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negative supply load switch

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mystery

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negative supply switch

Hi,

I want to implement a negative supply load switch with using p and n channel mosfet. The switch will be controlled with 3.3V microcontroller.

How may i design this circuit?

thanks
 

J

jiangwp

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You want to impliment circuit that is called low side driver.

There is many structure about the type circuit in the industry.

You can google it . and examine the datasheet to build up your circuit.
 

mystery

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negative supply switching

Actually What i want is not a low side driver.
A low side driver switches the ground. The load is energized with the supply.
I have load, which is normaly connected to the ground, and i want to switch the negative supply with using a 3.3V microcontroller I/O.

Added after 1 hours 24 minutes:

Ok I've found the solution[/img]
 

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