Patent ID: 7477092

Claim:
A voltage generation circuit, comprising: a charge pump circuit that receives an input voltage and outputs a regulated output voltage at an output terminal, the regulated output voltage being greater than the input voltage, and the charge pump circuit having a control terminal; and a first voltage output circuit operatively connected to the output terminal of said charge pump circuit, said first voltage output circuit producing a first output voltage that is less than the regulated output voltage, said first voltage output circuit being configured to operate in accordance with a first control signal to reduce DC power consumption by said first voltage output circuit when the first output voltage is at the desired level, wherein said first voltage output circuit comprises: a first reference voltage circuit configured to produce a first reference voltage; a first current mirror circuit operative to produce the first output voltage, the voltage of the first output voltage being dependent on the first reference voltage; and a switch operatively connected with said reference voltage circuit to disable production of the first reference voltage after the first output voltage reaches the first reference voltage, thereby reducing power consumption by said first voltage output circuit.