In my circuit I have a high-side PMOS to control a load. Its drain is connected to the main voltage rail (between 3.0V - 4.0V), its source to the load. Now I want to switch the PMOS with a uC pin (with HIGH a bit lower than the supply rail's voltage). Since the PMOS should be on when the pin is driven low, I need an inverter.
The first thing that came into my mind was a simple NMOS-inverter with a 10k pull-up. An alternative would be a CMOS inverter with an NMOS and a PMOS. The CMOS inverter has the advantage of only drawing current when changing states. So it seems like the CMOS option is better for low-power applications. Since I don't care about component count/size or switching speed, is a CMOS inverter better? I ask because lots of people use simple NMOS inverters or even N-BJT inverters, but I haven't seen a circuit using a CMOS inverter.
The first thing that came into my mind was a simple NMOS-inverter with a 10k pull-up. An alternative would be a CMOS inverter with an NMOS and a PMOS. The CMOS inverter has the advantage of only drawing current when changing states. So it seems like the CMOS option is better for low-power applications. Since I don't care about component count/size or switching speed, is a CMOS inverter better? I ask because lots of people use simple NMOS inverters or even N-BJT inverters, but I haven't seen a circuit using a CMOS inverter.