Hi, I am new to the forum and looking for some help. I have a circuit which I want to power up when a switch (operated by mechanically) is in Open state. I do not want to used relay.
State 1: Switch Open - Circuit Power ON
State 2: Switch Closed - Circuit Power Off
I considered P-channel MOSFET IRML5103, when the Gate is grounded State 1 activated. But for State 2, I need neg. supply at Gate which I do not have.
P-N-P transistor can do the job. But it have 0.7 voltage drop which is not acceptable as the unit run by 3V battery and the circuit can run upto 2.2 V.
I appreciate your suggestions.
Thanks
State 1: Switch Open - Circuit Power ON
State 2: Switch Closed - Circuit Power Off
I considered P-channel MOSFET IRML5103, when the Gate is grounded State 1 activated. But for State 2, I need neg. supply at Gate which I do not have.
P-N-P transistor can do the job. But it have 0.7 voltage drop which is not acceptable as the unit run by 3V battery and the circuit can run upto 2.2 V.
I appreciate your suggestions.
Thanks