Patent ID: 7511464

Claim:
A voltage regulator, comprising: a dividing circuit connected with an output terminal, for dividing an output voltage; an amplifying circuit to which a dividing voltage from the dividing circuit and a reference voltage are inputted, for generating a signal for controlling an output circuit; a detecting circuit connected with a voltage input terminal, for detecting a rise speed of an input voltage; a first output current detecting circuit connected with an output of the amplifying circuit, for detecting an output current at the output terminal; a first output current limiting circuit connected with the detecting circuit and the first output current detecting circuit, for controlling the output circuit; a second output current detecting circuit connected with the output of the amplifying circuit, for detecting the output current at the output terminal; and a second output current limiting circuit connected with the second output current detecting circuit, for controlling the output circuit, wherein: the first output current limiting circuit has a first output current limit value; the second output current limiting circuit has a second output current limit value lower than the first output current limit value; and the detecting circuit enables operation of the first output current limiting circuit when the rise speed of the input voltage is rapid.