ACT8342
Rev 3, 11-Sep-09
Three Channel Integrated Power Management IC
for Handheld Portable Equipment
FEATURES
•
Multiple Patents Pending
•
Three Integrated Regulators
−
350mA PWM Step-Down DC/DC
−
80mA Low Noise LDO
−
150mA Low Noise LDO
GENERAL DESCRIPTION
The patent-pending ACT8342 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
TM
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 and REG3 are low noise, high
PSRR linear regulators that are capable of
supplying up to 80mA and 150mA, respectively.
The ACT8342 is available in a tiny 3mm
×
3mm
16-pin Thin-QFN package that is just 0.75mm thin.
•
Independent Enable/Disable Control
•
Minimal External Components
•
3×3mm, 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
Battery
nRSTO
nMSTR
nIRQ
ON1
ON2
ON3
REG1
Step-Down
DC/DC
OUT1
Adjustable, or
1.2V to 3.3V
Up to 350mA
OUT2
1.4V to 3.7V
Up to 80mA
OUT3
1.4V to 3.7V
Up to 150mA
System
Control
REG2
LDO
Pb
Pb-free
REG3
ACT8342
Active
LDO
PMU
TM
Innovative Power
TM
ActivePMU
TM
-1-
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
is a trademark of Active-Semi.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
