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ActivePMU

ACT8750

Product Brief, 09-Nov-07

Advanced Information - All Information Subject to Change

SYSTEM BLOCK DIAGRAM

FEATURES

APPLICATIONS

GENERAL DESCRIPTION

The patent-pending ACT8750 is a complete, cost-

effective, highly-efficient ActivePMU

agement solution that is ideal for a wide range of

portable handheld equipment. This device inte-

grates two PWM step-down DC/DC converters, one

step-up DC/DC converter with over-voltage protec-

tion (OVP) for WLED bias, and three low dropout

linear regulators (LDOs) into a single, thin, space-

saving package.

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. REG3 is

a fixed-frequency, step-up DC/DC converter that

safely and efficiently biases a string of up to seven

white-LEDs for backlighting applications. The three

LDOs are low noise, high PSRR linear regulators

capable of supplying up to 150mA each.

The ACT8750 is available in a tiny 4mm x 4mm

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

Six Channel Integrated Power Management IC

for Handheld Portable Equipment