GENERAL DESCRIPTION
The SSM2305 is a fully integrated, high efficiency, Class-D audio amplifier 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 2.2 W of continuous output power with less than 1% THD + N driving a 4 Ω load from a 5.0 V supply. It has built-in thermal shutdown and output short-circuit protection.

FEATURES
   Filterless Class-D amplifier with Σ-Δ modulation
   No sync necessary when using multiple Class-D amplifiers
      from Analog Devices, Inc.
   2.8 W into 4 Ω load and 1.6 W into 8 Ω load at 5.0 V supply
      with <10% total harmonic distortion (THD)
   89% efficiency at 5.0 V, 1.3 W into 8 Ω speaker
   >98 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 8-lead, 3 mm × 3 mm LFCSP and MSOP
   Pop-and-click suppression
   Built-in resistors reduce board component count
   Fixed and user-adjustable gain configurations

APPLICATIONS
   Mobile phones
   MP3 players
   Portable gaming
   Portable electronics
   Educational toys