G
galapogos
Hi,
I'm trying to use a TP0610 P-channel enhancement mode FET to control
the switching on/off of a device's Vcc with an MCU's I/O pin. The
problem here is that the device's Vcc is 5.0V while my MCU supplies
3.3V only. I'm wondering if a Vgs of 3.3V will be sufficient to turn on
the FET? According to the datasheet, Vt(min) = -1.0V and Vt(max) =
-2.4V(condition:Vgs = Vds, Id = -1mA). Does that mean that it takes
anywhere from 2.6V to 4.0V at the gate to turn the FET on? If so, 3.3V
isn't very safe is it?
Also, how do I calculate how much current I should supply from my MCU
to my gate(hence calculating that series resistor value)? My device
will have a max current of ~30mA and my MCU supplies a max of 2mA.
Thanks!
I'm trying to use a TP0610 P-channel enhancement mode FET to control
the switching on/off of a device's Vcc with an MCU's I/O pin. The
problem here is that the device's Vcc is 5.0V while my MCU supplies
3.3V only. I'm wondering if a Vgs of 3.3V will be sufficient to turn on
the FET? According to the datasheet, Vt(min) = -1.0V and Vt(max) =
-2.4V(condition:Vgs = Vds, Id = -1mA). Does that mean that it takes
anywhere from 2.6V to 4.0V at the gate to turn the FET on? If so, 3.3V
isn't very safe is it?
Also, how do I calculate how much current I should supply from my MCU
to my gate(hence calculating that series resistor value)? My device
will have a max current of ~30mA and my MCU supplies a max of 2mA.
Thanks!