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TPS7A8300: TPS7A8300RGWR: Vref Varying from chip to chip

Part Number: TPS7A8300

We bought the above regulators from mouser (Purchase order no. TIFR/1180317/12P0213) in Feb 2019.

We observed that the output of the regulator while using ANY-OUT programmable operation varies from IC to IC and thus the programmable combinations

had to be changed from module to module in our design. Below are the measured voltages at different pins of three ICs

                                   IC1                IC2                 IC3

Pin 3 (Fb)                  1.037V           0.884V            0.970V

Pin 13 (NS/SS)          0.778V           0.778V           0.778V

Pin 1 (Vout)                1.037V           0.884V            0.970V

when programmble pins are open


We didn't face the above problem in the regulators that we got as samples (TPS7A8300RGR)