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LMR33630-Q1: the different of the calculation of Cout value.

Part Number: LMR33630-Q1
Other Parts Discussed in Thread: LMR33630

Hi team,

My customer E-LEAD is asking the question that they notice if follow TI SLVA477B to calculate Cout(min). the formula will be:

If follow the datasheet of LMR33630-Q1. the formula will be:

I would like to know what different between two formula. As I know that the first one is calculated by roughly Cout's ΔQ = C x ΔV = ΔI x T = 1/2 x T/2 x ΔiL/2 to get the answer C = ΔiL / (8 x fs x ΔVo). but I can't understand the second one how to get the K ripple factor. Would you please help to explain it? thanks.