PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
General Description
The AAT2601 is a member of AnalogicTech’s Total Power
Management IC
TM
(TPMIC
TM
) 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 also includes 2 load switches for
dynamic power path/sleep mode operation, making it
ideal for small handheld portable 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 I
2
C 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 I
2
C 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 AAT2601 is available in a thermally enhanced low
profile 5x5x0.8mm 36-pin TQFN package.
Features
• Voltage Regulator V
IN
Range: 4.5V to 6V
• Complete Power Integration
▪
Integrated Load Switches to Power Converters from
AC Adapter or Battery Automatically
• 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 I
2
C
▪
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
2601.2008.01.1.0
www.analogictech.com
1
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