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TPS63900: Inductor Current Selection Equation

Part Number: TPS63900

Hello,

While reviewing the data sheet there is an equation to determine inductor current but I’m a little confused,  The regulator frequency is a function of load current,  at 2uA load this is a frequency of about 20hz from chart 8.3. However substituting the component values  Vin=1.8, Vout=3.3, L=2.2uH, f=20 @2uA in the following equations  Ipeak = (4.12uA + 16875A)  which doesn’t make sense unless L units should be uA?  Can you provide any clarification on these?  Thank you!