Tool/software:
Dear experts,
Previously we were using a simple RC circuit (10K with 1uF) on the enable pin of a microcontroller. Right now, it's directly controlled by the TPS3897 like below. Of course, as the output is open-drain, we're using a 10K pull-up externally in another part of the schematic.
We did find that we're now a lot more sensitive for ESD events. Simply connecting the TagConnect cable (without programmer) or probing the enable pin with a multimeter, will result in a reset of the microcontroller. What would be the best approach to mitigate this?
I've tested for ESD sensitivity with a lighter and oscilloscope connected and observed that our RC based approach doesn't reset, while the new TPS based one does. Also, when floating (so not connected to the oscilloscope) our previous RC based approach did not reset on TagConnect connection, while the new TPS based one does.
Best regards,
Jochem
