ISL6277AHRZ-T

Special Purpose Regulators Overview

The ISL6277AHRZ-T is a multi-output switching controller from the Robust Ripple Regulator (R3) series, designed for AMD Fusion SVI 2.0 CPU and GPU power delivery. It integrates two output channels with an input voltage range of 4.5V to 25V and adjustable output voltages from 0.006V to 1.55V. The device operates within a temperature range of -10°C to 100°C and utilizes a 48-VFQFN package with exposed pad.

Special Purpose Regulators Feature Summary

• Supports AMD Fusion SVI 2.0 interface protocols for high-speed CPU/GPU control
• Integrates dual synchronous buck regulator controllers in a compact footprint
• Utilizes Robust Ripple Regulator technology for enhanced transient response

Special Purpose Regulators Applications

• AMD Fusion APU CPU core voltage regulation
• AMD Fusion APU GPU core voltage regulation
• Multi-rail server and workstation power supplies

Special Purpose Regulators Procurement Notes

Verify component status as the base model ISL6277AHRZ is listed as obsolete with an end-of-life date in 2026. Confirm availability of the tape-and-reel variant ISL6277AHRZ-T through authorized distributors or secondary markets. Ensure compliance with RoHS3 specifications and check for any recent product change notices regarding manufacturing sites or labeling updates before finalizing procurement plans.

Special Purpose Regulators Selection Notes

Select this controller when designing power stages for AMD Fusion architecture processors requiring SVI 2.0 communication. The dual-channel design simplifies board layout compared to discrete solutions. Ensure the selected external MOSFETs and inductors match the controller's current capabilities and thermal requirements within the specified operating temperature range.

Special Purpose Regulators Part Context

This component belongs to Renesas' portfolio of specialized power management ICs targeting high-performance computing applications. It is part of the broader ISL6277 family, which includes variants like the ISL62771 and ISL62773, tailored for specific multi-phase configurations in advanced processor power delivery systems.

Special Purpose Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the proprietary nature of the SVI 2.0 interface and R3 control algorithm, direct pin-to-pin replacements may require significant circuit redesign.