AAT2601B Datasheet, PDF (1/39 Pages) Skyworks Solutions Inc. – Total Power Solution for Portable Applications

DATA SHEET
AAT2601B
Total Power Solution for Portable Applications
General Description
The AAT2601B is a member of Skyworks' Total Power
Management IC (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 navigation devices.
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 inter-
nal compensation and operates at a switching frequency
of 1.5MHz, thus minimizing the size of external compo-
nents while keeping switching losses low and efficiency
greater than 92%.
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 AAT2601B is available in a thermally enhanced low
profile 5x5x0.75mm 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, LDO1, and LDO2 Active,
No Load
• One Step-Down Buck Converter
▪ 1.8V, 300mA Output
▪ 1.5MHz Switching Frequency
▪ ^{Fast Turn-On Time (100μs typ)}
• Five LDOs Programmable with I²_C
▪ ^{LDO1: 3.3V, 300mA Programmable with I2C}
▪ LDO2: 1.2V, 150mA
▪ LDO3: 1.2V, 150mA
▪ LDO4: 3.3V, 150mA Programmable with I²C
▪ LDO5: 3.3V, 150mA Programmable with I²C
▪ 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
• GPS and PND
• Handheld Instruments
• PDAs and Handheld Computers
• Portable Media Players
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202181B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 19, 2013
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