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