TL720M05-Q1: Short Input Pulse 50...55V @ 15...25ns

Hi Martin,

Any exposure beyond the Recommended Operating Conditions introduces the potential degradation to a devices reliability. While you are correct that the Absolute Maximum Ratings are DC ratings for LDOs they are stress ratings only. We have not done sufficient pulse testing to ensure that a short pulse would not cause damage to the LDO; however, with a single 25 ns pulse risk of damage would be reduced as the amount of power dissipation internal to the LDO would be negligible. It should be noted that repeated exposure would increase the risk of damage. An external voltage clamp on Vin would provide protection from transients above the recommended operating maximum voltage of 42 V.

Very Respectfully,
Ryan