Mobile terminal with control of a driving voltage of a power amplifier therein

A mobile terminal and method of controlling a driving voltage of a power amplifier (220) therein are provided. The present invention includes a power amplifier module (220) having a plurality of operative modes, the power amplifier module (220) configured to amplify a power strength of an RF signal, a modem configured to deliver the RF signal to the power amplifier module (220), and to control the operative modes of the power amplifier module (220), a power detecting unit (230) configured to output a reference voltage by detecting the power strength of the RF signal outputted from the power amplifier module (220), and a DC/DC converter (240) configured to supply a driving voltage to the power amplifier module (220) by adjusting a detected power value according to a gain corresponding to each of the operative modes of the power amplifier module (220). Accordingly, a current consumption of a power amplifier module (220) is minimized, exothermic reaction is reduced in the course of a call, and a duration time of a battery is increased.