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AAT3603 Datasheet(PDF) 19 Page - Advanced Analogic Technologies

Part # AAT3603
Description  Total Power Solution for Portable Applications
PDF  35 Pages
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Manufacturer  ANALOGICTECH [Advanced Analogic Technologies]
Direct Link  http://www.analogictech.com
Logo ANALOGICTECH - Advanced Analogic Technologies

AAT3603 Datasheet(HTML) 19 Page - Advanced Analogic Technologies

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AAT3603178
Total Power Solution for Portable Applications
PRODUCT DATASHEET
3603.2008.06.1.0
19
www .analogictech.com
AAT3603178
Total Power Solution for Portable Applications
PRODUCT DATASHEET
3603.2008.06.1.0
19
www .analogictech.com
Functional Block Diagram
Enable
BUCK
CHGIN
UVLO
BAT
PGND
PVIN
LX
OUTBUCK
VIN
REF
AVIN2
EN5
EN4
EN3
EN_TEST
EN_HOLD
RESET
Ref
CNOISE
AGND
AVIN1
VIN
I2C
and
Enable
Control
EN_KEY
ON_KEY
SDA
SCL
ISET
Ref
Charger
Control
STAT
ADPP
ENBAT
TS
CT
EN2
Functional Description
The AAT3603 is a complete power management solution.
It seamlessly integrates an intelligent, stand-alone CC/
CV (Constant Current/Constant Voltage), linear-mode
single-cell battery charger with one step-down Buck con-
verter and five low-dropout (LDO) regulators to provide
power from either a wall adapter or a single-cell Lithium
Ion/Polymer battery.
If only the battery is available, then the voltage regula-
tors and converter are powered directly from the battery.
(The charger is put into sleep mode and draws less than
1μA quiescent current.)
Typical Power Up Sequence
The AAT3603 supports a variety of push-button or
enable/disable schemes. A typical startup and shutdown
process proceeds as follows (referring to Figures 1 and
2): System startup is initiated whenever one of the fol-
lowing conditions occurs:
1) A push-button is used to assert EN_KEY low.
2) A valid supply (>CHGIN UVLO) is connected to the
charger input CHGIN.
3) A hands free device or headset is connected, assert-
ing EN_TEST high.



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