ST TS4601B handbook
Datasheet
TS4601B is a high-performance stereo headphone amplifier with capacitorless outputs and I2C bus interface. It has a power supply range of 2.9V to 5.5V, 107 dB of PSRR at 217 Hz, fully differential inputs, I²C interface for volume control, digital volume control range from -60 dB to +4 dB, 101 dB of SNR A-weighted, independent right and left channel shutdown control, low quiescent current, low standby current, output-coupling capacitors removed, and flip-chip package with dimensions of 2.1 mm x 2.1 mm.