IS31AP4990D-UTLS2-TR

Overview

The IS31AP4990D-UTLS2-TR is a monolithic Class-AB audio power amplifier designed for mobile phones and portable electronic devices. It delivers 1.2W continuous RMS output power into an 8Ω load at 5V supply voltage with 1% THD+N. The device operates from a single supply voltage ranging from 2.7V to 5.5V and features an active-low shutdown mode that reduces supply current to less than 1μA. It includes internal thermal shutdown protection, near-zero pop and click performance, and ultra-low distortion characteristics.

Feature Summary

• Active-low shutdown mode significantly reduces quiescent current consumption
• Internal thermal shutdown protection safeguards against overheating
• Near-zero pop and click performance ensures quiet operation during power transitions
• Unity-gain stable configuration allows flexible external gain setting via resistors

Applications

• Mobile phones
• Portable electronic devices
• Notebook computers
• PDAs

Procurement Notes

Verify the specific ordering suffix UTLS2-TR corresponds to the UTQFN-9 package type and tape-and-reel quantity of 3000 units as documented in the official Lumissil Microsystems datasheet. Confirm compliance with RoHS, Halogen-Free, and TSCA requirements before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring high efficiency and low power consumption within a compact footprint. Ensure the design accommodates the UTQFN-9 package dimensions and utilizes appropriate decoupling capacitors (CS and CBYPASS) to optimize PSRR and minimize THD+N across the operating frequency range.

Part Context

This part belongs to the IS31AP4990 series of audio power amplifiers manufactured by Lumissil Microsystems. It is specifically engineered for space-constrained consumer electronics where minimizing external component count while maintaining high audio fidelity is critical.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.

FAQ

How does the shutdown mode function?

The device enters shutdown mode when a low level is applied to the SDB pin, reducing the supply current to less than 1μA.

What is the wake-up time specification?

The wake-up time is specified as 115ms at VCC = 5V and 102ms at VCC = 3V, assuming a bypass capacitor (CBYPASS) of 1μF.