Hi All,
I have searched the forums and google but to avail so far.
Is it possible to have latchup in a single MOSFET package? (In this case PMOS). All the explanation images have 2 mosfets next to each other and the latchup comes from their interaction through the substrate. But I figure it might be possible in single MOSFET packages depending on their construction. My voltages are well within the absolute maximums of the PMOS, although there is a large inductance on the drain side of the PMOS (but the body diode should take care of that).
My problem is I have a boost converter with a high side PMOS switch to turn it on and off by supplying or killing power to it. It is supposed to turn on for a minute every ten minutes but sometimes (every 2-4 weeks but fairly randomly) it will turn on and stay on until power is removed and reapplied. This made me think of latchup but I'm just wondering if it is possible or likely as I have no experience with it.
I have searched the forums and google but to avail so far.
Is it possible to have latchup in a single MOSFET package? (In this case PMOS). All the explanation images have 2 mosfets next to each other and the latchup comes from their interaction through the substrate. But I figure it might be possible in single MOSFET packages depending on their construction. My voltages are well within the absolute maximums of the PMOS, although there is a large inductance on the drain side of the PMOS (but the body diode should take care of that).
My problem is I have a boost converter with a high side PMOS switch to turn it on and off by supplying or killing power to it. It is supposed to turn on for a minute every ten minutes but sometimes (every 2-4 weeks but fairly randomly) it will turn on and stay on until power is removed and reapplied. This made me think of latchup but I'm just wondering if it is possible or likely as I have no experience with it.