• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 23 subscribers
  • Views 298 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS57060-Q1 70V Transient Response

Austin Tanner
Expert 8255 points

Hello,

I want to use this DC/DC for a 48V-to-12V step-down application. The 48V input will 99.9% of the time be <58V but we have a very specific 70 transient test to survive shown in the attached figure. Since the part is rated for Abs Max Vin=60V, I am concerned that it would not survive this test. Do you think the part would survive this 70V transient test?

Thank-you!

  • 0
    TI__Genius 9615 points
    Hi, Austin,
    Many thanks for your interest in this product. Any designs should obey the RECOMMENDED operating conditions (here found in Electrical Characteristics), which for this part would be 60V max. The ABSOLUTE maximum ratings define a range where no immediate damage is expected, but datasheet parameters may not hold true any more, increased leakage and potentially accellerated aging has to be expected. Anything beyond ABS max rating may cause permanent damage.
    I did not see an attachment and don't know which transient-durations are expected in that test, but the abs max specification for the switch-node (PH), gives an idea of which transients are considered as such, hence nano-second-range maximum (e.g. during a spike on the switchnode when toggling).
    So I'm afraid, but external protection is required in case the voltage exceeds 65V, and if the duration is longer than some hundreds of nanoseconds, protection is required for voltages higher than 60V.
    Best regards,
    Frank