GENERAL DESCRIPTION
The SSM2317 is a fully integrated, high efficiency, Class-D audio amplifier. It is designed to maximize performance for mobile phone applications. The application circuit requires a minimum of external components and operates from a single 2.5 V to 5.5 V supply. It is capable of delivering 3 W of continuous output power with <1% THD + N driving a 3 Ω load from a 5.0 V supply

FEATURES
   Filterless Class-D amplifier with Σ-Δ modulation
   Automatic level control (ALC) improves dynamic range and
      prevents clipping
   3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply
      with <10% total harmonic distortion (ALC off)
   700 mW into 8 Ω load at 4.2 V supply (ALC 80%)
   93% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
   >93 dB signal-to-noise ratio (SNR)
   Single-supply operation from 2.5 V to 5.5 V
   20 nA ultralow shutdown current
   Short-circuit and thermal protection
   Available in 9-ball, 1.5 mm × 1.5 mm WLCSP
   Pop-and-click suppression
   Built-in resistors reduce board component count
   Default fixed 18 dB or user-adjustable gain setting

APPLICATIONS
   Mobile phones
   MP3 players
   Portable gaming
   Portable electronics
   Educational toys