Patent ID: 7834603

Claim:
An electronic circuit, comprising: a switching regulator circuit, comprising: a first transistor having an input node, an output node, and a control node, wherein the input node of the first transistor is coupled to receive a power supply voltage; a second transistor having an input node, an output node, and a control node, wherein the input node of the second transistor is coupled to the output node of the first transistor, wherein the output node of the second transistor is coupled to receive a reference voltage; and a control circuit having a first output node at which a first control signal is provided and a second output node at which a second control signal is provided, wherein the first output node of the control circuit is coupled to the control node of the first transistor, and wherein the second output node of the control circuit is coupled to the control node of the second transistor; and an overvoltage detection circuit having an input node coupled to receive the power supply voltage and an output node at which an overvoltage signal is provided capable of an overvoltage state indicative of the power supply voltage being above a predetermined threshold voltage, wherein the control circuit is coupled to receive the overvoltage signal, and wherein the control circuit is configured, in response to the overvoltage signal being in the overvoltage state, to generate the first control signal resulting in the first transistor being in an off condition.