Hi Team,
I am using TPS63710DRRR in my design to generate -5V output with 12V input supply. The schematic is as:
I have 6 boards, out of which in 1 board output voltage is not showing up. I am measuring approx. -56mV at the output instead of -5V.
I have tried the following checks for debugging.
1. The output voltage rail impedance is good and same as of working boards.
2. The enable input is also provided ( 5V )
3. VAUX output is showing as expected ( 4.6V ).
4. VREF output is showing approx. -56mV which should be greater I feel. The impedance of VREF pin also looks fine ( approx. same as working boards). I tried replacing the IC but still I am facing the same issue.
I request your support for debugging.
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Thanks in Advance
Kiran