ACT8342
Rev0, 26-May-08
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
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 ]
