Patent ID: 7995363
Filing Date: 2011-08-09
Classification: H02M

Abstract:
1. A DC-DC converter comprising: a charge pump unit that precharges a boost node in response to a precharge clock pulse and boosts the boost node to a boosted voltage in response to a pump clock pulse; a clock pulse generator unit that generates the precharge clock pulse and the pump clock pulse in which corresponding pulse widths increase over time during a plurality of time intervals; and a pulse-width controller that outputs a plurality of pulse-width control signals for shortening turn-on times of the precharge clock pulse and the pump clock pulse at an initial operation time, and lengthening the turn-on times by the pulse widths for corresponding durations of the time intervals, after storing the pulse widths and corresponding durations according to the time intervals, wherein the charge pump unit comprises: wherein the clock pulse generator unit comprises: