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TPS548D22: one question about the soft start time

Oliver Ou
Intellectual 2845 points
Part Number: TPS548D22

Hi, 

From the Datasheet, the soft-start time of TPS548D22 is fixed. For examples, if RMODE_LOW=53.6k, the tss would be 3.6~5.2mS.

Customer wants to confirm if the 3.6~5.2mS is for all worse cases conditions, such as temperature, different output capacitor...

Can you help to confirm it?  

Also, The RMODE should use 1% resistor and would not effect the soft-start time, is it right?

Thanks a lot.

  • 0
    TI__Guru**** 191445 points
    Oliver,
    The datasheet specification gives minimum SS time of 3.6 msec and maximum time of 5.2 msec as you see. it is guaranteed over temperature. Make sure to follow the recommendation of of section 7.5.1.3.1 for the application work around for longer SS times. Please also use 1% resistor.