Patent ID: 6559626
Filing Date: 2003-05-06
Classification: G05F

Abstract:
A voltage regulator for converting an input voltage into a regulated voltage equal to a command level, and outputting the regulated voltage, the voltage regulator comprising:a voltage detection circuit for detecting a regulator output voltage; a current detection circuit for detecting a regulator output current; a first amplifier circuit for generating a voltage error signal in response to a command output voltage level indicative of a target value of the regulator output voltage, and in response to the regulator output voltage detected by the voltage detection circuit; a second amplifier circuit for generating a current limiting signal in response to a command limit current level indicative of a limit value of the regulator output current, and in response to the regulator output current detected by the current detection circuit; means for controlling the regulator output current in response to a control current; a first transistor provided in a flow path for the control current, and being driven in response to the voltage error signal generated by the first amplifier circuit; and a second transistor provided in the flow path and connected in series with the first transistor, the second transistor being driven in response to the current limiting signal generated by the second amplifier circuit.