Innovative Products. Active Solutions. - 1 - www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
ActivePMUTM is a trademark of Active-Semi.
I2CTM is a trademark of Philips Electronics.
Product Brief, 03-Feb-08
Advanced Information―All Information Subject to Change
ACT8710
Four Channel Integrated Power Management IC
for Handheld Portable Equipment
SYSTEM BLOCK DIAGRAM
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
− Step-Up DC/DC with OVP for WLED Bias
• I2CTM Compatible Serial Interface
− Programmable Output Voltages
− Configurable Operating Modes
• 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 ACT8710 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 with over-voltage
protection (OVP) and a full-featured linear-mode Li+
battery charger into a single, thin, space-saving
package. An I2C Serial Interface provides program-
mability for the DC/DC converters and battery
charger.
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 PWM step-up 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. All DC/DC con-
verters’ output voltage are programmable and con-
trollable via the I2C interface.
The ACT8710 is available in a tiny 4mm x 4mm
24-pin Thin-QFN package that is just 0.75mm thin.
nRSTO OUT2
1.1V to 4.4V
Up to 550mA
ON1
VIN
nMSTR
CHGLEV Battery
Programmable
Up to 1A
OUT3
WLED Bias
nIRQ
OUT1
1.1V to 4.4V
Up to 350mA
ON2
nSTAT
ACT8710 REG3
Step-Up
DC/DC
Single Cell
Li+ Batter y
Charger
System
Control REG2
Step-Down
DC/DC
REG1
Step-Down
DC/DC
SCL
SDA
PMUPMU TM
Active
ACT8710
Innovative Products. Active Solutions. - 2 - www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
Product Brief, 03-Feb-08
PRODUCT OPTIONS
: Output voltage options detailed in this table represent standard voltage options, and are available for samples or production orders.
Contact Active-Semi for more information regarding semi-custom output voltage combinations.
: Contact factory for additional available products or custom requirements.
FUNCTIONAL BLOCK DIAGRAM
REG1
Charge
Control
REG2
VP1
VP2
GP12
GP12
REG3
SW2
SW1
ON1
nMSTR
PUSH
BUTTON
nIRQ
ON2
VSYS
VIN BAT
CHGLEV
2.9V
PRE-
CONDITION
CURRENT
SENSE
VOLTAGE
SENSE
OUT2
OUT1
110°C
THERMAL
REGULATION
VIN
FLOAT
OUT2
4.0V
VINUVLO
4.3V to 6V
OUT2
OUT1
VSYS
BODY AND
VSYS
CONTROL
GP3
SW3 To Battery
OUT3
FB3
OVP3
ACT8710
Serial
Interface
SDA
SCL
nRSTO
OUT2
System
Control
GA
To Battery
AC Adaptor
or USB +
Li+ Battery
To Battery
Block Function Output Voltage Capability
CHGR Battery Charger 4.20V (4.10V to 4.40V available) Programmable up to 1A
REG1 Step-Down DC/DC
Programmable 1.1V to 4.4V
350mA
REG2 Step-Down DC/DC 550mA
REG3 Step-Up DC/DC Programmable up to 27.5V Up to 7 WLEDs
A
ctive-Semi
