naisare
Member level 2
I am using an n-depletion mosfet whose Vt is -0.5V.
This mos has to be in off condition during the normal operation of the chip.
So i connect the gate to -2V and when it has to be ON, I connect the gate to 0V.
It works fine. But the drain of this MOS is connected to supply voltage 5V.
Now, the voltage difference between the gate and drain is 7V during most of the chip operation time.
This creates the releability issue for this MOS. How to make this voltage difference lower(max 5V)
Since the source of the MOS is connected to output of the chip, I cant add any resistance between
the drain and supply voltage(functionality problem).
any help?
This mos has to be in off condition during the normal operation of the chip.
So i connect the gate to -2V and when it has to be ON, I connect the gate to 0V.
It works fine. But the drain of this MOS is connected to supply voltage 5V.
Now, the voltage difference between the gate and drain is 7V during most of the chip operation time.
This creates the releability issue for this MOS. How to make this voltage difference lower(max 5V)
Since the source of the MOS is connected to output of the chip, I cant add any resistance between
the drain and supply voltage(functionality problem).
any help?