330mW, Ultra-Small, Audio Power Amplifiers with Shutdown

The MAX4366/MAX4367/MAX4368 are bridged audio power amplifiers intended for devices with internal speakers and headsets. The MAX4366/MAX4367/MAX4368 are capable of delivering 330mW of continuous power into a 32Ω load, or 200mW into a 16Ω load with 1% THD+N from a single 5V supply.

The MAX4366/MAX4367/MAX4368 bridged outputs eliminate the need for output-coupling capacitors minimizing external component count. The MAX4366/MAX4367/MAX4368 also feature a low-power shutdown mode, clickless power-up/power-down and internal DC bias generation. The MAX4366 is a unity-gain stable, programmable gain amplifier. The MAX4367/MAX4368 feature internally preset gains of 2V/V and 3V/V, respectively.

All devices are available in space-saving 8-pin TDFN and 8-bump UCSP™ chip-scale packages.

Applications

* Cellular Phones * General-Purpose Audio * Headphones * Headsets * PDAs * Two-Way Radios

* Drives 330mW into 32Ω (200mW into 16Ω)

* 0.02% THD+N at 1kHz (120mW into 32Ω)

* Internal Bridged Configuration

* No Output-Coupling Capacitors

* 2.3V to 5.5V Single-Supply Operation

* 2mA Supply Current

* Low-Power Shutdown Mode

* Clickless Power-Up and Shutdown

* Thermal Overload Protection

* Available in TDFN and UCSP Packages