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TPS82085: Vout Ripple is very high...

Part Number: TPS82085

Hi Guys,

My customer is using TPS8208x on their design. In testing, they found the output ripple is almost 3% of Vout, much larger than the datasheet specs. Especially when they vary the Vin. 

Here is their schematic, I found their Cin is way too small, and asked them to increase it. They said it makes things worse. 

The layout also looks suspect, but I wasnt sure if that would actually cause issues with poor output ripple performance. 

Lastly, I have not confirmed if they are using good probe techniques, so that could potentially be the problem too. I figured I would at least pass this along in case you see anything I don't. Could a feed forward cap make the ripple better? or just more Cout?

Thanks,

Brian