HIP6521CBZ

Overview

The HIP6521CBZ is a dual-output PWM controller designed for Intel Pentium III and IV processor power supplies. It integrates synchronous rectification control for the main core voltage buck converter and linear regulator drivers for auxiliary I/O and memory rails. The device operates from a 4.5V to 5.5V supply and features comprehensive protection mechanisms including over-current, over-voltage, and thermal shutdown. Packaged in a 24-lead SOIC, it supports high-efficiency power delivery architectures required by legacy high-performance computing platforms.

Feature Summary

• Integrated synchronous rectification control for primary core voltage regulation
• Dual output capability supporting main processor core and auxiliary system rails
• Comprehensive protection suite including over-current, over-voltage, and thermal monitoring

Applications

• Intel Pentium III processor power supply designs
• Intel Pentium IV processor power supply designs
• Legacy desktop motherboard VRM circuits

Procurement Notes

Verify component authenticity through authorized Renesas distributors or certified secondary market vendors. Request original manufacturer documentation and traceability records to confirm part integrity. Inspect packaging for seal integrity and label accuracy matching the 24-SOIC specification. Ensure compliance with RoHS3 standards as indicated in official datasheets. Validate lot codes against current production status reports.

Selection Notes

Select this component specifically for retrofits or maintenance of systems utilizing Intel Pentium III or IV processors. Evaluate pin compatibility with existing PCB layouts before integration. Consider the 24-SOIC package dimensions for mechanical fit within constrained chassis environments. Verify that the input voltage range aligns with the system's 5V rail stability requirements.

Part Context

This controller belongs to the historical Intersil portfolio acquired by Renesas Electronics. It represents a specialized solution for early 2000s high-performance microprocessor power management. The device was engineered to meet the stringent transient response and efficiency demands of contemporary CPU architectures. Its design reflects the industry shift toward integrated synchronous rectification in that era.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in standard reference databases. Engineering teams should consult Renesas technical support for legacy migration paths or equivalent modern alternatives suitable for specific board revisions.