Quote from: Olaf.Mandel on August 05, 2011, 03:45:30 PM

Quote from: fizzisist on August 04, 2011, 03:19:58 PM

[...]
4) Speaking of the LMZx2010, the datasheet is calling for slightly different resistor values on R_FBT and _FBB. Am I just reading this wrong or was this a mistake?

I just looked through the LMZ12010 datasheet. According to eq. (4), li_gangyi's resistor choice should get us VCCIO=2.484V and VCCINT[01]=1.193V. The recommended resistor values in the table on page 2 would give us VCCIO=2.474V and VCCINT[01]=1.210V, instead. So li_gangyi's seems better to me, as it is closer to correct in both cases.

Good eye, I didn't see that equation before, only the table. So, li_gangyi's choices would work because the ratio is right. On the other hand, the table values are the recommended values. Also, there's this note in the datasheet:

These resistors should generally be chosen from values in the range of 1.0 kΩ to 10.0 kΩ.

R_FBT is only 620 ohm on the 1.2V supplies right now, so we should increase those. I'd suggest just going with the recommended values as long as we're changing things...