MAX4299EWP+

Audio Special Purpose Overview

The MAX4299EWP+ is an audio system IC designed for single +5V applications, featuring a stereo headphone driver, microphone amplifier, and a +3.3V linear regulator. It operates from a 4.5V to 5.5V supply with a typical quiescent current of 10.6mA. The device delivers ultra-high power-supply rejection (PSRR) of 115dB DC and 80dB at 100kHz. Driver amplifiers provide 1.5VRMS into 10kΩ with 0.0008% THD+N. The integrated regulator outputs 100mA at +3.3V. It supports clickless/popless operation and drives up to 22nF capacitive loads.

Audio Special Purpose Feature Summary

• Stereo headphone driver with 115dB DC PSRR
• Microphone preamplifier with 0.005% THD+N
• Integrated 100mA, +3.3V linear regulator
• Clickless/Popless power-up and mute functions

Audio Special Purpose Applications

• Notebook and Desktop Audio Systems
• Hands-Free Headsets
• USB Audio Peripherals
• IP Telephones
• Wireless Internet Devices

Audio Special Purpose Procurement Notes

Verify the package type matches the required footprint. The EWP+ suffix indicates a wide SOIC-20 package with lead-free composition. Confirm that the application environment requires the specific integration of the headphone driver, microphone amp, and regulator within this single component.

Audio Special Purpose Selection Notes

Select the MAX4299EWP+ when board space is limited and noisy digital supplies are present. Ensure the design can accommodate the 20-pin wide SOIC package. Verify that the load requirements align with the 100mA regulator limit and the driver's capacitive drive capability of 22nF.

Audio Special Purpose Part Context

This component belongs to the MAX4298/MAX4299 family of audio system ICs. The MAX4299 adds a microphone amplifier and linear regulator to the stereo headphone driver found in the MAX4298. Both devices target harsh digital environments requiring high PSRR and compact solutions.

Audio Special Purpose Replacement Considerations

The MAX4298EWP+ is a compatible alternative if the microphone amplifier and linear regulator features are not required. Other pin-compatible options exist in different packages, such as the 16-pin TSSOP (MAX4299EUE).

Audio Special Purpose FAQ

What is the maximum capacitive load the driver can handle?

The output amplifiers are capable of driving a capacitive load of up to 22nF.

How does the MUTE function operate?

Connecting the MUTE pin to VCC mutes OUT1 and OUT2 while keeping them in a low-impedance state to ensure clickless/popless operation. REG, BIAS, and MICOUT remain unaffected.

Can the regulator output voltage be adjusted?

Yes, the nominal 3.3V output is adjustable between 1.2V and 4.5V by connecting a resistor divider from REG to GND and feeding back to the FB pin.