AAT1171 | 600mA Voltage-Scaling Step-Down DC/DC 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. The AAT1171 output voltage is controlled via an Analog signal from the baseband processor. It CAN deliver 600mA of continuous load current while maintaining a low 45A of no load quiescent current. The 2MHz switching frequency minimizes the size of external components while keeping switching losses low. A low resistance MOSFET typically 230m, provides a low dropout voltage as the battery input voltage approaches the programmed output voltage and the converter runs at 100% duty cycle. To further improve system efficiency, an 85m bypass MOSFET Transistor is also included to allow the PA to be powered directly from the battery. The AAT1171 feedback and control method gives excellent load regulation and transient response while maintaining small external components. The output voltage responds in less than 30s. The converter CAN be synchronized to an external system Clock forced to operate in Light Load (LL) mode for highest efficiency at light loads, or in Pulse Width Modulation (PWM) mode for low noise operation. The AAT1171 is available in a Pb-free, space-saving TDFN33-12 package and is rated over the -40C to +85C temperature range.
By Advanced Analogic Technologies, Inc.
AAT1171 's PackagesAAT1171 's pdf datasheet

AAT1171 Pinout, Pinouts
AAT1171 pinout,Pin out
This is one package pinout of AAT1171,If you need more pinouts please download AAT1171's pdf datasheet.

AAT1171 Application circuits
AAT1171 circuits
This is one application circuit of AAT1171,If you need more circuits,please download AAT1171's pdf datasheet.

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