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AAT2601 Datasheet, PDF (1/38 Pages) Advanced Analogic Technologies – Total Power Solution for Portable Applications | |||
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PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
General Description
The AAT2601 is a member of AnalogicTechâs Total Power
Management ICTM (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 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 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 AAT2601 is available in a thermally enhanced low
profile 5x5x0.8mm 36-pin TQFN package.
Features
⢠Voltage Regulator VIN 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 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
2601.2008.01.1.0
www.analogictech.com
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