Title :
A 93.5% efficiency, 400-mA current-mode dc-dc buck converter with watchdog functions
Author :
Ahn, Youngkook ; Nam, Hyunseok ; Roh, Jeongjin
Author_Institution :
Dept. of Electr. Eng., Hanyang Univ., Ansan, South Korea
Abstract :
A current-mode dc-dc buck converter was implemented in a standard 0.35- m 1-poly 6-metal 3.3-V CMOS technology. This paper proposes watchdog circuits in order to ensure the reliability and to improve the performance of dc-dc converters. The dc-dc converter systems can be protected from over-voltage, over-temperature, and over-current conditions. In addition to the protection from destructive conditions, a reversecurrent protection circuit is implemented to improve efficiency under light-load conditions. The maximum efficiency of the fabricated converter was 93.5%. The chip area is only 1.02 mm2.
Keywords :
CMOS integrated circuits; DC-DC power convertors; integrated circuit reliability; overcurrent protection; overvoltage protection; CMOS technology; chip area; current 400 mA; current-mode dc-dc buck converter; light-load conditions; over-current protection; over-temperature protection; over-voltage protection; reliability; reverse-current protection circuit; watchdog circuits; watchdog functions; Buck converters; CMOS technology; Condition monitoring; Consumer electronics; DC-DC power converters; Digital audio players; Energy management; Integrated circuit reliability; Protection; Telephony;
Conference_Titel :
SoC Design Conference (ISOCC), 2009 International
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5034-3
Electronic_ISBN :
978-1-4244-5035-0
DOI :
10.1109/SOCDC.2009.5423862
