ACT8945A Datasheet PDF - Active-Semi
| Part Number | ACT8945A | |
| Description | Advanced PMU | |
| Manufacturers | Active-Semi | |
| Logo |  |
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ACT8945A
Rev 2, 11-Feb-14
Advanced PMU for Atmel SAMA5D3 Series & SAM9 Series Processors
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, highly-
efficient ActivePMUTM 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 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
ActivePathTM 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
Innovative PowerTM
Active-Semi Proprietary―For Authorized Recipients and Customers
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
-1-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
Free Datasheet http://www.Datasheet4U.com
|
| |
 
ACT8945A
Rev 2, 11-Feb-14
PIN DESCRIPTIONS
PIN NAME
DESCRIPTION
1
REFBP
Reference Bypass. Connect a 0.047μF ceramic capacitor from REFBP to GA. This pin is
discharged to GA in shutdown.
2 OUT1 Output Feedback Sense for REG1.
3
GA
Analog Ground. Connect GA directly to a quiet ground node. Connect GA, GP12 and GP3
together at a single point as close to the IC as possible.
4
OUT4
REG4 output. Capable of delivering up to 320mA of output current. Connect a 3.3µF ceramic
capacitor from OUT4 to GA. The output is discharged to GA with 1.5kΩ resistor when disabled.
5
OUT5
REG5 output. Capable of delivering up to 320mA of output current. Connect a 3.3µF ceramic
capacitor from OUT5 to GA. The output is discharged to GA with 1.5kΩ resistor when disabled.
6
INL
Power Input for REG4, REG5, REG6, and REG7. Bypass to GA with a high quality ceramic
capacitor placed as close to the IC as possible.
7
OUT7
REG7 output. Capable of delivering up to 320mA of output current. Connect a 3.3µF ceramic
capacitor from OUT7 to GA. The output is discharged to GA with 1.5kΩ resistor when disabled.
8
OUT6
REG6 output. Capable of delivering up to 320mA of output current. Connect a 3.3µF ceramic
capacitor from OUT6 to GA. The output is discharged to GA with 1.5kΩ resistor when disabled.
Master Enable Input. Drive nPBIN to GA through a 50kΩ resistor to enable the IC, drive nPBIN
9 nPBIN directly to GA to assert a manual reset condition. Refer to the nPBIN Multi-Function Input section
for more information. nPBIN is internally pulled up to VSYS through a 35kΩ resistor.
10
PWRHLD
Power Hold Input. Enable input for all regulators. PWRHLD is internally pulled down to GA through
a 500kΩ resistor. Refer to the Control Sequences section for more information.
11 nRSTO Active Low Reset Output. See the nRSTO Output section for more information.
12
nIRQ
Open-Drain Interrupt Output. nIRQ is asserted any time an unmasked fault condition exists or a
charger interrupt occurs. See the nIRQ Output section for more information.
13
nPBSTAT
Active-Low Open-Drain Push-Button Status Output. nPBSTAT is asserted low whenever the
nPBIN is pushed, and is high-Z otherwise. See the nPBSTAT Output section for more information.
14
GP3
Power Ground for REG3. Connect GA, GP12, and GP3 together at a single point as close to the
IC as possible.
15 SW3 Switching Node Output for REG3.
16
VP3
Power Input for REG3. Bypass to GP3 with a high quality ceramic capacitor placed as close to the
IC as possible.
17 OUT3 Output Feedback Sense for REG3.
18 NC1 No Connect. Not internally connected.
19
nLBO
Low Battery Indicator Output. nLBO is asserted low whenever the voltage at LBI is lower than
1.2V, and is high-Z otherwise. See the Precision Voltage Detector section for more information.
20
LBI
Low Battery Input. The input voltage is compared to 1.2V and the output of this comparison drives
nLBO. See the Precision Voltage Detector section for more information.
21 ACIN AC Input Supply Detection. See the Charge Current Programming section for more information.
22 CHGLEV Charge Current Selection Input. See the Charge Current Programming section for more information.
Innovative PowerTM
Active-Semi Proprietary―For Authorized Recipients and Customers
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
-5-
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
Free Datasheet http://www.Datasheet4U.com
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ACT8945A electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ACT8945A.PDF Datasheet ] | |
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