Innovative Power

TM

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Copyright © 2010 Active-Semi, Inc.

ActivePMU

I

Product Brief, 05-Nov-10

ACT8935

TYPICAL APPLICATION DIAGRAM

Advanced PMU for SiRF Prima

FEATURES

− 0.75mm Package Height

− Pb-Free and RoHS Compliant

APPLICATIONS

GENERAL DESCRIPTION

The ACT8935 is a complete, cost effective, highly-

efficient ActivePMU

optimized

for

the

unique

power,

voltage-

sequencing, and control requirements of the SiRF

Prima

This device features three step-down DC/DC

converters and four low-noise, low-dropout linear

regulators, along with a complete battery charging

solution

featuring

the

advanced

ActivePath

TM

system-power selection function.

The

three

DC/DC

converters

utilize

a

high-

efficiency, fixed-frequency (2MHz), current-mode

PWM control architecture that requires a minimum

number of external components. Two DC/DCs are

capable of supplying up to 900mA of output current,

while the third supports up to 700mA. All four low-

dropout linear regulators are high-performance,

low-noise, regulators that each supply up to 150mA.

The ACT8935 is available in a compact, Pb-Free

and RoHS-compliant TQFN55-40 package.

®