EA8945AQJ405 Datasheet, PDF (1/44 Pages) Active-Semi, Inc – Advanced PMU for Atmel SAMA5Dx Series & SAM9 Series Processors

ACT8945A
Rev 6, 01-Feb-16
Advanced PMU for Atmel SAMA5Dx Series & SAM9 Series Processors
FEATURES
 Three Step-Down DC/DC Converters
 Four Low-Dropout Linear Regulators
 Integrated ActivePath^TM Charger
 I²C^TM 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, highly-
efficient ActivePMU^TM power management solution,
optimized for the unique power, voltage-
sequencing, and control requirements of the Atmel
SAMA5D2 ,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 ActivePath^TM
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 ActivePath^TM
system-power selection function.
The three DC/DC converters utilize a high-
efficiency, 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 high-
performance, 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.
TYPICAL APPLICATION DIAGRAM
CHGIN
ACT8945A
Li+ Battery
+
TH
Atmel
SAMA5Dx
PUSH BUTTON
ISET
ActivePath^TM Charger
Control
nSTAT
CHARGE
STA TUS
nPBIN
REG1 1.8V
REG2 _1.2V
REG3 3.3V
REG4
REG5
REG6
REG7
SDA
SCL
1150mA
1150mA
1300mA
320mA
320mA
320mA
320mA
VDDIODDR etc.
VDDCORE_GBIT ENET etc.
VDDIOP etc.
VDDFUSE
VDDANA
Auxiliary 1
Auxiliary 1
TWD
TWCK
nRSTO
nIRQ
nPBSTAT
NRST
FIQ/IRQ
GPIO
ActivePMU^TM and ActivePath^TM are trademarks of Active-Semi.
I²C^TM is a trademark of NXP.
-1-
www.active-semi.com
Copyright © 2016 Active-Semi, Inc.