Title :
Design of buck converter circuits operating in weak-inversion region
Author :
Ahn, Youngkook ; Kim, Kitae ; Nam, Hyunseok ; Choi, Youngkil ; Hyungdong Roh ; Roh, Hyungdong
Author_Institution :
Dept. of Electr. Eng., Hanyang Univ., Ansan
Abstract :
A 900-nA quiescent current buck converter is implemented in standard 0.25 mum CMOS technology. The controller´s analog subblocks are designed to operate in weak-inversion region to reduce quiescent current. It also implements internal compensation circuit to minimize external passive components. In order to reduce the size of an on-chip capacitor, the Miller effect is utilized. The measurement results show the successful operation of the DC-DC converter in extremely low quiescent current.
Keywords :
CMOS analogue integrated circuits; DC-DC power convertors; PWM power convertors; CMOS technology; DC-DC converter; Miller effect; buck converter circuits; current 900 nA; on-chip capacitor; quiescent current buck converter; size 0.25 mum; Buck converters; CMOS technology; Capacitors; Circuit noise; Circuit synthesis; Control systems; DC-DC power converters; Hysteresis; Pulse width modulation; Switching frequency;
Conference_Titel :
Design and Test Workshop, 2008. IDT 2008. 3rd International
Conference_Location :
Monastir
Print_ISBN :
978-1-4244-3479-4
Electronic_ISBN :
978-1-4244-3478-7
DOI :
10.1109/IDT.2008.4802476
