about the LDO regulator PSRR

[Markie]

I want to know what the goal to add ESR in simulation and what ESR will perfect?

We use a version of LDO "117" in our design, but if we don't add the cap on output term, it will wave.

If we don't want to add the input and output capacitor, we should use the chip of what PSRR?

does this pheno is associated with the PSRR?

Your help will be very sincere.

 

[lunren]

Normally, we add a large capacitance with ESR at the output of LDO to help the circuit be stable. This pheno is just a frequency compenstion issue.

 

[ambreesh]

Go to GATECH website look for Rincon mora and his publications. His PhD thesis is freely avilable.