Why does Miller Compensation affect LDO PSRR?

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venkatraman.swami

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How and why does MILLER compensation affection the PSRR of an LDO?
 

In miller compensation, one adds additional cap. between drain and gate of the power Mosfet. This cap. in series with the stabilizing cap. (or simply the cgs cap.) of the power Mosfet forms a AC path from power supply to the LDO output. Hence effecting the PSR of LDO.
 

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