The switching audio amplifiers are widely used in various portable and consumer electronics due to their high efficiency, but suffers from low audio performances due to inherent nonlinearity. This paper presents an integrated class D audio amplifier with low consumption and high audio performances. It includes a power stage and an efficient control based on sliding mode technique. This monolithic class D amplifier is capable of delivering up to 1 W into 8 Omega load at less 0.01% THD from a 2.3 V power supply voltage in the high fidelity range (20 Hz-20 kHz). The power supply rejection is superior to 70 dB.