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How to prevent a switch from been turned on by heavy undershoots?

April 26, 2017heavy Switch turned undershoots

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How to prevent a switch from been turned on by heavy undershoots?

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Undershoot below -0.7V will turn on the switch when it is off, if the switch does not have an undershoot-protection function. A common approach to prevent the switch from being turned on is to add a Schottky diode with 0.4V forwarding drop in reversal direction between the input and ground of the switch.