Re: current through FET

blanko wrote:
I am currently using this FET to toggle the power to a device. The
device wants 3.3V.

http://www.zetex.com/3.0/pdf/ZXM61P03F.pdf

I have pin 1 (gate) going to my microcontroller, pin 2(source) going
to a 3.3V regulator, and pin 3 (drain) goes to the device I am
powering. The 3.3V regulator can provide 800 mA of output current
and I need all of that going through the FET to the device I am
powering. The problem is that when I take a look at the data***
(page 5 , 2nd graph) I will only be getting a few hundred milliamps.

Does anyone have a different part they can recommend or an easy way to
modify my current setup to allow for a higher current?


It is too weak and does not have a guaranteed Rdson at 3.3V, assuming that's the gate swing you have available. Check out this one:

http://www.zetex.com/3.0/pdf/ZXM66P02N8.pdf

--
Regards, Joerg

http://www.analogconsultants.com/
.

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