Patent ID: 8143868

Claim:
A low dropout (LDO) regulator comprising: an amplifier having a first terminal for receiving a reference signal, a second terminal for receiving a feedback signal, and an output terminal for outputting a comparison result according to the reference signal and the feedback signal; a pass transistor having an input terminal coupled to the output of the amplifier and an output terminal for generating an output current based on the comparison result of the amplifier; a voltage divider coupled to the pass transistor for generating the feedback signal according to the output current; a compensation network coupling the output of the pass transistor to a low-impedance node of the amplifier, the compensation network comprising a compensation capacitor and a variable resistor coupled to the compensation capacitor; and a control circuit coupled to the input of the pass transistor and the variable resistor for controlling resistance of the variable resistor according to the output current of the pass transistor.