Patent ID: 7750611

Claim:
A voltage controller comprising: a pulse generator configured to generate a control signal in response to at least one of a mode signal and/or an external voltage; and an internal voltage control circuit coupled to the pulse generator, wherein the internal voltage control circuit is configured to generate an internal voltage at an internal voltage node, wherein the internal voltage control circuit includes, a voltage divider coupled between the internal voltage node and a first reference voltage wherein the voltage divider generates a feedback voltage that is between the internal voltage and the first reference voltage, a first comparator configured to generate a first comparison result responsive to comparing the feedback voltage with a second reference voltage, a second comparator configured to generate a second comparison result responsive to comparing the feedback voltage with the second reference voltage in response to the control signal, and a driver coupled between an external voltage and the internal voltage node, wherein the driver is configured to generate the internal voltage responsive to the first and second comparison results.