AAT3603 Total Power Solution for Portable Applications

The AAT3603 is a member of AnalogicTech’s 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 is ideal for low cost 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 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 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 current. The total no load current when the step-down converter and 2 LDOs are enabled is only 170μA. The AAT3603 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
Low Cost Power Integration
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

应用领域 APPLICATION

Digital Cameras
GSM or CDMA Cellular Phones
Handheld Instruments
PDAs and Handheld Computers
Portable Media Players
Short-Range Communication Headsets

订购信息 Ordering Information

AAT3603

AAT3603 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
AAT3603 数据资料DataSheet下载:pdf	Rev.V2	2 页