Three Channel Integrated Power Management IC
for Handheld Portable Equipment
• Multiple Patents Pending
• Three Integrated Regulators
− 350mA PWM Step-Down DC/DC
− 80mA Low Noise LDO
− 150mA Low Noise LDO
• Independent Enable/Disable Control
• Minimal External Components
• 3×3mm, Thin-QFN (TQFN33-16) Package
− Only 0.75mm Height
− RoHS Compliant
• Portable Devices and PDAs
• MP3/MP4 Players
• Wireless Handhelds
• GPS Receivers, etc.
The patent-pending ACT8342 is a complete, cost
effective, highly-efficient ActivePMUTM 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.
www.DaStaSYheSetT4UE.cMom BLOCK DIAGRAM
1.2V to 3.3V
Up to 350mA
1.4V to 3.7V
Up to 80mA
1.4V to 3.7V
Up to 150mA
ActivePMUTM is a trademark of Active-Semi.
Copyright © 2008 Active-Semi, Inc.