Load switch with FET - Is it really that simple?

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rprodrigues said:
Is this the maximum, the common or the threshold value that turns on the transistor?
Click to expand...
Look at the datasheet for any Mosfet. Its threshold Vgs is where its current is only 0.25mA so it is barely turned on.
Its on-resistance is spec'd at a very low resistance when its gate to source voltage is 10V or 4.5V or 3V.
 
audioguru said:
Look at the datasheet for any Mosfet. Its threshold Vgs is where its current is only 0.25mA so it is barely turned on.
Its on-resistance is spec'd at a very low resistance when its gate to source voltage is 10V or 4.5V or 3V.
Click to expand...


Ok!

The SI4401BDY can do the job.
The IRF7410 also, and its Vgs(ths) is of -0.6V with Rds(on) of 7m Ohm @ -4.5V (Vgs)!

So, I will go with the IRF7410!


Thank you guys!
 
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