AAT1171 PDF Datasheet


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Description

This is Voltage-Scaling Step-Down Converter. 600mA Voltage-Scaling Step-Down Converter for RF Power Amplifiers with Bypass Switch General Description 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. AAT1171 Features SwitchReg™ 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 45 A of no load quiescent current. The 2MH- switching frequency minimizes the size of external components while keeping switching losses low. A low resistance MOSFET, typically 230mΩ, provides a low dropout voltage as the battery input voltage approaches the programmed o.