Patent ID: 8692528

Claim:
A low dropout regulator, comprising: an input terminal for providing a variable input power; a reference circuit being electrically connected to the input terminal for receiving the input power; a power transfer element being electrically connected to the input terminal and an output terminal, wherein the power transfer element is receiving the input power from the input terminal and the power transfer element is controlling the power of an output power to the output terminal; a level regulating device being electrically connected to the output terminal and the reference circuit for receiving the input power and a first bias voltage provided by the reference circuit; a regulating circuit being electrically connected to the reference circuit, the output terminal, and the level regulating device for receiving a comparing bias voltage provided by the reference circuit and detecting a load change at the output terminal, and amplifying the load change to a first voltage for coupling to the level regulating device, and the regulating circuit further comprises: a second P-type MOSFET; a compensating capacitor, connected between a source of the second P-type MOSFET and a drain of the second P-type MOSFET; and a first N-type MOSFET comprising a first gate, a first drain and a first source, the first gate being connected to the reference circuit for receiving a second bias voltage, the first source being grounded, the first drain being connected to the level regulating device and the regulating circuit; wherein the level regulating device receives the first voltage and boosts the first voltage to a first voltage level, and transmits the first voltage level to the power transfer element, so that the power transfer element controls the power of the output power.