Product Brief, 09-Nov-07
Advanced Information - All Information Subject to Change
ACT8706
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
•
Three Integrated Regulators
−
550mA PWM Step-Down DC/DC
−
750mA PWM Step-Down DC/DC
−
Step-Up DC/DC with OVP for WLED Bias
GENERAL DESCRIPTION
The patent-pending ACT8706 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 for proces-
sor core and I/O power, one step-up DC/DC con-
verter with over-voltage protection (OVP) and a full-
featured, linear-mode Li+ battery charger into a sin-
gle, 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 550mA and 750mA, 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
constant-current/constant-voltage, thermally regu-
lated charging of a single-cell Li+ battery.
The ACT8706 is available in a tiny 4mm x 4mm
24-pin Thin-QFN package that is just 0.75mm thin.
•
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-
www.active-semi.com
Copyright © 2007 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
