A linear regulator for outputting a regulated voltage with improved
rejection of high frequency components in the power supply. The linear
regulator includes an op-amp connected in a linear feedback loop to drive
first and second current legs based on a voltage reference. An output
driver includes a load capacitance across which the regulated voltage is
output, and further includes a ratio-driven current mirror having a
mirror ratio defined by relative sizes of active devices in the first and
second current legs, as compared with relative sizes of active devices in
the output driver. Because the output driver and its load capacitance are
provided outside the linear feedback loop, large values for the load
capacitance can be selected without destabilization of the feedback loop.
Thus, the value of the load capacitance can be chosen at any value
according to frequency rejection requirements.