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. :(
Thank you for your answers.
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.