which formula used to calculate resistor value for specific Vout in Evaluation board DC2279A.(R3,R4,R5,R6,R7,R8)
What could be value of R9(OPT) to set vout = 0.5
Please refer to page 9-10 of LT3088 datasheet and see the application information part.
You can also see table 1: on page 9 for the equivalent Rset for a specific Vout.
Basically, the formula is Vout = Iset x Rset ; wherein Iset is equal to 50uA (reference current that flows on SET pin).
*Take Note that in DC2279A demo board, there is a parallel resistor(R1:301kohms) on R9(user select resistor) as well in all other resistors (R3-R8).