Title :
Multi-mode CMOS low dropout voltage regulator for GSM handsets
Author :
Barber, T.J., Jr. ; Ho, S. ; Ferguson, P., Jr.
Author_Institution :
Analog Devices Inc., Wilmington, MA, USA
Abstract :
This paper presents a 1.8 V 400 mA multi-mode low dropout voltage regulator designed in a 0.25 /spl mu/m CMOS process. Multiple power modes are used to increase the efficiency of the regulator under both heavy and light loads. Under heavy loads, a high power driver with dynamic current bias and a DC/DC converter are used to improve the efficiency from 50% to 75%. Under light loads, a low power driver is used to improve the efficiency from 0.2% to 43.5%.
Keywords :
CMOS analogue integrated circuits; DC-DC power convertors; cellular radio; driver circuits; power integrated circuits; telecommunication power supplies; telephone sets; voltage regulators; 0.25 micron; 1.8 V; 400 mA; 43.5 percent; 75 percent; CMOS; DC/DC converter; GSM handsets; dynamic current bias; heavy loads; high power driver; light loads; low power driver; multi-mode low dropout voltage regulator; Batteries; CMOS process; Capacitors; Driver circuits; Engines; GSM; Low voltage; Power supplies; Regulators; Telephone sets;
Conference_Titel :
VLSI Circuits Digest of Technical Papers, 2002. Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-7310-3
DOI :
10.1109/VLSIC.2002.1015106
