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LMZ14203: which is the minimum value of the Soft-Start capacitor Css

Richard Staebler
Prodigy 50 points

Hallo,

which is the minimum value of the Soft-Start capacitor (Css) on Pin5 for LMZ14203TZ-ADJ .
In the Datasheet I read this:
Use of a 0.022μF capacitor results in 2.2 msec soft-start duration. This is recommended as a minimum value.

Can I use a 1nF capacitor for a very fast Soft-Start.
Would a 1nF capacitor take damage of the LMZ14203TZ-ADJ??

Best regards
Richard Stäbler

  • 0
    TI__Expert 4365 points

    Hello Richard,

    There will not be any damage to the module if you use a lower value of capacitor than 0.022uF, however there is the possibility of output voltage overshoot when using a smaller capacitance value.  The amount of overshhot will depend on the input and output conditions as well as the total output capacitance value. If you need us to test for you plase send us your operating range / condutions for the test.

    Alan Martin