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TPS2491: OUT undershoot

Kazuhiko Hirano
Genius 14908 points
Part Number: TPS2491
Other Parts Discussed in Thread: TPS2490

Hello,

 

The datasheet 6.1 note (2) says “OUT will withstand transients to -2V for 1ms or less.

On my customer board, the OUT transients to -4V for ~10us.

Could this damage TPS2490 or should this be OK?

 

Best regards,

 

K.Hirano

  • 0
    TI__Guru** 105361 points

    Hi Hirano,

    I would suggest to use a schottky diode at the output to clamp the voltage within -2V spec.

    Let us know the system voltage and max load current details to suggest part number for the schottky diode

    Best Regards, Rakesh