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Linear unrolls undervoltage, overvoltage monitor

Posted: 19 Dec 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Linear Technology? LTC2912? undervoltage? overvoltage? space-conscious applications?

Linear Technology Corp. has developed the LTC2912, a single undervoltage and overvoltage monitor for space-conscious applications. Housed in a tiny 3-by-2mm DFN package, the voltage monitoring inputs of the LTC2912 include filtering to reject brief glitches, thus ensuring reliable reset operation without false or noisy triggering.

Programmed by external resistors, the undervoltage and overvoltage trip thresholds have a guaranteed 1.5 percent threshold accuracy of monitored voltages over temperature, and give users the flexibility to tailor the IC to their specific voltage levels.

The LTC2912 features an adjustable timer to define the duration of the undervoltage and overvoltage reset outputs, which function independently of each other. The IC is offered in three output configurations: LTC2912-1 has a latch control for the overvoltage output; the LTC2912-2 has an undervoltage and overvoltage output disable for margining applications; the LTC2913-3 is identical to the LTC2912-1 but provides a noninverting overvoltage output.

While the LTC2912 operates directly from 2.3V to 6V supplies, an internal shunt regulator allows for operation with higher voltages such as 12-, 24- and 48V, making it suitable for systems with various voltage levels that also require reliable and accurate voltage monitoring, such as telecom/network equipment, storage servers, desktop and notebook computers. In addition to the single undervoltage and overvoltage monitor, dual and quad versions, the LTC2913 and LTC2914, respectively, are also available.

The LTC2912 is offered in 8-lead ThinSOT and 3-by-2mm DFN packages and is specified over the commercial and industrial temperature ranges. The LTC2912 is priced at $1.45 each for 1,000-piece quantities.

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