Hi,
My customer is evaluating LMR14020 on their system, abnormal behavior is being observed at high temperature.
The symptom is that regulation does not work at Ta=90℃~100℃(too low SW duty cycle) with no load.
It doesn't return to correct behavior even if Ta drops to room temperature and return by restarting VIN.
They use three LMR14020s which is different another output voltage, the symptom is seen on all rails and multiple boards.
So I think that this is not caused by abnormal sample.
I attach waveforms, for some reason, input current flows constantly.
LMR14020 abnormal behavior.xlsx
Has anyone seen such behavior?
Best Regards,
Kuramochi
