Title :
LDO compensation strategy based on current buffer/amplifiers
Author :
Giustolisi, Gianluca ; Palumbo, Gaetano ; Spitale, Ester
Author_Institution :
Dipt. di Ing. Elettr. Elettron. e dei Sist., Univ. di Catania, Catania
Abstract :
In this communication, we propose a compensation procedure for LDO regulators which exploits both a current/buffer amplifier Miller compensation and a standard Miller compensation. The analysis shows how to design the compensation network in order to guarantee the stability for all the loading conditions. The results are then used to design a LDO regulator which is stable for a load current range of 4 orders of magnitude (from 10 muA to 100 mA) without requiring an external off-chip capacitor with ESR. Simulations in good agreement with the theoretical results are also shown.
Keywords :
amplifiers; buffer circuits; circuit stability; compensation; network synthesis; voltage regulators; LDO compensation strategy; current-buffer amplifier Miller compensation; low-drop out voltage regulators; Capacitance; Capacitors; Circuit simulation; Communication standards; Frequency; Power amplifiers; Regulators; Stability analysis; Transfer functions; Voltage;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
Electronic_ISBN :
978-1-4244-1342-3
DOI :
10.1109/ECCTD.2007.4529550
