BTW, buck (in DIY style)
@ccs-hello As you know (probably better than me ;-) R2 680k, R1 150k are recommended by the data sheet
0.6V * (1 + 680/150) = 3.32V
R2 45.3k, R1 10k are selected by Onion's HW engineer (I wonder who is he/she?)
0.6V * (1 + 45.3/10) = 3.318V - so it's OK.
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