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1.4W and 1W, Ultra-Small, Audio Power Amplifiers with Shutdown

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 1.4W into 8Ω Load (MAX4364)
  • 1W into 8Ω Load (MAX4365)
  • 0.04% THD+N at 1kHz
  • 68dB PSRR at 217Hz
  • 2.7V to 5.5V Single-Supply Operation
  • 5mA Supply Current
  • Low-Power, 10nA Shutdown Mode
  • Pin Compatible with the LM4861/LM4862/LM4864 (MAX4364)
  • Clickless Power-Up and Shutdown
  • Thermal-Overload and Short-Circuit Protection
  • Available in TDFN, µMAX, and SO Packages

Applications/Uses

  • Cell Phones
  • General-Purpose Audio
  • PDAs
  • Two-Way Radios

Description

The MAX4364/MAX4365 are bridged audio power amplifiers intended for portable audio devices with internal speakers. The MAX4364 is capable of delivering 1.4W from a single 5V supply and 500mW from a single 3V supply into an 8Ω load. The MAX4365 is capable of delivering 1W from a single 5V supply and 450mW from a single 3V supply into an 8Ω load. The MAX4364/MAX4365 feature 0.04% THD+N at 1kHz, 68dB PSRR at 217Hz, and only 10nA of supply current in shutdown mode.

The MAX4364/MAX4365 bridged outputs eliminate the need for output-coupling capacitors, minimizing external component count. The MAX4364/MAX4365 also include internal DC bias generation, clickless operation, short-circuit and thermal-overload protection. Both devices are unity-gain stable, with the gain set by two external resistors.

The MAX4364 is available in a small 8-pin SO package. The MAX4365 is available in tiny 8-pin TDFN (3mm x 3mm x 0.8mm) and µMAX® packages.

Simplified Block Diagram

MAX4364, MAX4365: Pin Configuration MAX4364, MAX4365: Pin Configuration Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .