IS31AP4912-UTLS2-TR

Overview

The IS31AP4912-UTLS2-TR is a Class-AB stereo headphone inverting amplifier with an integrated charge pump controller. It delivers 30mW into a 32Ω load with less than 0.1% THD+N. The internal charge pump generates a negative reference voltage to bias outputs about ground, eliminating the need for output DC-blocking capacitors. Gain is adjusted via external resistors. The device operates from 2.7V to 5.5V over a temperature range of -40°C to +85°C and features ultra-low current shutdown mode.

Feature Summary

• Integrated charge pump eliminates output DC-blocking capacitors
• Ultra-low current shutdown mode reduces power consumption
• Built-in thermal protection circuit prevents overheating
• Click-and-pop suppression minimizes noise during transitions

Applications

• Cellular handsets
• PDAs
• Notebook PCs
• MP3 players
• Portable gaming devices

Procurement Notes

Verify the specific ordering suffix UTLS2-TR against the manufacturer's latest documentation to confirm package type and reel quantity specifications. Ensure compliance with RoHS and Halogen-Free requirements as stated in the datasheet. Confirm industrial temperature range suitability (-40°C to +85°C) for the intended application environment before finalizing procurement.

Selection Notes

Select this component for applications requiring space-saving designs due to its UTQFN-12 (2mm × 2mm) package. Consider the integrated charge pump feature if minimizing external component count and cost is a priority. Evaluate the 2.7V to 5.5V supply voltage range against system power constraints. Verify that the required gain setting can be achieved with available resistor tolerances to maintain optimal performance.

Part Context

The IS31AP4912 is part of Lumissil Microsystems' audio amplifier portfolio, designed specifically for portable electronics where size, battery life, and cost are critical. It belongs to the IS31AP series of Class-AB amplifiers, offering high signal-to-noise ratio and low total harmonic distortion plus noise for clear audio reproduction in compact form factors.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided source material.