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TPSM365R3: Module incorrect output

Part Number: TPSM365R3

Hi,

I am using the module to get 5.7V from an input of 20V-50V. For some reason, when I power it up, the output goes to ~21V. When I vary the input voltage from 25V - 40V, the output moves with it from 19.9v - 22.24V. When the input voltage drops below ~25V, the output stays about 3V below the input.

I tried increasing Cout to around 20uF but that didn't do much.

The schematic is shown below. I should have probably ran a test pad to PGOOD, but I thought it's a simple chip, what could go wrong.

Thanks