8798

Product Brief, 31-Jan-08

Advanced Information―All Information Subject to Change

Six Channel Integrated Power Management IC

for Handheld Portable Equipment

SYSTEM BLOCK DIAGRAM

FEATURES

− 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

− Programmable Output Voltages

− Configurable Operating Modes

− Only 0.75mm Height

− RoHS Compliant

APPLICATIONS

GENERAL DESCRIPTION

The patent-pending ACT8798 is a complete, cost-

agement solution that is ideal for a wide range of

portable handheld equipment. This device inte-

grates three step-down DC/DC converters and

three low dropout linear regulators (LDOs) into a

Interface provides programmability for the DC/DC

converters and LDOs.

REG1, REG2 and REG3 are fixed-frequency, cur-

rent-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, respec-

tively. REG4, REG5 and REG6 are low noise, high

PSRR linear regulators that are capable of supply-

ing up to 250mA each.

The ACT8798 is available in a tiny 4mm x 4mm

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

ACT8798

System

Control

REG2

Step-Down

DC/DC

REG1

Step-Down

DC/DC

REG3

Step-Down

DC/DC

REG4

LDO

REG5

LDO

REG6

LDO

nRSTO

PWRHLD

SCL

SDA

Battery

nMSTR

OUT4

0.645V to 3.7V

Up to 250mA

OUT2

1.1V to 4.4V

Up to 1.2A

OUT6

1.4V to 3.7V

Up to 250mA

OUT3

1.1V to 4.4V

Up to 750mA

OUT1

1.1V to 4.4V

Up to 1.2A

OUT5

1.4V to 3.7V

Up to 250mA

ON3

TM

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