ACT8945A Advanced PMU solutions for the latest Atmel SAMA5 D2x, and D3x, D4x family eMPUs

ACT8945A is a cost effective, highly efficient ActivePMU™ power management solution, optimized for the unique power, voltage sequencing, and control requirements of the Atmel SAMA5 and SAM9 based eMPU series processors. It is ideal for a wide range of high performance portable handheld applications such as smartwatches. wearables, POS terminals, tablet PCs, human-machine interfaces, control panels, smart grid infrastructures, network gateways, M2M systems, 2D barcode scanners, barcode printers, machine vision equipment, as well as home and commercial building automations, medical devices and white goods.

This device features three step-down DC/DC converters and four low-noise, low-dropout (LDO) regulators, along with a complete battery charging solution featuring ActivePath™ system-power selection function. The three DC/DC converters utilize a high efficiency, fixed-frequency (2MHz), current-mode PWM control architecture that reduces the number of external components. Two DC/DCs are capable of supplying up to 1100mA of output current, while the third supports up to 1200mA. All four LDO regulators are high performance, low-noise regulators capable of supplying up to 320mA of output current.



Ordering Info

PART NUMBER

VOUT1

VOUT2

VOUT3

VOUT4

VOUT5

VOUT6

VOUT7

PACKAGE

PINS

TEMPERATURE RANGE

ACT8945AQJ305-T   pdf

1.8V

1.2V

3.3V

2.5V

3.3V

OFF

OFF

TQFN55-40

40

-40°C to +85°C

ACT8945AQJ405-T   pdf

1.5V/1.35V

1.2V

3.3V

2.5V

3.3V

OFF

OFF

TQFN55-40

40

-40°C to +85°C

Key Features & Benefits

  • Up to 80% Component Count Reduction vs. Discrete Solutions
  • Up to 50% Solution Price Reduction
  • 2-4x Higher Reliability
  • 80% Reduction in Design Effort
  • <2mW Standby Power
  • Integrated Sequencing control: Pre-validated & Programmable for Atmel Processor Solutions
  • Lowest Noise for Analog Rails on Noise Sensitive Application
  • I2C™ Serial Interface
  • Integrate ActivePath™ Technology for Complete Battery Charging and Management

Block Diagram



Typical Application Diagram


Supported Applications


Evaluation Kit

ACT8945AEV is an evaluation kit (EVK) for Active-Semi's ACT8945A ActivePMU™ IC. The EVK contains a fully assembled and tested circuit board designed to demonstrate all the features of ACT8945A. ACT8945AEV includes a variety of test points and jumpers as necessary to configure and evaluate the ACT8945A's functionality.


Atmel Design References


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