ACT8937

® ACT8937 Product Brief, 09-Nov-10 Advanced PMU for Samsung S5PC100, S5PC110 and S5PV210 Processors FEATURES • Optimized for Samsung S5PC100, S5PC110 and S5PV210 Processors GENERAL DESCRIPTION The ACT8937 is a complete, cost effective, highlyefficient ActivePMUTM power management solution, optimized for the unique power, voltagesequencing, and control requirements of the Samsung S5PC100, S5PC110 and S5PV210 processors. 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. 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 1100mA of output current, while the third supports up to 1200mA. All four low-dropout linear regulators are highperformance, low-noise, regulators that supply up to 150mA, 150mA, 250mA, and 250mA, respectively. The ACT8937 is available in a compact, Pb-Free and RoHS-compliant TQFN55-40 package. • • • • • • • Three Step-Down DC/DC Converters Four Low-Dropout Linear Regulators Integrated ActivePathTM Charger I2CTM Serial Interface Advanced Enable/Disable Sequencing Controller Minimal External Components Tiny 5×5mm TQFN55-40 Package − 0.75mm Package Height − Pb-Free and RoHS Compliant APPLICATIONS • • • • • Personal Navigation Devices Portable Media Players Tablet Devices Smart Phones 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. ® Product Brief, 09-Nov-10 ACT8937 Up to 2A PRODUCT OPTIONS Block ActivePath CHGR REG1 REG2 REG3 REG4 REG5 REG6 REG7 Function System Power Selection Battery Charger Step-Down DC/DC Step-Down DC/DC Step-Down DC/DC LDO LDO LDO LDO Output Voltage 4.6V 4.2V Capability Programmable up to 1A 1100mA Adjustable, or 0.6V to 3.9V 1100mA 1200mA 150mA 0.6V to 3.9V 150mA 250mA 250mA FUNCTIONAL BLOCK DIAGRAM (Optional) AC Adaptor USB ACIN BODY SWITCH BODY SWITCH 4.35V to 6V CHGIN ACT8937 VSYS System Supply VSYS ActivePath Control BAT Li+ Battery nSTAT CHARGE STATUS CURRENT SENSE 102µA + TH VOLTAGE SENSE CHGLEV Charge Control PRECONDITION 2.85V VP1 THERMAL REGULATION ISET OUT1 nRSTO To VSYS 110°C SW1 OUT1 OUT1 VSYS nPBIN PUSH BUTTON OUT1 nPBSTAT GP12 VP2 To VSYS SW2 OUT2 OUT2 OUT1 GP12 nIRQ VP3 To VSYS SW3 PWRHLD PWREN VSEL INL To VSYS SCL BAT SDA LBI OUT1 nLBO 1.2V + REG6 LDO REG7 LDO REFBP Reference OUT3 System Control OUT3 GP3 REG4 LDO REG5 LDO OUT4 OUT4 OUT5 OUT5 OUT6 OUT6 OUT7 OUT7 GA EP Innovative PowerTM -2- www.active-semi.com Copyright © 2010 Active-Semi, Inc.