LMR33620: LMR33620 ：Is it normal for voltage output to appear like this

OK,Thank you. I'll try first；

short FB5, with load

Yes, this problem happened on different IC, and about 20 samples have been burned.Next, I will first test the power on without connecting EN to see if VOUT has output.The inductance is changed to 10uH

Figure 1 shows the ac signal of the output voltage;FIG. 2 and FIG. 3 are SW signals.It can be seen that negative pressure is generated on SW. Is there any problem?Please advise, what other tests are required?What might be the problem?At present, the measuring bad piece found that VIN\SW\BOOT short circuit

Figure 1 is boot-sw, and figure 2 is sw-gnd.The capacitance of BOOT is MURATA GRM155R71H104KE14D.At present, I change the output inductance from 33uH to 10uH;The L1 inductance of the input terminal is cancelled.Anything wrong with the waveform?

But now there is another problem. When loaded, the boot-sw waveform is shown in the figure, and the voltage exceeds the 5.5v in the manual？

What causes this problem?Is accidental damage associated with this?

It is most likely how you are measuring Boot-SW.

If you are using a wired alligator clip to connect SW to the probe GND then that is a large loop that can pick up switching noise.

Are you able to probe with a spring type ground connector?  Something like

If you can probe that directly on the IC, that would be a more accurate boot-SW.