Here’s the graph that got scrubbed out of the list msg about tests of the TI TPS63031 buck/boost DC converter chip (3.3v out for 2-5.5 volts in). When I look at that msg as I got it from the list the graph is there! But I just looked in the archives and see that it was scrubbed. Oh well.

This shows the package temperature measured with a cheapo IR themometer with different input voltages and output load currents. Chip McClelland is going to combine this with his tests for more details later.