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Quad-voltage supervisors pack programmable delay

Posted: 16 Nov 2009 ?? ?Print Version ?Bookmark and Share

Keywords:voltage supervisor? programmable delay? watchdog timer?

TPS386000 SVS

Texas Instruments Inc. introduces a family of quad supply voltage supervisors (SVS) that feature programmable delay and watchdog timer. Minimizing board space in multi-rail power supply designs, the TPS386000, TPS386020, TPS386040 and TPS386060 supervisors can monitor four power rails that are greater than 0.4V with a threshold accuracy of 0.25 percent. This accuracy combined with an integrated watchdog timer provides system reliability for processor-based applications.

The TPS386000 family of devices offers an independent programmable delay input for each supervisor channel, which can be set from 1.25ms to 10s for power supply sequencing. They operate with a very low quiescent current of 12?A, minimizing system power use. They are designed for applications such as telecom infrastructure, networking, server/storage, industrial and analog sequencing applications.

The devices integrate four supervisors into one IC with a threshold accuracy of 0.25 percent creating a highly integrated, accurate and small device to help minimize cost and board space. The programmable delay provides flexibility for use with a wide range of processors and provides power supply sequencing support. Also, the low quiescent current of 12?A typical helps minimize power consumption while the watchdog timer enhances reliability in processor applications.

Several options give designers flexibility to meet their system's power requirements: options for open-drain; push-pull; and active high and active low reset outputs. Also the window comparator on the fourth supervisor can be used for over voltage and under voltage detection or as a fifth supervisor for monitoring a negative voltage.

For application notes on voltage supervisors click here.

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