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Micrel supervisor provides under-voltage monitoring

Posted: 03 May 2005 ?? ?Print Version ?Bookmark and Share

Keywords:mic2772? dual voltage supervisor? voltage supervisor? micrel semiconductor? micrel?

The MIC2772 dual voltage supervisor from Micrel Semiconductor is a dual power supply supervisor that provides under-voltage monitoring and power-on reset generation. According to the company, it may replace discrete voltage supervisors such as MIC1810, MIC1815, MIC809, MIC811 and MIC6315.

The two voltage supervisors are completely independent. Each functional block features an under-voltage detector, a delay-generator, and a de-bounced manual reset input. And a wide choice of voltage thresholds is available.

The reset output is asserted at power-on and any time the input voltage drops below the reference voltage. It remains asserted for the chosen timeout period after the input rises back above the threshold. Reset timeouts of 20-, 140- and 1,100ms (minimum) are available. A reset can be generated at any time by asserting the manual reset input, /MR. This input is internally de-bounced, and the reset output will remain active for the timeout period after the release of /MR. The /MR input can also be used to daisy-chain one or more of the MIC2772's supervisors onto existing power monitoring circuitry or other supervisors.

The MIC2772 is housed in a 2-by-2mm MLF package, which has a footprint smaller than that of a single SOT23 voltage supervisor.

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