DC-DC CONVERTER, PORTABLE COMMUNICATION TERMINAL AND DC VOLTAGE CONVERSION METHOD

摘要

PROBLEM TO BE SOLVED: To solve the problem that a change in current consumption in a power supply destination circuit of a DC-DC converter changes an optimum value of an inductance value and an optimum value of a capacitance value in power conversion efficiency.;SOLUTION: A combination of an inductor and a capacitor to be used is changed according to current consumption in a power supply destination circuit by controlling a selection state of a first selector and a selection state of a second selector so that the first selector selects a first inductor and the second selector selects a first capacitor when an external circuit as a power supply destination is in a first state, and so that the first selector selects a second inductor and the second selector selects a second capacitor when the external circuit is in a second state that differs from the first state in average current consumption.;COPYRIGHT: (C)2013,JPO&INPIT