Features and Benefits

  • +2.7V to +5.5V Single-Supply Operation
  • 2W/Channel Output Power at 5V
  • 0.7W/Channel Output Power at 3V
  • 87% Efficiency (RL = 4Ω, POUT = 2W)
  • 0.4% THD+N (RL = 4Ω, fOSC = 125kHz)
  • Logic-Programmable PWM Frequency Selection (125kHz, 250kHz, 500kHz, 1MHz)
  • Low-Power Shutdown Mode
  • Clickless Transitions Into and Out of Shutdown
  • 1A Current Limit and Thermal Protection
  • Available in Space-Saving Packages
    • 16-Pin QSOP or Narrow SO

Product Details

The MAX4295 mono, switch-mode (Class D) audio power amplifier operates from a single +2.7V to +5.5V supply. The MAX4295 has > 85% efficiency and is capable of delivering 2W continuous power to a 4Ω load, making it ideal for portable multimedia and general-purpose high-power audio applications.

The MAX4295 features a total harmonic distortion plus noise (THD+N) of 0.4% (fOSC = 125kHz), low quiescent current of 2.8mA, high efficiency, and clickless power-up and shutdown. The active-low SHDN input disables the device and limits supply current to < 1.5µA. Other features include a 1A current limit, thermal protection, and undervoltage lockout.

The MAX4295 reduces the number of required external components. Internal high-speed power-MOS transistors allow operation as a bridge-tied load (BTL) amplifier. The BTL configuration eliminates the need for isolation capacitors on the output. The frequency-selectable pulse-width modulator (PWM) allows the user to optimize the size and cost of the output filter.

The MAX4295 is offered in a space-saving 16-pin QSOP or narrow SO package.


  • AC Amplifiers
  • Battery-Powered Speakers
  • Boom Boxes
  • Cordless Phones
  • Game Cards
  • Palmtop/Notebook Computers
  • PDA Audio
  • Portable Equipment
  • Sound Cards

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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