Tool/software:
Good afternoon,
I have a battery powered product ( 6 X AA, Max. Input voltage 9.6V) that carries two TPS62745 regulators for generating both 1.8V and 3.3V for the main MCU.
1.8V is for core supply while the 3V3 is used for powering the IO supply rails and other ICs.
I am having some devices returning from the field with damaged MCUs.
Failures on the MCUs are related to EOS damage on core power supply pin and IO power supply rail pins, this is on both 1.8V and 3.3V related pins.
If thinking (among other things) about overshooting happening at the output, I wanted to ask what condition/s could cause such overshoot to appear on the voltage regulator output?.
As comment, the devices might experience temporal power loss due to vibration event, causing a reset if the loss duration is high. This is due to vibration in battery compartment where the batteries will experience partial or brief disconnect.
Thanks for your kind attention.
Best regards,
