Patent ID: 7602167
Filing Date: 2009-10-13
Classification: G05F

Abstract:
1. An integrated circuit, comprising: a plurality of terminals including at least one output terminal and at least one input terminal; and a configurable voltage regulator operable in a first mode or a second mode, comprising: output driver circuitry, having an output terminal and an output coupled to said output terminal; control circuitry, having an input terminal and at least one input coupled to said input terminal, having an output coupled to the output driver circuitry, and including a plurality of elements; configuration circuitry, for receiving a configuration signal; and at least one configuration switch, for selectably coupling elements of a feedback circuitry to the output driver circuitry responsive to control signals from the configuration circuitry, wherein the control circuitry comprises: an error amplifier having a first input coupled to a first input terminal, having a second input receiving a reference voltage, and having an output; switching regulator control circuitry, having a first input and having an output; wherein the at least one configuration switch comprises: a first configuration switch for connecting the output of the error amplifier to the switching regulator control circuitry in a first position; a second configuration switch, for connecting the output of the switching regulator control circuitry in a first position; wherein the first and second configuration switches connect the output of the error amplifier to the output driver circuitry when in a second position; and wherein the first and second configuration switches switch to the first and second positions responsive to a signal from the configuration circuitry.