Filterless Class-D amplifier with built-in output stage 2 W into 4 Ω and 1.4 W into 8 Ω at 5.0 V supply Ultralow idle current with load resistance >87% efficiency at 5.0 V, 1.4 W into 8 Ω speaker Better than 96 dB SNR (signal-to-noise ratio) Availabl...