ACT8702 Product Brief, 09-Nov-07 Advanced Information - All Information Subject to Change Four Channel Integrated Power Management IC for Handheld Portable Equipment FEATURES GENERAL DESCRIPTION • Multiple Patents Pending • Li+ Battery Charger with Integrated MOSFET The patent-pending ACT8702 is a complete, cost effective, highly efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates 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. − 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 REG1 and REG2 are fixed-frequency, current-mode PWM step-down DC/DC converters that are optimized for high efficiency and are capable of supplying 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. • 4x4mm, Thin-QFN (TQFN44-24) Package − Only 0.75mm Height − RoHS Compliant APPLICATIONS • Portable Devices and PDAs • Digital Media Players • Battery Operated Devices The ACT8702 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thin. • GPS Receivers, etc. SYSTEM BLOCK DIAGRAM VIN CHGLEV Single Cell Li+ Battery Charger nSTAT Battery 100mA/500mA REG1 Step-Down DC/DC OUT1 1.2V to 3.3V Up to 350mA nMSTR nIRQ REG2 System Control nRSTO ON1 Step-Down DC/DC OUT2 1.2V to 3.3V Up to 550mA ON2 REG3 ACT8702 Innovative Products. Active Solutions. ActivePMUTM is a trademark of Active-Semi. Step-Up DC/DC -1- OUT3 5V www.active-semi.com Copyright © 2007 Active-Semi, Inc. ACT8702 Product Brief, 09-Nov-07 PRODUCT OPTIONS Block Function CHGR Battery Charger REG1 Step-Down DC/DC Output Voltage Capability 4.20V (4.10V to 4.30V available) 100mA/500mA 350mA 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, or 3.3V REG2 Step-Down DC/DC REG3 Step-Up DC/DC 550mA 5V 1.5W : 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 VSYS BODY AND VSYS CONTROL AC Adaptor or USB ACT8702 VIN 4.3V to 6V BAT Li+ Battery + CURRENT SENSE VINUVLO nSTAT 4.0V VOLTAGE SENSE CHARGE STATUS Charge Control OUT2 PRECONDITION 2.9V THERMAL REGULATION 110°C CHGLEV VP1 FLOAT To Battery OUT2 REG1 nRSTO SW1 OUT1 OUT1 GP12 VSYS VP2 To Battery nMSTR REG2 PUSH BUTTON OUT2 SW2 OUT2 OUT2 nIRQ GP12 System Control SW3 ON1 OUT3 REG3 ON2 GA Innovative Products. Active Solutions. To Battery OUT3 -2- GP3 GP3 www.active-semi.com Copyright © 2007 Active-Semi, Inc.