ACT8891 ® Product Brief, 05-Dec-11 Advanced PMU for Rockchip RK2918 Processor FEATURES GENERAL DESCRIPTION • • • • • • • The ACT8891 is a complete, cost effective, highlyefficient ActivePMUTM power management solution, optimized for the unique power, voltagesequencing, and control requirements of the Rockchip RK2918 processor. Optimized for Rockchip RK2918 Processor Three Step-Down DC/DC Converters Four Low-Dropout Linear Regulators I2CTM Serial Interface This device features three step-down DC/DC converters and four low-noise, low-dropout linear regulators. Advanced Enable/Disable Sequencing Controller Minimal External Components Tiny 4×4mm TQFN44-32 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 support up to 320mA. The ACT8891 is available in a compact, Pb-Free and RoHS-compliant TQFN44-32 package. SYSTEM BLOCK DIAGRAM Innovative PowerTM ActivePMUTM is a trademark of Active-Semi. I2CTM is a trademark of NXP. -1- www.active-semi.com Copyright © 2011 Active-Semi, Inc. ACT8891 ® Product Brief, 05-Dec-11 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 Active-Semi VP1 To Battery ACT8891 SW1 OUT1 VDDREF OUT1 nPBIN PUSH BUTTON GP1 OUT1 VP2 nRSTO To Battery SW2 OUT2 OUT2 OUT1 GP2 nPBSTAT VP3 OUT1 To Battery SW3 nIRQ OUT3 OUT3 System Control GP3 PWRHLD INL45 VSEL REG4 LDO SCL SDA Serial Interface REG5 LDO VDDREF To Battery OUT4 OUT4 OUT5 OUT5 To Battery INL67 REFBP To Battery Reference REG6 LDO GA REG7 LDO EP Innovative PowerTM -2- OUT6 OUT6 OUT7 OUT7 www.active-semi.com Copyright © 2011 Active-Semi, Inc.