ACT8846 Product Brief, 22-Oct-12 Advanced PMU for Multi-core Application Processors FEATURES GENERAL DESCRIPTION INTEGRATED POWER SUPPLIES The ACT8846 is a complete, cost effective, and highly-efficient ActivePMUTM power management solution optimized for the power, voltage sequencing and control requirements of Rockchip RK3066 application processor family. • Four DC/DC Step-Down (Buck) Regulators − 2 x 2.8A, 2 x 1.5A • Five Low-Noise LDOs − 2 x 150mA, 3 x 350mA The ACT8846 features four fixed-frequency, current-mode, synchronous PWM step-down converters that achieve peak efficiencies of up to 97%. These regulators operate with a fixed frequency of 2.25MHz, minimizing noise in sensitive applications and allowing the use of small external components. These buck regulators supply up to 2.8A of output current and can fully satisfy the power and control requirements of the multi-core application processor. Dynamic Voltage Scaling (DVS) is supported either by dedicated control pins, or through I2C interface to optimize the energy-pertask performance for the processor. This device also include eight low-noise LDOs (up to 350mA per LDO), one always-on LDO and an integrated backup battery charger to provide a complete power system for the processor. • Three Low-Input Voltage LDOs − 1 x 150mA, 2 x 350mA • One Low IQ Keep-Alive LDO • Backup Battery Charger SYSTEM CONTROL AND INTERFACE • Four General Purpose I/O with PWM Drivers • I2C Serial Interface • Interrupt Controller SYSTEM MANAGEMENT • Reset Interface and Sequencing Controller − Power on Reset − Soft / Hard Reset − Watchdog Supervision − Multiple Sleep Modes The power sequence and reset controller provides power-on reset, SW-initiated reset, and power cycle reset for the processor. It also features the watchdog supervisory function. Multiple sleep modes with autonomous sleep and wake-up sequence control are supported. • Thermal Management Subsystem The thermal management and protection subsystem allows the host processor to manage the power dissipation of the PMU and the overall system dynamically. The PMU provides a thermal warning to the host processor when the temperature reaches a certain threshold such that the system can turn off some of the non-essential functions, reduce the clock frequency and etc to manage the system temperature. APPLICATIONS • • • • • Tablet PC Mobile Internet Devices (MID) E-books Personal Navigation Devices Smart Phones The ACT8846 is available in a compact, Pb-Free and RoHS-compliant TQFN66-48 package. Innovative PowerTM ActivePMUTM is a trademark of Active-Semi. I2CTM is a trademark of NXP. -1- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT8846 Product Brief, 22-Oct-12 PRODUCT OPTIONS Block Function Output Voltage Capability REG1 Step-Down DC/DC 0.6V to 3.9V 1500mA REG2 Step-Down DC/DC 0.6V to 3.9V 2800mA REG3 Step-Down DC/DC 0.6V to 3.9V 2800mA REG4 Step-Down DC/DC 0.6V to 3.9V 1500mA REG5 Low-Noise LDO 0.6V to 3.9V 150mA REG6 Low-Noise LDO 0.6V to 3.9V 150mA REG7 Low-Noise LDO 0.6V to 3.9V 350mA REG8 Low-Noise LDO 0.6V to 3.9V 350mA REG9 Low-Noise LDO 0.6V to 3.9V 350mA REG10 Low Input-Voltage LDO 0.6V to 3.9V 150mA REG11 Low Input-Voltage LDO 0.6V to 3.9V 350mA REG12 Low Input-Voltage LDO 0.6V to 3.9V 350mA REG13 Always-ON LDO 0.6V to 3.9V 50mA FUNCTIONAL BLOCK DIAGRAM Innovative PowerTM ActivePMUTM is a trademark of Active-Semi. I2CTM is a trademark of NXP. -2- www.active-semi.com Copyright © 2012 Active-Semi, Inc.