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November 10, 2009

TI launches quad power management supervisor family

Includes programmable delay and watchdog timer

By CBR Staff Writer

Texas Instruments (TI) has unveiled a new family of quad supply voltage supervisors with programmable delay and watchdog timer, which minimise board space in multi-rail power supply designs.

The company claims that 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%.

The TPS386000 family of devices offer an independent programmable delay input for each supervisor channel, which can be set from 1.25 ms to 10 seconds for power supply sequencing.

The TPS386000 devices operate with a very low quiescent current of 12 uA, which can minimise system power consumption. The devices are designed for applications such as telecom infrastructure, networking, server/storage, industrial and analog sequencing applications, the company said.

According to Texas Instruments, the features of the TPS386000 family include, integration of four supervisors into one IC with a threshold accuracy of 0.25% creates an integrated small device; programmable delay provides flexibility for use with processors and provides power supply sequencing support; the low quiescent current (12 uA typical) helps minimise power consumption in the design; and watchdog timer to enhance reliability in processor applications.

In addition, the new family provides several options for designers including, options for open-drain, push-pull, active high and active low reset outputs; and Window comparator on the fourth supervisor to be used for over voltage and under voltage detection or as a fifth supervisor for monitoring a negative voltage, the company added.

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