Patent ID: 8779736

Claim:
A compensated voltage regulator comprising: a first amplifier having a first input for receiving a reference voltage, a second input, and an output; a second amplifier having an input coupled to the output of the first amplifier, and an output; a pass transistor having a control terminal coupled to the output of the second amplifier, and a current path; a first current mirror having an input coupled to the current path of the pass transistor, and an output; a second current mirror having an input coupled to the current path of the pass transistor, and an output; a variable impedance compensation network having a first terminal coupled to the input of the first current mirror, a second terminal coupled to the output of the second current mirror, and a third terminal coupled to the input of the second amplifier; and a feedback network in the current path of the output of the first current mirror, and coupled to the second input of the first amplifier, wherein the variable impedance comprises a capacitor and a variable resistor in series, and wherein the variable resistor comprises a diode configured to receive a replica current proportional to a load current, and wherein the voltage regulator comprises a linear voltage regulator, and wherein the first current mirror has a source terminal coupled to VDD, and the second current mirror has a source terminal coupled to ground.