Hi spanandiyer1979,

I don´t know your technical/theoretical background - therefore, please excuse me if I tell you something what you already know.
Searching in the internet you certainly will find a lot of papers, contributions and documents about LDO´s.
However, my recommendation is, before starting with LDO design to become familiar with the basics of control theory.

A LDO is a system with feedback, which is designed based on certain rules derived from control theory. At least you should know what the following terms mean (hopefully I didn´t forget something):

Positive/negative feedback, stability, loop gain, stability/phase margin,
Bode and Nyquist diagrams, pole/zero distribution and their relationship to the dynamic properties of a system,....

Regards and good luck.
Buddypoor

Hello,

I´m not sure if the following document link contains some interesting information for you; it´s a 109 page description of an LDO design process.

http://www.micrel.com/_PDF/other/LDOBk.pdf

Regards
LvW

LDO regulators can be very tough to design.  The biggest issue is usually that you need to be stable for a huge range of loads while not consuming much power in your error amp.

You also have to take care of reliability with good layout for latchup and ESD immunity.