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Product Features

  • Integrated Power Supplies
  • Four DC/DC Step-Down (Buck) Regulators
  • Five Low-Noise LDOs
  • Three Low-Input Voltage LDOs
  • One Low IQ Keep-Alive LDO
  • Backup Battery Charger
  • Six General Purpose I/O with PWM Drivers
  • I2C Serial Interface
  • Interrupt Controller
  • Reset Interface and Sequencing Controller
  • Multiple Sleep Modes
  • TQFN66 48

The ACT8847 is a complete, cost effective, and highly-efficient ActivePMUTM power management solution optimized for the power, voltage sequencing and control requirements of Samsung Exynos 4210 (S5PC210/S5PV310) and other application processors.

The ACT8847 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. Dynamic Voltage Scaling (DVS) is supported either by dedicated control pins, or through I2C interface to optimize the energy-per task performance for the processor. This device also includes eight low-noise LDOs, one always-ON LDO and an integrated backup battery charger to provide a complete power system for the processor. The power sequence and reset controller provides power-on reset, SW-initiated reset, and power cycle reset for the processor.

Multiple sleep modes with autonomous sleep and wake-up sequence control are supported. The thermal management and protection subsystem allows the host processor to manage the power dissipation of the PMU and the overall system dynamically.

The ACT8847 is available in a compact, Pb-Free and RoHS-compliant TQFN66-48 package.

 

Advantages of our Modular Power PMU

Features Benefits
Space Saving With fully integrated power stages with high switching frequency
of 2.25MHz (1.125Mhz) to reduce external component size
Integrated sequencing Easy system level design with programmable Reset and Power
Good functions allows for flexible sequencing options
Seamless sequencing With external supplies via integrated GPIOs and Power Good signals
Highly configurable Via a I2C uP interface for status reporting and controlling

 

 

 

  • Evaluation kit for ACT8847QM502-T

 

Reference Design

 PMU Reference Design Solutions for i.MX6x Processors