How to decide BW of error amp,position of Poles

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analog_cmos

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Hi
i am very puzzled for deciding of BW and error amplifier AC specs in LDO . Please give me some right direction.
 

BW is always decided by settling error but in case of LDO you have to consider pSRR of LDO.
 

Hi rampat
i didn't get your point. how to relate PSRR with error amp spec.
 

Till the UGF (unity gain frequency) of your amp, the power supply rejection would be good.

Position of poles must be such that, the closed loop LDO is stable.
 

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