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Power Solution. AAT3603 Datasheet |
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PRODUCT DATASHEET
AAT3603178
Total Power Solution for Portable Applications
General Description
The AAT3603 is a member of AnalogicTech’s Total Power
wwMwa.dnaatagsehmeeet4nut.cIoCmTM (TPMICTM) product family. It contains a
single-cell Lithium Ion/Polymer battery charger, a fully
integrated step-down converter and 5 low dropout (LDO)
regulators. The device is ideal for low cost handheld por-
table GSM or CDMA mobile telephones.
The battery charger is a complete thermally regulated
constant current/constant voltage linear charger. It
includes an integrated pass device, reverse blocking pro-
tection, high accuracy current and voltage regulation,
charge status, and charge termination. The charging
current, charge termination current, and recharge volt-
age are programmable with an external resistor and/or
by a standard I2C interface.
The step-down DC/DC converter is integrated with internal
compensation and operates at a switching frequency of
1.5MHz, thus minimizing the size of external components
while keeping switching losses low and efficiency greater
than 95%. All LDO output voltages are programmable
using the I2C interface.
The five LDOs offer 60dB power supply rejection ratio
(PSRR) and low noise operation making them suitable for
powering noise-sensitive loads.
All six voltage regulators operate with low quiescent cur-
rent. The total no load current when the step-down con-
verter and 2 LDOs are enabled is only 170μA.
The AAT3603 is available in a thermally enhanced low
profile 5x5x0.8mm 36-pin TQFN package.
Features
• Voltage Regulator VIN Range: 4.5V to 6V
• Low Cost Power Integration
• Low Standby Current
▪ 170μA (typ) w/ Buck (Core), LDO1 (PowerDigital),
and LDO2 (PowerAnalog) Active, No Load
• One Step-Down Buck Converter (Core)
▪ 1.8V, 300mA Output
▪ 1.5MHz Switching Frequency
▪ Fast Turn-On Time (120μs typ)
• Five LDOs Programmable with I2C
▪ LDO1: 3.0V, 300mA (PowerDigital)
▪ LDO2: 3.0V, 150mA (PowerAnalog or PLL)
▪ LDO3: 3.0V, 150mA (TCXO)
▪ LDO4: 3.0V, 150mA (TX)
▪ LDO5: 3.0V, 150mA (RX)
▪ PSRR: 60dB@10kHz
▪ Noise: 50μVrms for LDO3, LDO4, and LDO5
• One Battery Charger
▪ Digitized Thermal Regulation
▪ Charge Current Programming up to 1.4A
▪ Charge Current Termination Programming
▪ Automatic Trickle Charge for Battery Preconditioning
(2.8V Cutoff)
• Adapter OK (ADPP) and Reset (RESET) Timer Outputs
• Separate Enable Pins for Supply Outputs
• Over-Current Protection
• Over-Temperature Protection
• 5x5mm TQFN55-36 Package
Applications
• Digital Cameras
• GSM or CDMA Cellular Phones
• Handheld Instruments
• PDAs and Handheld Computers
• Portable Media Players
3603.2008.06.1.0
www.analogictech.com
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Typical Application
PRODUCT DATASHEET
AAT3603178
Total Power Solution for Portable Applications
www.datasheet4u.com
CHGIN
5V from
AC Adapter or USB Port
10μF
To BAT
100k
ADPP
STAT
ENBAT
To
BAT
100k
SDA
To 100k
BAT
SCL
EN_TEST
μC
EN_HOLD
EN_KEY
ON_KEY
RESET
To OUT1 100k EN2
EN3
EN4
EN5
AVIN2
To BAT
Charger
Control
Ref
I2C
and
Enable
Control
UVLO
BAT
22μF
+ 1 cell
- Li+
battery
VIN
Step-down
Ref BUCK
Enable
TS
CT
0.1μF
ISET
10kΩ
NTC
For BAT
Temp sense
1.24k
To BAT
PVIN
Core : 1.8V
LX 3.3μH
300mA
10μF
OUTBUCK
PGND
4.7μF
VIN
REF
CNOISE
To BAT
AVIN1
0.01μF
AGND
OUT5
RX
3.0V
150mA
OUT4
TX
3.0V
150mA
4.7μF
OUT3
TCXO
3.0V
150mA
4.7μF
OUT2
PowerAnalog
3.0V
150mA
4.7μF
OUT1
PowerDigital
3.0V
300mA
4.7μF
22μF
2
www.analogictech.com
3603.2008.06.1.0
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