Patent ID: 7218082

Claim:
A voltage regulator receiving an input voltage and operative over a specified range of output capacitances at a load comprising: a control circuit responsive to load voltage for generating an error signal indicative of a difference thereof from a reference voltage; and an output stage responsive to the error signal for providing regulated voltage to the load, the output stage comprising: (a) a metal oxide semiconductor (MOS) pass transistor having a source and a drain coupled between an input voltage source and the load and having a gate for controlling voltage drop across the MOS pass transistor to provide the regulated voltage at the load; and (b) an input transistor circuit responsive to the error signal and coupled to control operation of the MOS pass transistor, the input transistor circuit presenting a shunt impedance to the error signal for values of output capacitances within a portion of the range of output capacitances so as to stabilize closed loop gain of the voltage regulator for output capacitances within that portion.