Product Brief, 10-Aug-07
Advanced Product Information–All Information Subject to Change
ACT8700
Four Channel Integrated Power Management IC
for Handheld Portable Equipment
FEATURES
Multiple Patents Pending
Li+ Battery Charger with Integrated MOSFET
ON/OFF Control and Status Indication
GENERAL DESCRIPTION
The patent-pending ACT8700 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 two step-down DC/DC converters, one step-
up DC/DC converter with over-voltage protection
(OVP) for WLED bias, and a full-featured, linear-
mode Li+ battery charger-into a single, thin, space-
saving package.
REG1 and REG2 are fixed-frequency, current-mode
PWM step-down DC/DC converters that are opti-
mized for high efficiency and are capable of supply-
ing up to 350mA and 500mA, respectively. REG3 is
a fixed-frequency, step-up DC/DC converter that
safely and efficiently biases a string of up to seven
white-LEDs for backlighting. The battery charger
incorporates an internal power MOSFET for con-
stant-current/constant-voltage, thermally regulated
charging of a single-cell Li+ battery.
The ACT8700 is available in a tiny 4mm x 4mm
24-pin Thin-QFN package that is just 0.75mm thin.
Three Integrated Regulators
350mA PWM Step-Down DC/DC
500mA PWM Step-Down DC/DC
Step-Up DC/DC with OVP for WLED Bias
Minimal External Components
4x4mm, Thin-QFN (TQFN44-24) Package
Only 0.75mm Height
RoHS Compliant
APPLICATIONS
Portable Devices and PDAs
Digital Media Players
Battery Operated Devices
GPS Receivers, etc.
SYSTEM BLOCK DIAGRAM
Innovative Products.
Active Solutions.
ActivePMU
TM
is a trademark of Active-Semi.
-1-
Copyright © 2007 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
