Stereo 3.1W Class D Amplifier

Big 3.1W/Channel Power in a Small, 16-Bump 0.4mm WLP

Please check latest availability status for a specific part variant.


The MAX98303 stereo 3.1W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (6dB, 9dB, 12dB, 15dB, and 18dB) set by a single gain-select input (GAIN).

Active emissions limiting, edge-rate, and overshoot control circuitry greatly reduces EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class D devices. These features reduce application component count.

The IC's 2.0mA at 3.7V, 2.7mA at 5V, quiescent current extends battery life in portable applications.

The IC is available in a 16-bump WLP (1.68mm x 1.68mm x 0.64mm) package specified over the extended -40°C to +85°C temperature range.
MAX98303: Typical Application Circuit MAX98303: Typical Application Circuit Enlarge+

Key Features

  • Low Quiescent Current: 2.0mA at 3.7V, 2.7mA at 5V
  • Spread Spectrum and Active Emissions Limiting
  • Five Pin-Selectable Gains
  • Click-and-Pop Suppression
  • Thermal and Overcurrent Protection
  • Low-Current Shutdown Mode
  • Space-Saving, 1.68mm x 1.68mm x 0.64mm, 16-Bump WLP (0.4mm Pitch)


  • Cellular Phones
  • MP3 Players
  • Notebook and Netbook Computers
  • Portable Audio Players
  • Tablets
  • VoIP Phones

See parametric specs for Speaker Amplifiers (36)

Part NumberClassSpkr. Amp. VCC
Spkr. Amp. VCC
Spkr. Amp. ICC
POUT into 4Ω @ 1% THD+N
POUT into 4Ω @ 10% THD+N
POUT into 8Ω @ 1% THD+N
POUT into 8Ω @ 10% THD+N
Spkr. Amp. Half Pwr. THD+N
minmaxtypminminminminA- WeightedminSee Notes
MAX98303 D2.65.522.
$0.66 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX98303EVKIT: Evaluation Kit for the MAX98303
Product Reliability Reports: MAX98303.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Related Resources

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  • Wide Input Supply Range (3.0V to 14V)
  • Class-DG Operation Enables Industry Leading Quiescent Power
  • Ultra-Low Noise Floor

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