Product Brief, 29-Feb-08
Advanced Information―All Information Subject to Change
ACT8342
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 man-
agement solution that is ideal for a wide range of
portable handheld equipment. This device inte-
grates 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 avail-
able. REG2, 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
REG1
Battery
nRSTO
nMSTR
nIRQ
ON1
ON2
ON3
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
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 ]
