AAT2601B Total Power Solution for Portable Applications

The AAT2601B 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 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 protection, high accuracy current and voltage regulation, charge status, and charge termination. The charging current, charge termination current, and recharge voltage 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 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 current. The total no load current when the step-down converter and 2 LDOs are enabled is only 170μA. The AAT2601B is available in a thermally enhanced low profile 5x5x0.8mm 36-pin TQFN package.

技术特性

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
3.3V, 300mA Output (AAT2601BA-3.3 ONLY)
1.5MHz Switching Frequency
Fast Turn-On Time (100μs 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
AAT2601B Typical UVLO: 2.35V
AAT2601BA Typical UVLO: 2.9V
Separate Enable Pins for Supply Outputs
Over-Current Protection
Over-Temperature Protection
5x5mm TQFN55-36 Package

应用领域 APPLICATION

Digital Cameras
GSM or CDMA Cellular Phones
Handheld Instruments
PDAs and Handheld Computers
Portable Media Players

订购信息 Ordering Information

AAT2601B

AAT2601B 典型应用

应用技术支持与电子电路设计开发资源下载	版本信息	大小
AAT2601B 数据资料DataSheet下载:pdf	Rev.V2	2 页