bmalbusca
Newbie level 5

I'm using the mosfet circuit presented below to switch the power supply in the PCB (low power). The problem is the current consumption during the ON state of P1, which is 0.5mA to keep-on the pmos (The current nmos drains is controlled by the resistor R). The current is controlled by the resistor R. However, due to the noise levels, I'm not able to increase the value of that resistor in order to decrease the current drain (I tried experimentally other values such 15k, 20k, ...). I began to design a circuit to disconnect the pull-up using pnp when PMOS is turned on, but the circuit became complex and possibly more current consuming. Maybe there is a clever way to do it.
Resuming the circuit functioning: S1 and S2 signals can be used to drive the P1 pmos. When S1 or S2 are both high, the pmos' gate is set to 0V, and the pmos turn on. When S1 and S2 are both low, 5V appears at the pmos' gate trough R pull-up.
Resuming the circuit functioning: S1 and S2 signals can be used to drive the P1 pmos. When S1 or S2 are both high, the pmos' gate is set to 0V, and the pmos turn on. When S1 and S2 are both low, 5V appears at the pmos' gate trough R pull-up.
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