Patent ID: 8030910
Filing Date: 2011-10-04
Classification: H02M,Y02B

Abstract:
1. A switching voltage regulator comprising: an inductor; a first switch responsive to a first signal and adapted to cause the inductor to be charged during a first period; a second switch responsive to a second signal and adapted to cause the inductor to be discharged during a second period; a control block adapted to vary a duty cycle of the first signal in accordance with a feedback signal representative of an output voltage of the switching voltage regulator; and a first comparator adapted to compare a voltage across the second switch to a first voltage to determine whether the second switch is to transition to a closed state, said first comparator further adapted to generate a first comparison signal having a first level if the second switch is in a closed state and a current flowing through the second switch is above a predefined threshold value, said first comparator further adapted to generate the first comparison signal having the first level if the second switch is in an open state, said first comparator further adapted to generate the first comparison signal having a second level if the second switch is in a closed state and the current flowing through the second switch is equal to or less than the predefined threshold value.