General Description

The MAX4364/MAX4365 are bridged audio power amplifiers intended for portable audio devices with internal speakers. The MAX4364 is capable of deliver ing 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.

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 Thin QFN, µMAX, and SO Packages

Applications

  Cellular Phones

  PDAs

  Two-Way Radios

  General-Purpose Audio