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AAT3601_13 Datasheet, PDF (1/37 Pages) Skyworks Solutions Inc. – Total Power Solution for Portable Applications | |||
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DATA SHEET
AAT3601
Total Power Solution for Portable Applications
General Description
The AAT3601 is a member of Skyworks' Total Power
Management IC (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 portable short-range communications
enabled mobile devices and 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 and the charge termination current as well as
recharge voltage are programmable with either an exter-
nal 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 95%. All LDO output voltages are program-
mable 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. The LDOs and DC/DC
converter are separated into Permanent-Enabled (PE)
and Non-Permanent (NP) enabled supplies.
All six voltage regulators operate with low quiescent cur-
rent. The total no load current when the 3 PE LDOs are
enabled is only 200μA.
The device includes a watchdog timer input and two
reset outputs for the watchdog and LDO regulation. The
device also can be programmed through a standard I2C
interface.
The AAT3601 is available in a thermally enhanced low
profile 5x5x0.75mm 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
⪠200μA (typ) w/LDO1, LDO2 and LDO5 Active,
No Load
⢠One Step-Down Buck Converter (NP)
⪠1.24V, 300mA Output
⪠1.5MHz Switching Frequency
⪠Fast Turn-On Time (120μs typ)
⢠Five LDOs Programmable by I2C
⪠LDO1: 3.4V, 150mA (PE)
⪠LDO2: 3.4V, 300mA (NP)
⪠LDO3: 1.24V, 300mA (PE)
⪠LDO4: 1.85V, 300mA (NP)
⪠LDO5: 1.85V, 300mA (PE)
⪠PSRR: 60dB @10kHz
⪠Noise: 50μVrms
⢠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)
⢠Watchdog (WDI) Timer Input
⪠Two Reset (RSTIN, RSTLPW) Timer Outputs
⢠Separate Enable Pins for PE and NP Supplies
⢠Digital Programming of Major Parameters via I2C
⢠Over-Current Protection
⢠Over-Temperature Protection
⢠5x5x0.75mm TQFN55-36 Package
Applications
⢠Digital Cameras
⢠GSM or CDMA Cellular Phones
⢠Handheld Instruments
⢠PDAs and Handheld Computers
⢠Portable Media Players
⢠Short-Range Communication Headsets
Skyworks Solutions, Inc. ⢠Phone [781] 376-3000 ⢠Fax [781] 376-3100 ⢠sales@skyworksinc.com ⢠www.skyworksinc.com
202210B ⢠Skyworks Proprietary Information ⢠Products and Product Information are Subject to Change Without Notice. ⢠March 20, 2013
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