Hello everyone,
I have to switch the power supply of a sensor between 12 or 5v regarding:
- One of the regulators (12v or 5v) can be switched off.
- The voltage drop across the switch must be minimal.
- Maximum of 100mA of load.
- 3.3v logic control.
- Must consume very little power.
- Cheap.
I think the best/cheap solution for doing this is using high-side p-channel fet's, but the body diodes of the fet's will cause reverse conduction when the 12V is selected to power the sensor and the 5v regulator is on.
I've made this circuit to prevent this, it will work as well?
I have to switch the power supply of a sensor between 12 or 5v regarding:
- One of the regulators (12v or 5v) can be switched off.
- The voltage drop across the switch must be minimal.
- Maximum of 100mA of load.
- 3.3v logic control.
- Must consume very little power.
- Cheap.
I think the best/cheap solution for doing this is using high-side p-channel fet's, but the body diodes of the fet's will cause reverse conduction when the 12V is selected to power the sensor and the 5v regulator is on.
I've made this circuit to prevent this, it will work as well?