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Text: User's Guide SNOI158AP – January 2011 – Revised MARCH 2013 AN-2105 LM3243 DSBGA Evaluation Board 1 Introduction The Texas Instruments LM3243 evaluation board is a working demonstration of a step-down DC-DC converter optimized for powering multi-mode 2G/3G/4G RF power amplifiers PAs from a single LithiumIon cell. Output voltage is set using a VCON analog input for controlling power levels and efficiency of the