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LM76002: How to choose a perpor inductor

Vincent Chen64988
Expert 4480 points
Part Number: LM76002

Hi Team,

My customer is designing LM76002 in his SCH and run a WEBENCH simulation which shows the recommended inductance is 15uH based on VIn=10V~36V, Vout=5V, Iout=2.5A, Fsw=500KHz.

https://webench.ti.com/power-designer/switching-regulator/customize/761?VinMin=10&VinMax=36&O1V=5&O1I=2.5&base_pn=LM76002&AppType=None&Flavor=None&op_TA=30&origin=pf_panel&lang_chosen=en-US&optfactor=3&Topology=Buck&flavor=None&VoltageOption=None

But in datasheet, recommended inductance is 6.8uF. 

1. Is it OK if customer choose 6.8uH inductor in his application?

2. Why the simulation result is difference from datasheet's suggested value?

Thanks a lot.

Vincent Chen