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Original question:

LM5143-Q1: 24Vout/30A

LM5143-Q1: Inductor value calculation is differs from the LM5143-Q1 quickstart calculator compared to using datasheet calculation

Michael Bozeman
Prodigy 40 points
Part Number: LM5143-Q1

The Quickstart calculator shows significant different inductor value compared to using datasheet equation 15 calculation.

Input: 48V      Output: 42V, 20A   Fsw = 500 KHZ

Buck Inductor value using equation 15: 

1.75uH

From the LM5143-Q1 quickstart calculator:

Ch1 Recommended Inductance: 10.5uH

The quickstart calculator:seems to be high.