Resources for pmos and nmos ldo design

I am looking for a resource whether a book or paper that describes the design and tradeoffs of pmos vs nmos ldos and has an example design of at least one.

I have seen razavis analog mind papers and carusones analog textbook along with ricon moras books but none really fully describe the design flow and tradeoffs and have a worked out example although razavi does but i am looking for another treatment that discusses the tradeoffs between the nmos and pmos approaches with examples.

I guess I am wondering if there is a book that covers this more thoroughly or a paper or a conference tutorial. Any advice or suggestions ?

Thanks.