PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
Functional Block Diagram
SYSOUT
SYSOUT
LDO
500mΩ
100mΩ
CHGIN
BAT
ADPP
ENBAT
Charger
Control
STAT
ISET
USE_USB
TS
CT
Ref
RESET
PVIN
SDA
SCL
EN_TEST
EN_HOLD
EN_KEY
ON_KEY
UVLO
I2C
and
Enable
Control
VIN
Ref
LX
BUCK
OUTBUCK
Enable
PGND
VIN
REF
EN2
EN3
EN4
EN5
AVIN2
CNOISE
AVIN1
AGND
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.
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
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.)
w w w . a n a l o g i c t e c h . c o m
2601.2008.01.1.0
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ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
