AAT1171 PDF – Voltage-Scaling Step-Down Converter

Part Number: AAT1171

Function: Voltage-Scaling Step-Down Converter

Package: TDFN33-12 Pin Type

Manufacturer: AAT

Images:AAT1171 pdf converter


The AAT1171 SwitchReg, a member of AnalogicTech’s Total Power Management IC™ (TPMIC™) product family, has been specifically designed to dynamically control the operating voltage of a WCDMA or CDMA power amplifier inside single lithium-ion battery-powered systems. The AAT1171 outputs a voltage between 0.6V and 3.6V, thereby optimizing the amplifier efficiency at both low and high transmit levels.


• VIN Range: 2.7V to 5.5V

• Variable Output Voltage: 0.6V to 3.6V

• 600mA Output Current

• DAC Input: 0.2V to 1.2V

• High Output Accuracy: ±3%

• 45µA No Load Quiescent Current

• Internal Soft Start Limits Startup Current and Output Voltage Overshoot

• Synchronizable to External 19.8MHz System Clock

• Over-Temperature and Current Limit Protection

• Integrated 85mΩ Bypass MOSFET

• 2MHz Operation

• PWM/LL Control with Override

AAT1171 pinout datasheet



• WCDMA or CDMA PA in Cellular Phones, Smartphones, Feature Phones, etc.

• Express Card

• PCMCIA Data Cards

AAT1171 PDF Datasheet

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