LDO transient response

[sammyboy102889]

how can i improve the stability of my LDO circuit. i have used two opamps. a twostage op amp and a differential. i also used an enhanced active feedback and miller compensation.

please help. thanks

 

[cmancuso]

Can you post a schematic or circuit diagram please?

 

[leehying]

Hi,
What about your load current, and output cap..
LEE

 

[sammyboy102889]

Hi,
What about your load current, and output cap..
LEE

i am trying to design a LDO without and output cap.

---------- Post added at 20:46 ---------- Previous post was at 20:39 ----------

Can you post a schematic or circuit diagram please?

here is my schematic:


my 1st stage:


2nd stage:


thanks.

 

[leehying]

Hi,
I do not think it can handle the load transient, even you figure out the stability issue.

 

[LvW]

I am trying to design a LDO without and output cap.

Simple question: WHY?

 

[sammyboy102889]

Hi,
I do not think it can handle the load transient, even you figure out the stability issue.

why? is there something wrong with my circuit?

---------- Post added at 22:08 ---------- Previous post was at 22:06 ----------

its for my thesis. a requirement for grad. it would also be nice. designing and LDO w/out an output cap.