Title :
Frequency compensation techniques for op-amps and LDOs: A tutorial overview
Author :
Garimella, Annajirao ; Furth, Paul M.
Author_Institution :
Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA
Abstract :
Today´s op-amp is not just a stand-alone IC, rather it is more custom and complex, catering the needs of highly integrated SoC. Tighter line and load regulation, low quiescent current operation, capacitor-free and wide-range output capacitor specifications are some of the contradicting requirements in an LDO, which drive newer topologies and newer frequency compensation techniques. The objective of this paper is to provide a tutorial treatment of some of the basics and recent advances in frequency compensation. Transistor level implementation of efficient LHP zero techniques and design examples are detailed.
Keywords :
operational amplifiers; voltage regulators; LDO; efficient LHP zero techniques; frequency compensation techniques; op-amps; transistor level implementation;
Conference_Titel :
Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-61284-856-3
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2011.6026315
