The unity-gain stable LM4854 is both a mono differential output (for bridge-tied loads, or BTL) audio power amplifier and a single-ended (SE) stereo headphone amplifier. Operating on a single 5V supply, the mono BTL mode delivers 1.1W (typ) to an 8 load, 1.7W (typ) to a 4 load (Note 1) at 1% THD+N. In SE stereo mode, the amplifier will deliver 85mW to 32 loads. The LM4854 features a new circuit topology that suppresses output transients ('click and pops') and eliminates SE-mode output coupling capacitors, saving both component and board space costs. The LM4854 has three inputs: one pair for a two-channel stereo signal and the third for a single-channel mono input. The LM4854 is designed for PDA, cellular telephone, notebook, and other handheld portable applications. It delivers high quality output power from a surface-mount package and requires few external components. Other features include an active-low micropower shutdown mode, an "instant-on" low power standby mode, and thermal shutdown protection. The LM4854 is available in the very space-efficient 12-lead micro SMD, exposed-DAP LLP for higher power applications, and TSSOP packages. Note 1: An LM4854LD that has been properly mounted to a circuit board will deliver 1.7W (typ) into a 4 load.