Hi Peter,
Please ask the customer to:
1) Change VREF to .8V -- This will reduce the current through the recommended 0.6A
2) Add a pullup resistor to the nFAULT pin -- this will allow observation of device faults. The nFAULT pin is an open drain output and requires a pullup to see a logic high.
3) Confirm the VM voltage of the pullup resistors is less than 7V -- ideally the voltage should be equal to or less than the mcu voltage