Patent ID: 6731486
Filing Date: 2004-05-04
Classification: H02M,Y02B

Abstract:
A circuit for providing a regulated voltage comprising:a switching voltage regulator, comprising: an upper transistor connected to an input voltage from a voltage source, the upper transistor having a control terminal; a lower transistor connected to the upper transistor, the lower transistor having a control terminal; and a voltage regulator controller connected to receive the regulated voltage, the voltage regulator controller operable to generate a first control signal applied to the control terminal of the upper transistor, and further operable to generate a second control signal applied to the control terminal of the lower transistor; and a voltage protection circuit comprising: an over-voltage detector circuit powered by the regulated output voltage operable to detect an over-voltage condition and further operable to generate an over-voltage detected signal, wherein the over-voltage detected signal causes the lower transistor to draw sufficient current from the voltage source such that the over-voltage condition is abated.