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Original question:

TPS62175 - Utilizing Enable pin for starting off at a set input voltage.

TPS62175: Variation of soft-start time

Markus Nabecker
Prodigy 230 points
Part Number: TPS62175

Dear support-team!

According the datasheet of TPS62175 the soft-start mechanism rises the output voltage with a typical rise time of 10 mV/us.

Is there the possibility to calculate/determine the worst-case rise time during startup procedure?

Is there any tolerances specified?

Kind regards,

Markus 

  • 0
    TI__Intellectual 1610 points

    Markus,

    I've reached out to the development team for more data on this and will let you know as soon as I get a response.

    Sincerely,

    -Matt

  • 0 in reply to Matthew Murdock
    TI__Intellectual 1610 points

    Markus,

    Unfortunately as this is not a specified electrical parameter for this device we cannot provide any specific performance tolerances. 

    In general with this type of delay, the variation can be as much as +/- 50% when you take into account part-to-part and temperature variation although you should rarely see any more than +/- 30% of variation.  Thus, the worst case rise time you may see could be as low as 5mV/us, but this would only occur on very few units and at elevated temperatures.

     

    Sincerely,

    -Matt