ACT8939 Product Brief, 15-Aug-13 Advanced PMU for Freescale i.MX53 Processor Freescale i.MX53 processor. It is ideal for a wide range of high performance portable handheld applications such as tablet or pad devices. This device integrates the ActivePathTM complete battery charging and management system with seven power supply channels. FEATURES • • • • • • • 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 highefficiency, 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 320mA of output current. GENERAL DESCRIPTION The ACT8939 is available in a compact, Pb-Free and RoHS-compliant TQFN55-40 package. The ACT8939 is a complete, cost effective, highlyefficient ActivePMUTM power management solution, optimized for the unique power, voltagesequencing, and control requirements of the 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 © 2013 Active-Semi, Inc. ACT8939 Product Brief, 15-Aug-13 PRODUCT OPTIONS Block Function Output Voltage Capability REG1 Step-Down DC/DC 0.6V to 3.9V 1150mA REG2 Step-Down DC/DC 0.6V to 3.9V 1150mA REG3 Step-Down DC/DC 0.6V to 3.9V 1300mA REG4 LDO 0.6V to 3.9V 320mA REG5 LDO 0.6V to 3.9V 320mA REG6 LDO 0.6V to 3.9V 320mA REG7 LDO 0.6V to 3.9V 320mA FUNCTIONAL BLOCK DIAGRAM (Optional) BODY SWITCH ACT8939 4.35V to 6V CHGIN AC Adaptor 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 OUT7 110°C SW1 OUT1 nRSTO OUT1 VSYS GP12 nPBIN PUSH BUTTON VP2 OUT7 To VSYS SW2 nPBSTAT OUT2 OUT2 OUT7 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 ActivePMUTM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. -2- EP www.active-semi.com Copyright © 2013 Active-Semi, Inc.