How can the residual voltage at the LT1161 output be handled when the device is turned off to prevent unintentional MOSFET switching On?

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Accepted Answer

To handle residual voltage at the LT1161 output when it is turned off—and to prevent unintentional MOSFET activation—a pull-down resistor can be used. This technique involves connecting a resistor, typically between 10kΩ and 100kΩ, between the MOSFET gate and source. The purpose of this resistor is to discharge any residual voltage at the gate, ensuring that the gate voltage reliably drops to 0V when the LT1161 output is inactive.

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LT1161: FAQ