Noobie: power a sensor off an I/O?

[jwsusa 0]

mp3h6115ac6u is a 16psi pressure sensor rated 3.3v, 8ma, with just Vs, Vout and GND connections.

 

I am heading to ultra low power operation, where the sensor only needs to be activated every few days, and then only for 50ms once every 10 minutes.

 

So I want to be able to turn off the sensor in between measurements.

 

For the short term, can I just supply voltage to the sensor by turning on a IO?

 

I guess long term I will need to use the IO to activate a switched LDO so I can ensure I have a stable supply voltage to have calibrated results?

 

Very early in my learning curve!

[cde 334]

8ma, you could do it straight from a output pin. You might want to add a resistor, but even without one. At 8ma, you won't have any noticeable voltage drop, so it will be as stable as your msp's v+ is.