I'm using this IC (https://www2.mouser.com/datasheet/2/609/ADM1270-878589.pdf) to control the current and the voltage on some of the outputs of a PCB that controls the power to other PCBs, which have several sensitive components like microcontrollers and other semiconductors.
This IC controls the gate of a pmos. I'm thinking about using this MOSFET (https://www2.mouser.com/datasheet/2/389/sts10p4llf6-956791.pdf).
The IC gate current is very low (GATE Pull-Down (On) Current = 25 uA), and the MOSFET gate has a fair amount of charge (Total gate charge = 34nC), so I did the math: Q=it => t= 1.36 ms, which is the amount of time to switch the MOSFET without any resistor (I think...). If I use a resistance to limit the current the time to switch will increase even more.
My doubts are:
- Are my assumptions/calculations correct?
- How long do I have before my sensitive components get fried? Is 2 ms of delay on my protection IC good enough?
My objective is not only to protect singular components, but also to know which subsystems are functional and to be able to isolate the damage, if it can't be prevented completely.
(Context) I'm a Mechanical Engineering student doing an electronics project in an automotive context.
Thank you in advance for the help!