Tool/software:
Hi
I am investing an issue on our prototype board where the eFuse is failing sometimes short circuit (well measuring 7ohms on DVM in both directions) the UVLO is not operating and the device just passed input to output. We are not sure what is causing the device to blow in this way and are concerned it is able to blow in this way as it is a protection device so one would assume short not fail s/c?
This is our schematic the downstream load is a 3v3 SM regulator supplying an un programmed arm processor taking about 60mA so very lightly loaded. We have 10uF cap on the input to the upstream SM PSU circuit.
Any help much appreciated