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TPS1663: Tdvdt Calculation

Part Number: TPS1663

Hi, team members.

About Tdvdt calculated by the equation "tdVdT = 20.8 x 10 ^ 3 x V (IN) x C (dVdT)" described in the data sheet P14.

Is it the rise time when the output voltage goes from 10 to 90% or the rise time when the output voltage goes from 0 to 100%?