Title :
High-voltage tolerant watchdog comparator in a low-voltage CMOS technology
Author :
Potanin, Vladislav Y. ; Potanina, Elena E.
Author_Institution :
Nat. Semicond. Corp., Santa Clara, CA, USA
Abstract :
A watchdog comparator is presented that is tolerant of supply voltages significantly higher than the process limit for individual CMOS transistors. The circuit demonstrates very low current consumption, and has a fast dynamic response. The described circuit was implemented in the battery charger block of a power management IC for cellular phones. The implemented watchdog comparator is tolerant of input voltages up to 12 V and passes operational life and reliability tests. Extensive evaluation under various start-up conditions shows circuit compliance to contradictory specification parameters. Simulation and measurement data for various power-up transient conditions are presented.
Keywords :
CMOS integrated circuits; cellular radio; comparators (circuits); electric potential; integrated circuit reliability; mobile handsets; power electronics; battery charge block; cellular phones; current consumption; dynamic response; high-voltage tolerant watchdog comparator; low-voltage CMOS technology; operational life tests; power management IC; power-up transient conditions; reliability tests; supply voltages; Battery charge measurement; Battery management systems; CMOS process; CMOS technology; Cellular phones; Circuit simulation; Circuit testing; Energy management; Life testing; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 2004. ICECS 2004. Proceedings of the 2004 11th IEEE International Conference on
Print_ISBN :
0-7803-8715-5
DOI :
10.1109/ICECS.2004.1399670
