I followed the eval board circuit/layout exactly. I have a really hard time getting it to start up with any sort of load on it (>=100ma) with Vin < 11 volts. Over 11v Vin and everything is fine.
At first it wouldn’t start up at all with load attached regardless of Vin, until I removed the tantalum 100uF Cout and replaced it with a 100nF ceramic (maybe it’s too much with 100uF already in the load). At <11v Vin, I can start it with no load and then attach the load, but regulation is not good at all.
Does anyone have any suggestion to get this to work better in the 10-11v Vin range?