MOSFET – N-MOSFET and NPN Latching Switch Explained


I've seen many latching circuits through searching and reading some simple circuits.
Most use NPN+PNP combination, some bistable ones use two NPNs, some use DPDT relays.

Is the following circuit going to work as a latch?

proposed latching circuit

The idea is that after the momentary switch is pressed , load is supplied through N-Mosfet as well as the NPN transistor(which will hold the N-Mosfet gate high until a reset occurs in power)

(Sorry, had to hand-draw as the circuit editor doesn't let me make a circuit on mobile phone)

Best Answer


simulate this circuit – Schematic created using CircuitLab

Positive Feedback with high side latch with Set,Reset and POR cap.