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ACT8780

Product Brief, 03-Feb-08

Advanced Information―All Information Subject to Change

Six Channel Integrated Power Management IC

for Handheld Portable Equipment

SYSTEM BLOCK DIAGRAM

FEATURES

− 350mA PWM Step-Down DC/DC

− 550mA PWM Step-Down DC/DC

− 550mA 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 ACT8780 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.

The ACT8780 also integrates two enable pins: ON1

controls REG1, REG2 and REG3, ON4 controls

REG4, REG5 and REG6.

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 350mA, 550mA and 550mA, re-

spectively. REG4, REG5 and REG6 are low noise,

high PSRR linear regulators that are capable of

supplying up to 250mA each.

The ACT8780 is available in a tiny 4mm x 4mm

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

OUT4

1.4V to 3.7V

Up to 250mA

OUT2

1.1V to 4.4V

Up to 550mA

OUT6

1.4V to 3.7V

Up to 250mA

OUT3

1.1V to 4.4V

Up to 550mA

ACT8780

System

Control

REG2

Step-Down

DC/DC

REG1

Step-Down

DC/DC

REG3

Step-Down

DC/DC

REG4

LDO

OUT1

1.1V to 4.4V

Up to 350mA

REG5

LDO

REG6

LDO

OUT5

1.4V to 3.7V

Up to 250mA

nIRQ

ON1

SCL

ON4

SDA

Battery

nMSTR

nRSTO

PMU

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