AAT1171 Datasheet – 600mA, Voltage-Scaling Step-Down Converter

Part Number: AAT1171

Function: 600mA, Voltage-Scaling Step-Down Converter for RF Power Amplifier

Pacage : TDFN33-12 ( 3x3mm 12-pin )

Manufacturer: Advanced Analogic Technologies


AAT1171 datasheet


The AAT1171 SwitchReg dynamically controls the operating voltage of a WCDMA or CDMA power amplifier inside single-cell, 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.


1. VIN Range: 2.7V to 5.5V
2. Variable Output Voltage: 0.6V to 3.6V
3. 600mA Output Current
4. DAC Input: 0.2V to 1.2V
5. High Output Accuracy : ±3%
6. 45µA No Load Quiescent Current
7. Internal Soft Start Limits Startup Current and Output Voltage Overshoot
8. Synchronizable to External 19.8MHz System Clock


1. WCDMA or CDMA PA in Cellular Phones, Smartphones, Feature Phones, etc.
2. Express Card
3. PCMCIA Data Cards

Other data sheets are available within the file: AAT1171IWP-1-T1, AAT1171IWP-4-T1, AAT1171IWP-5-T1

AAT1171 Datasheet PDF Download

AAT1171 pdf