FAB3103UCX

Overview

The FAB3103UCX is a Class-D mono audio amplifier from onsemi, designed for high-efficiency audio applications. It integrates a boost regulator to deliver up to 2.3W of output power into an 8-ohm load, operating from a single supply voltage range of 2.5V to 5.2V. The device features Automatic Gain Control (AGC), differential inputs, and built-in short-circuit and thermal protection. It is housed in a compact 12-WLCSP package measuring 1.86x1.44 mm, suitable for space-constrained portable electronics.

Feature Summary

• Integrated boost regulator enables high output power from low-voltage supplies
• Automatic Gain Control (AGC) optimizes dynamic range and signal quality
• Differential input configuration reduces noise susceptibility
• Built-in short-circuit and thermal protection ensures operational reliability

Applications

• Portable media players and smartphones
• Bluetooth speakers and wireless audio devices
• Tablets and handheld gaming consoles
• Smart home audio assistants

Procurement Notes

Verify component authenticity through authorized onsemi distributors or certified partners. Confirm the part status as Last Time Buy (LTB) before finalizing procurement plans. Ensure compatibility with existing PCB layouts due to the specific WLCSP footprint requirements. Request official datasheets and test reports to validate performance specifications against application needs.

Selection Notes

Select this component when a compact, high-efficiency mono amplifier is required for battery-powered devices. The integrated boost regulator simplifies design by eliminating external inductors typically needed for higher power outputs. Consider the 12-WLCSP package size for strict spatial constraints. Verify that the 2.5V to 5.2V supply range aligns with the system's power architecture.

Part Context

The FAB3103UCX belongs to onsemi’s portfolio of Class-D audio amplifiers, targeting mobile and portable consumer electronics. It represents a solution for delivering high-quality audio in small form factors. The integration of AGC and boost regulation distinguishes it from basic amplifier ICs, offering enhanced performance in resource-limited environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the component is marked as Last Time Buy, alternative solutions may require redesigning the audio stage. Consult onsemi technical support for potential legacy replacements or newer generation equivalents.