AAT2601 Datasheet, PDF (19/38 Pages) Advanced Analogic Technologies – Total Power Solution for Portable Applications

Functional Block Diagram
SYSOUT
500mΩ
SYSOUT
LDO
CHGIN
PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
100 mΩ
BAT
ENBAT
USE_USB
Charger
Control
Ref
ADPP
STAT
ISET
TS
CT
SDA
SCL
EN_TEST
EN_HOLD
EN_KEY
ON_KEY
EN2
EN3
EN4
EN5
AVIN2
I²C
and
Enable
Control
UVLO
VIN
BUCK
Ref
Enable
VIN
REF
RESET
PVIN
LX
OUTBUCK
PGND
CNOISE
AVIN1
AGND
Functional Description
The AAT2601 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. Internal load switches allow the
LDO regulators and DC-DC converter to operate from the
best available power source of either an AC wall adapter,
USB port supply or battery.
If only the battery is available, then the voltage regula-
tors and converter are powered directly from the battery
through a 100mΩ load switch. (The charger is put into
sleep mode and draws less than 1μA quiescent current.)
2601.2008.01.1.0
www.analogictech.com
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