ACT8702 View Datasheet(PDF) - Active-Semi, Inc
Part Name
Description
Manufacturer
ACT8702 Datasheet PDF : 2 Pages
| |||
ACT8702
Product Brief, 09-Nov-07
Advanced Information - All Information Subject to Change
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
− 350mA Step-Down DC/DC
− 550mA Step-Down DC/DC
− 5V Step-Up DC/DC
• 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.
GENERAL DESCRIPTION
The patent-pending ACT8702 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 two PWM step-down DC/DC converters, one
PWM step-up DC/DC converter 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 550mA, respectively. REG3 is
a fixed-frequency, step-up DC/DC converter that
generates 5V for wide variety of regulated-voltage
applications such as audio, motor, or USB power.
The battery charger incorporates an internal power
MOSFET for constant-current/constant-voltage,
thermally regulated charging of a single-cell Li+
battery.
The ACT8702 is available in a tiny 4mm x 4mm
24-pin Thin-QFN package that is just 0.75mm thin.
SYSTEM BLOCK DIAGRAM
VIN
CHGLEV
nSTAT
nMSTR
nIRQ
nRSTO
ON1
ON2
Single Cell
Li+ Battery
Charger
System
Control
ACT8702
REG1
Step-Down
DC/DC
REG2
Step-Down
DC/DC
REG3
Step-Up
DC/DC
Battery
100mA/500mA
OUT1
1.2V to 3.3V
Up to 350mA
OUT2
1.2V to 3.3V
Up to 550mA
OUT3
5V
Innovative Products. Active Solutions.
-1-
ActivePMUTM is a trademark of Active-Semi.
www.active-semi.com
Copyright © 2007 Active-Semi, Inc.
Share Link: 