ACT8934

® ACT8934 Product Brief, 05-Nov-10 Advanced PMU for Samsung S3C2416/S3C2450 FEATURES • Optimized for Samsung S3C2416/S3C2450 Processors GENERAL DESCRIPTION The ACT8934 is a complete, cost effective, highlyefficient ActivePMUTM power management solution, optimized for the unique power, voltagesequencing, and control requirements of the Samsung S3C2416/S3C2450 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 900mA of output current, while the third supports up to 700mA. All four lowdropout linear regulators are high-performance, low-noise, regulators that supply up to 150mA, 150mA, 250mA, and 250mA, respectively. The ACT8934 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 IC 2 TM 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, 05-Nov-10 ACT8934 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 900mA Adjustable, or 0.6V to 3.9V 700mA 900mA 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 ACT8934 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 VSYS 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.