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TPS51312's output capacitors

Other Parts Discussed in Thread: TPS51312

Hi,

I calculate the value of  TPS51312's output capacitors.

The calculation formula is indicated Equation 4 and Equation 5 of Datasheet P12.

I think that As typical calculation formula is  L×I(square) = C×V(square) , so C = (L×I(square)) / V(square)

But, Datasheet indicated C = (L×I(square)) / 2×V .

Why is This calculation formula  2 × V ?