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MOSFET Switch not Working

vinit2100

Oct 21, 2013
100
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Oct 21, 2013
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Hi, I designed a P-Channel MOSFET circuit for switching 6.5V and 0V to rail named VOUT. When Q5 becomes ON (3.3V) VCE= .085V and this is further divided to .0425v to the gate of Q6. and I am getting 6.5V

When Q5 becomes OFF (0V) VCE= 5.876V and this is further divided to 2.941V to the gate of Q6 and I am expectiving a value closer to 0 V but still i am getting 6.5V. :confused:

Please help me in this regard
 

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BobK

Jan 5, 2010
7,682
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Jan 5, 2010
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Take out R18 and R22 and connect the gate directly to the collector of Q5.

Also, you must have some load on the drain of Q6 in order to make a measurement of it's voltage meaningful.


Bob
 
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