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

fYear

2009

Firstpage

428

Lastpage

431

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/SOCDC.2009.5423862

Filename

5423862