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Battery monitor consumes 5pA

Posted: 23 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:micrel? battery monitor/comparator? mic845?

Micrel Inc. unveiled a micro-power battery monitor/comparator for sensing and indicating end of life in Lithium batteries. The new MIC845 chip features an extremely low supply current and draws virtually zero current from a battery or monitored voltage source.

"Finding out your battery died seemingly with little warning is an unpleasant experience we've all had," said Bob Whelton, executive vice president of operations at Micrel. "Consumers expect to be warned well beforehand that their battery is reaching end of life. This is even more important in the server environment, where mission critical data is held in battery-supported memory. Loss or corruption of this critical information can virtually cripple an idling back-up system, rending it ineffective in its crucial no-down-time role."

The MIC845 fulfills the UL's isolation requirements between primary batteries and power sources while consuming a 5pA of sense current from the battery. Operating from just a 1.5?A supply current, the MIC845 requires no resistor divider for proper voltage level detection.

Housed in SC-70 packaging to minimize PCB space requirements, the MIC845 is currently available in volume quantities with pricing starting at 40 cents for 1,000-unit quantities.

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