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?

Thanks!

-Mike
Maybe i'm over looking something, I don't see a problem unless your
micro is not swinging to the rail?
What I would worry about how ever is switching time. if it's not
driving something at a constant pulse rate i think you should ok how
ever, if you are doing such a process, a Gate driver maybe in order
to force it on/off faster.
THat's just my opinion, that is why I like experimenting with components before putting them in full use.

I will say how ever, Getting a lower (Ron) might be a better way to
go.. I kind of think that unit's on resistance for switching is kind of
high even at 0.35 ohms.


http://webpages.charter.net/jamie_5";

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