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LM5140-Q1: LM5140-Q1 output inductor hot

Part Number: LM5140-Q1
Other Parts Discussed in Thread: LM5143-Q1


I designed a power solution---24V input, 12V/20A and 5V/5A dual output, the design is below, about 12V output,

1.change  current sense resistor from 0.004 to 0.002

2. change inductor from 10uh to 0.68uh with higher Isat, 

3. set up switch frequency 440KHz

but I found the current was very hot without load when power up.