We had manufactured 10 Nos of boards with TPS65251. In them around 8 Nos of baords, the output voltage of TPS65251 is working good without any issues
See the attached schematics.
But in remaining two boards we are facing the issues as the output voltage is not as per the expected. 0.7 V instead of 3.3V ; 1.5v instead of 2.5V, 1.2v instead of 1.8V. The output is continuously fluctuating.
For the reference please find the below graph,
For 2.5v supply rail, we are observing 2.5v and dropping to 1v & again returning back to 2.5V. with time period of 33msec
For 1.8v supply rail, we are observing 1.8v and dropping to 0.5v & again returning back to 1.8V. with time period of 33msec
For 3.3v supply rail, we are observing 1.8v and dropping to 0.7v & again returning back to 1.8V. with time period of 33msec
Also we had ensured all the resistor values are fine and 8 Nos of boards are working, but two boards alone not working remaining boards never faced the issues.
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