Title :
A voltage-mode DC-DC converter with enhanced transient responses
Author :
Jang, Kichang ; Choi, Jungsoo ; Park, Chulkyu ; Choi, Joongho
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Seoul, Seoul, South Korea
Abstract :
This paper presents the design technique using a charge-pump circuit for enhancing the transient responses of a voltage-mode DC-DC converter. Although there is no need for additional sensing circuitry for a voltage-mode DC-DC converter, extensive frequency compensation scheme should be critical for stable operations. This converter shows slow transient responses with respect to variations of input voltage and load current. In this paper, a charge-pump circuit is added to the compensating circuit for faster responses. The proposed method is verified in hardware implementation where the voltage-mode DC-DC buck converter is fabricated in a 0.35-um CMOS technology.
Keywords :
CMOS integrated circuits; DC-DC power convertors; charge pump circuits; transient response; CMOS technology; charge-pump circuit; frequency compensation; size 0.35 mum; transient response; voltage-mode DC-DC buck converter; CMOS integrated circuits; Charge pumps; Hardware; Pulse width modulation; Transfer functions; Transient analysis; Voltage measurement;
Conference_Titel :
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0218-0
DOI :
10.1109/ISCAS.2012.6272209
