Linear voltage regulator failure?

I've been building USB powered audio DAC circuit which is using multiple LDO voltage regulators.

I discovered one of the regulators, namely TPS79333, which is responsible for supplying 3.3V to PCM2706 chip, is outputting 4.92V (more or less equal as input voltage). Is this a clear case of faulty voltage regulator or could a problem be something else? Is there a way to trace which component is causing it?

Also I'm afraid it's over for DAC chip with such high voltage on supply pins. :(

EDIT: To clarify I'm building PupDAC. Schematic can be found here: http://www.diyforums.org/PupDAC/schematic/pupDACschematic.pdf

Regulator in question is U2.

• You say you've been building, but don't say you've been designing. And you ask now about how to find the problem. This suggests to me that you really are only building and not designing. Is that the case? If so, it will be vital that you disclose exactly what you are building and its full schematic, I think. – jonk Jul 22 '18 at 18:22
• Why are you not using the internal 3.3 volt regulator on the PCM2706 chip? – Andy aka Jul 22 '18 at 18:34
• outputting 4.92V .... are you sure that the voltage is not arriving to the output of the TPS79333 from another source? – jsotola Jul 22 '18 at 18:37
• I will remove my vote to close if you add a schematic and picture. – mkeith Jul 22 '18 at 18:37
• @PrimePriest Please write up your comment as an answer (and accept it) so that this question does not die officially unanswered. This would be a help to the community. – mkeith Jul 23 '18 at 22:21