over current protection circuit of LDO

[yxk]

over current protection circuit

Hi gays:
I have a question about LDO over current protection. the question is following:

When the current of output transistor is to high, the protection transistor (PMOS) will pull up the gate of the power transistor to high voltage and close the power transistor. but the current flows through the protection transistor and the ERROR AMP second stage's transistor (NMOS) is too high.(about 5mA). I thank the current is too high to flow through the second stage of the ERROR AMP.

should i power down the AMP when over current protection circuit is on? if yes, how can I do?

thanks everyone !

 

[shaq]

current protection circuit

yes, you can control the tail current of the EA to turn on or off when the over current is issued.