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TPS63060: TPS63060DSCR marking and performance problem

Part Number: TPS63060

1. Please help to confirm whether there is datecode information on the silkscreen

2. After we put on the board, there was abnormal sound and abnormal load, and the output voltage with load (150mA) was pulled down to about 3.6V

In standby mode at 70°C for about five days, a total of 11 sets, eight of them are the same phenomenon

Please help confirm the above two questions

thank you