Product Brief, 05-May-09
Advanced Information¯All Information Subject to Change
ACT8352
Four-Channel Integrated Power Management IC for
Handheld Portable Equipment
FEATURES
Four Integrated Regulators
350mA PWM Step-Down DC/DC
80mA Low Noise LDO
150mA Low Noise LDO
300mA Low Noise LDO
The patent-pending ACT8352 is a complete, cost
effective, highly-efficient
ActivePMU
TM
power
management solution that is ideal for a wide range
of portable handheld equipment. This device
integrates one PWM step-down DC/DC converter
and two low noise, low dropout linear regulators
(LDOs) in a single, thin, space-saving package.
This device is ideal for a wide range of portable
handheld equipment that can benefit from the
advantages of
ActivePMU
technology but does not
require a high level of integration.
REG1 is a fixed-frequency, current-mode PWM
step-down DC/DC converter that is optimized for
high efficiency and is capable of supplying up to
350mA output current. REG1’s output is available in
a variety of factory-preset output voltage options,
and an adjustable output voltage mode is also
available. REG2, REG3, and REG4 are low noise,
high PSRR linear regulators that are capable of
supplying up to 80mA, 150mA, and 300mA,
respectively. Finally, an I
2
C serial interface provides
programmability for the DC/DC converters and
LDOs.
The ACT8352 is available in a tiny 3mm
3mm
16-pin Thin-QFN package that is just 0.75mm thin.
GENERAL DESCRIPTION
Independent Enable/Disable Control
I
2
C
TM
Compatible Serial Interface
Programmable Output Voltages
Configurable Operating Modes
Minimal External Components
33mm, Thin-QFN (TQFN33-16) Package
Only 0.75mm Height
RoHS Compliant
APPLICATIONS
Portable Devices and PDAs
MP3/MP4 Players
Wireless Handhelds
GPS Receivers, etc.
SYSTEM BLOCK DIAGRAM
REG1
Battery
Step-Down
DC/DC
nRSTO
nPBIN
OUT1
0.6V to 3.9V
Up to 350mA
REG2
nIRQ
System
Control
LDO
PWRHLD
SCL
OUT2
0.6V to 3.9V
Up to 80mA
REG3
LDO
SDA
OUT3
0.6V to 3.9V
Up to 150mA
ACT8352
REG4
TM
LDO
Active
PMU
OUT4
0.9V to 3.9V
Up to 300mA
Innovative Power
TM
-1-
ActivePMU
TM
is a trademark of Active-Semi.
www.active-semi.com
Copyright © 2009 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
