Patent ID: 7508174
Filing Date: 2009-03-24
Classification: H02M,Y02B

Abstract:
1. An anti-ringing switching regulator comprising: a first transistor having at least two states: ON and low current state, a second transistor, and an inductor electrically connected to a common node, wherein the first transistor is electrically connected with an input terminal, the second transistor is electrically connected to ground, and the inductor is electrically connected to an output terminal, and wherein power is transmitted from the input terminal to the output terminal by switching the states of the first and second transistors; a current control circuit for setting the first transistor into the low current state, the current control circuit including a third transistor and a current source electrically connected with the third transistor; and a multiplexer circuit having one of its inputs receiving the output of the current control circuit, and an output controlling the gate of the first transistor; wherein when the multiplexer circuit selects the current control circuit, the current control circuit mirrors the current of the current source proportionally to the first transistor.