ACT8938 ® Product Brief, 09-Nov-10 Advanced PMU for Marvell Aspen FEATURES GENERAL DESCRIPTION • • • • • • • • The ACT8938 is a complete, cost effective, highly efficient ActivePMUTM power management solution, optimized for the unique power, voltage sequencing, and control requirements of the Marvell Aspen processor. Optimized for Marvell Aspen Processors Three Step-Down DC/DC Converters Four Low-Dropout Linear Regulators Integrated ActivePathTM Charger I2CTM Serial Interface This device features three step-down DC/DC converters and four low-noise, low-dropout linear regulators, along with a complete battery charging solution featuring the advanced ActivePathTM system-power selection function. Advanced Enable/Disable Sequencing Controller Minimal External Components Tiny 5×5mm TQFN55-40 Package − 0.75mm Package Height − Pb-Free and RoHS Compliant The three DC/DC converters utilize a high efficiency, fixed-frequency (2MHz), current-mode PWM control architecture that requires a minimum number of external components. Two DC/DCs are capable of supplying up to 1150mA of output current, while the third supports up to 1300mA. All four low-dropout linear regulators are highperformance, low-noise, regulators that supply up to 150mA, 150mA, 320mA and 320mA respectively. APPLICATIONS • • • • • Personal Navigation Devices Portable Media Players Tablet Devices Smart Phones The ACT8938 is available in a compact, Pb-Free and RoHS-compliant TQFN55-40 package . MIDs TYPICAL APPLICATION DIAGRAM Innovative PowerTM ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. -1- www.active-semi.com Copyright © 2010 Active-Semi, Inc. ACT8938 Active-Semi Product Brief, 09-Nov-10 PRODUCT OPTIONS Block Function Output Voltage Capability ActivePath System Power Selection 4.6V Up to 2A CHGR Battery Charger 4.2V Programmable up to 1A REG1 Step-Down DC/DC REG2 Step-Down DC/DC REG3 Step-Down DC/DC 1300mA REG4 LDO 150mA REG5 LDO REG6 LDO REG7 LDO 1150mA Adjustable, or 0.6V to 3.9V 1150mA 150mA 0.6V to 3.9V 320mA 320mA FUNCTIONAL BLOCK DIAGRAM (Optional) AC Adaptor BODY SWITCH ACT8938 4.35V to 6V CHGIN VSYS System Supply BAT Li+ Battery USB ACIN BODY SWITCH ActivePath Control VSYS nSTAT + 102µA CURRENT SENSE CHARGE STATUS TH VOLTAGE SENSE Charge Control CHGLEV PRECONDITION 2.85V VP1 ISET To VSYS THERMAL REGULATION OUT2 110°C SW1 OUT1 nRSTO OUT1 VSYS GP12 nPBIN PUSH BUTTON VP2 OUT2 To VSYS SW2 nPBSTAT OUT2 OUT2 OUT2 GP12 nIRQ VP3 To VSYS SW3 PWRHLD OUT3 OUT3 System Control PWREN GP3 VSEL INL To VSYS SCL REG4 LDO SDA BAT LBI REG5 LDO 1.2V VSYS OUT4 OUT4 OUT5 OUT5 + REG6 LDO nLBO REG7 LDO OUT6 OUT6 OUT7 OUT7 REFBP Reference GA Innovative PowerTM -2- EP www.active-semi.com Copyright © 2010 Active-Semi, Inc.