ACT8770 Product Brief, 19-Feb-08 Advanced Information―All Information Subject to Change Six Channel Integrated Power Management IC for Handheld Portable Equipment FEATURES GENERAL DESCRIPTION • Multiple Patents Pending • Li+ Battery Charger with Integrated MOSFET The patent-pending ACT8770 is a complete, costeffective, highly efficient ActivePMUTM integrated power management solution that is ideal for a wide range of portable handheld equipment. This device integrates two PWM step-down DC/DC converters, three low dropout linear regulators (LDOs) and a full-featured linear-mode Li+ battery charger into a single, thin, space-saving package. − Auto-Select Charge Current (AC or USB) − ON/OFF Control and Status Indication • Five Integrated Regulators − 350mA PWM Step-Down DC/DC − 550mA PWM Step-Down DC/DC − 250mA High PSRR LDO − 250mA High PSRR LDO − 250mA High PSRR LDO 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 to 350mA and 550mA, respectively. The three LDOs are high PSRR linear regulators, each capable of supplying up to 250mA. The battery charger incorporates an internal power MOSFET for constant-current/constant-voltage, thermally regulated charging of a single-cell Li+ battery. • Minimal External Components • 4x4mm, Thin-QFN (TQFN44-24) Package − Only 0.75mm Height − RoHS Compliant The ACT8770 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thin. APPLICATIONS • Portable Devices and PDAs • Digital Media Players • Battery Operated Devices • GPS Receivers, etc. SYSTEM BLOCK DIAGRAM Battery Selectable up to 1A VIN ACIN CHGLEV REG1 Single Cell Li+ Battery Charger Step-Down DC/DC OUT1 0.645V to 3.3V Up to 350mA nSTAT REG2 Step-Down DC/DC nMSTR nIRQ ON1 REG3 System Control LDO OUT2 0.645V to 3.3V Up to 550mA OUT3 1.4V to 3.7V Up to 250mA ON3 REG4 ON5 LDO ACT8770 PMU REG5 TM Active Innovative Products. Active Solutions. ActivePMU TM is a trademark of Active-Semi. LDO -1- OUT4 1.4V to 3.7V Up to 250mA OUT5 1.4V to 3.7V Up to 250mA www.active-semi.com Copyright © 2008 Active-Semi, Inc. ACT8770 Product Brief, 19-Feb-08 PRODUCT OPTIONS Block Function Output Voltagec Capabilityd CHGR Battery Charger 4.20V (4.10V to 4.30V available) Selectable up to 1A REG1 Step-Down DC/DC REG2 Step-Down DC/DC REG3 LDO REG4 LDO REG5 LDO 350mA 0.645V to 3.3V 550mA 250mA 1.4V to 3.7V 250mA 250mA c: 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. d: Contact factory for additional available products or custom requirements. FUNCTIONAL BLOCK DIAGRAM VSYS BODY AND VSYS CONTROL AC Adaptor ACT8770 VIN 4.3V to 6V BAT Li+ Battery + USB CURRENT SENSE VINUVLO nSTAT 4.0V VOLTAGE SENSE PRECONDITION CHARGE STATUS 2.9V Charge Control ACIN THERMAL REGULATION 110°C VP1 To Battery OUT2 CHGLEV FLOAT REG1 SW1 OUT1 OUT1 VINUVLO GP12 VSYS VP2 nMSTR PUSH BUTTON SW2 REG2 System Control OUT2 To Battery OUT2 OUT2 nIRQ GP12 INL ON1 LDO REG3 To Battery OUT3 OUT3 ON3 LDO REG4 ON5 GA Innovative Products. Active Solutions. LDO REG5 -2- OUT4 OUT4 OUT5 OUT5 www.active-semi.com Copyright © 2008 Active-Semi, Inc.