FEATURES

• Three Step-Down DC/DC Converters

• Four Low-Dropout Linear Regulators

• Integrated ActivePathTM Charger

• I2CTM Serial Interface

• Advanced Enable/Disable Sequencing Controller

• Minimal External Components

• Tiny 5×5mm TQFN55-40 Package

− 0.75mm Package Height

− Pb-Free and RoHS Compliant

GENERAL DESCRIPTION

The ACT8945A is a complete, cost effective, highlyefficient

ActivePMTM power management solution,

optimized for the unique power, voltage- sequencing,

and control requirements of the Atmel SAMA5D3 series:

SAMA5D[31/33/34/35/36], and Atmel SAM9 series:

SAM9G[15/25/35/45/46], SAM9X[25/35], SAM9M[10/11],

SAM9N[11/12] processors. It is ideal for a wide range of

high performance portable handheld applications such as

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, POS terminals, medical devices and white

goods. This device integrates the ActivePathTM complete

battery charging and management system with seven

power supply channels.

This device features three step-down DC/DC

converters and four low-noise, low-dropout linear

regulators, along with a complete battery charging

solution featuring the advanced ActivePathTM

system-power selection function.

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 1100mA of output

current, while the third supports up to 1200mA. All

four low-dropout linear regulators are highperformance,

low-noise regulators that supply up to

320mA of output current.

The ACT8945A is available in a compact, Pb-Free

and RoHS-compliant TQFN55-40 package