PCM5102A I2S DAC (yellow PCB) commonly sold on Ebay. It has 3 AMS117-3.3 low dropout voltage regulators. There is no model number nor manufacture name on the PCB.
Currently powered with +5V from the RPi B+. Sounds great, much better than I would have thought a $5.66 usd DAC should. All credit to Ti for producing the PCM5102A and to the developers of Rune Audio.
RaspberryPi B+
RuneAudio_rpi_0.3-beta_20141029_2GB.img
Linux version 3.12.26-1-ARCH
I²S kernel module HiFiBerry DAC
