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LM5158: Selecting Inductor Value for DCM mode operation for LM5157 / LM5158

Part Number: LM5158

My application is Vin=5 & Vout =24V / 20mA. Webench suggests using LM5158 in DCM mode as highest efficient design & lowest footprint. Please share how to calculate inductor value.

I believe that in general, the inductor value should be greater than Critical Inductance value to guarantee CCM. Does this mean the Maximum inductor value should be the critical inductance value to guarantee DCM mode?