Title :
All CMOS Low Drop-Out Regulator with Large Supply Currents for System using Li-ion Battery
Author :
Honda, Takashi ; Suzuki, Yasoji ; Kawabata, Kentaro ; Murata, Shinichi
Author_Institution :
Tokai Univ., Kanagawa
Abstract :
In this paper, low drop-out (LDO) regulator for system using lithium-ion (Li-ion) battery is proposed. The new LDO consists of a current supply circuit (CSC) and a bias voltage generator (BVG). The new LDO can stability converts the battery voltage VDD from +3.3 V to +4.5 V into the reference voltage VREF of +3.0 V. The fluctuation rate DeltaV0 is less than about 1% and the power conversion efficiency eta is around 91% under the conditions of the load operating frequency f of 20 MHz, the draw currents I0 of 200 mA and the battery voltage VDD of +3.3 V. Furthermore, the proposal circuits execute very high-efficiency conversion and it is very suitable as LDO regulator for system using Li-ion battery
Keywords :
CMOS integrated circuits; lithium; power supply circuits; secondary cells; voltage regulators; 20 MHz; 200 mA; 3 V; 3.3 to 4.5 V; CMOS low drop-out regulator; Li; Li-ion battery; bias voltage generator; current supply circuit; Batteries; Circuit stability; Current supplies; Fluctuations; Frequency conversion; Power conversion; Proposals; Regulators; Time of arrival estimation; Voltage;
Conference_Titel :
Intelligent Signal Processing and Communications, 2006. ISPACS '06. International Symposium on
Conference_Location :
Yonago
Print_ISBN :
0-7803-9732-0
Electronic_ISBN :
0-7803-9733-9
DOI :
10.1109/ISPACS.2006.364880
