LT3480 failed in 60V transient test

Question

We use LT3480 as entry power from 6.8V to 36V, Transient to 60V input design, the output is 5V. The LT3480 burned in test. 
 
 How to prevent this? Thanks.

ADIApproved · Accepted Answer

Thanks for the information. 
 For operation at TJ &le; 125&deg;C, the absolute maximum voltage at VIN is 60V for up to 1 second during transient operation. When larger than 1 second, the overvoltage protection threshold value is 38V (typical value). 
 It is recommended to check the electrolytic capacitors at the input side. 
 
 Best regards, 
 Andrew)

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LT3480 failed in 60V transient test

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