ACT8848

ACT8848 Product Brief, 05-Dec-12 Advanced PMU for Multi-core Application Processors FEATURES INTEGRATED POWER SUPPLIES GENERAL DESCRIPTION The ACT8848 is a complete, cost effective, and highly-efficient ActivePMUTM power management solution optimized for the power, voltage sequencing and control requirements of Telechips TCC88xx and Samsung S5PC210 application processors. (Please see the ORDERING INFORMATION section to get the Full Part Numbers.) The ACT8848 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 processors. Dynamic Voltage Scaling (DVS) is supported either by dedicated control pins, or through I2C interface to optimize the energy-pertask performance for the processors. This device also includes eight low-noise LDOs (up to 350mA per LDO), one always-ON LDO and an integrated backup battery charger to provide the complete power system for the processors. 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 cont...