Patent ID: 7579816

Claim:
A voltage converter comprising: a switching circuit having an input node coupled to receive a supply voltage; regulator circuitry coupled to the switching circuit, the regulator circuitry selectively configurable to provide at an output node a regulated load voltage either with the same polarity as the supply voltage or with an inverted polarity relative to the supply voltage; a control circuit comprising an input node and a control signal output node coupled to the control input of the switching circuit to provide a control signal thereto; and a feedback circuit comprising a feedback node having a voltage level related to the load voltage, the feedback node coupled to the control circuit input node for regulation at both the same voltage polarity and inverted voltage polarity relative to the polarity of the supply voltage, wherein the switching circuit and the control circuit are formed on an integrated circuit having only one feedback pin through which the feedback node and the control circuit input node are coupled, and the control circuit generates the control signal to be proportional to the voltage at the feedback pin.