ISL54000IRTZ

Overview

The ISL54000IRTZ is a stereo Class AB audio amplifier manufactured by Intersil, now part of Renesas Electronics. It delivers 1.23W per channel into an 8-ohm load and operates on a supply voltage range of 2.7V to 5.5V. The device is housed in a 20-TQFN (4x4mm) package with an exposed pad for thermal management. Key integrated features include depopulation circuitry to reduce speaker popping, a shutdown mode for power saving, and thermal protection to ensure reliability under varying operating conditions.

Feature Summary

• Stereo Class AB amplification architecture providing balanced dual-channel output
• Integrated thermal protection circuitry to prevent damage during overload conditions
• Shutdown functionality designed to minimize quiescent current consumption
• Depopulation feature implemented to suppress audible switching transients

Applications

• Portable multimedia devices requiring low-voltage stereo audio playback
• Embedded audio systems utilizing surface-mount assembly processes
• Battery-powered consumer electronics needing efficient power management

Procurement Notes

Verify the manufacturer designation as Intersil or Renesas Electronics depending on the production era. Confirm the suffix 'IRTZ' indicates the specific tape-and-reel packaging and RoHS compliance status. Ensure the component matches the 20-TQFN footprint dimensions for PCB layout compatibility. Check for obsolete status indicators if sourcing from secondary markets.

Selection Notes

Select this component when a compact stereo solution is required for low-to-moderate power audio applications. The 2.7V minimum supply voltage makes it suitable for single-cell battery operation. The 20-TQFN package offers a small form factor compared to larger QFP options. Verify that the 1.23W output capability meets the impedance requirements of the connected speakers.

Part Context

This part belongs to the ISL54000 series of integrated audio amplifier systems originally developed by Intersil Corporation. The series focuses on providing complete audio solutions with minimal external components. The IRTZ variant specifically denotes the lead-free, halogen-free version packaged in a thin quad flat no-lead configuration suitable for automated surface-mount manufacturing.

Replacement Considerations

Direct substitutes may include other Intersil/Renesas stereo Class AB amplifiers within the same voltage and power class. Verify pinout compatibility before replacing to avoid redesigning the printed circuit board. Consider packages such as TDFN or WQFN equivalents if space constraints differ.