It took a bit longer than expected but I had a go at testing the board.
So far it performs really nice.
Power consumption
Idle load @ 35VIN, no output connected = 17mA
PowerIn @ 35VIN, 3V3 3A Out = 35V x 470mA = 16,45W
PowerOut @ 35VIN, 3V3 3A Out = 3,3V x 3A = 9,9W
Ploss = 16,45W - 9,9W = 6,55W
n = ~60%
Temperature LT3080 @ 25C Amb
@ 35VIN, 3V3 3A Out:
Temp 1 = 0,63V
Temp 2 = 0,65V
Load regulation (on output terminals)
@ 35VIN, 3V3 3A Out :
Vout no load = 3,30V
Vout full load = 3,28V
Noise and transient response
Noise no load: ~10mV
Noise 3A load: ~28mV
0-3A Transient response overshoot: ~160mV
3-0A Transient response undershoot: ~316mV