ISL6524CBZ

Special Purpose Regulators Overview

The ISL6524CBZ is a VRM8.5 compatible power system controller integrating one PWM controller and three linear regulators in a 28-pin SOIC package. It provides four regulated output voltages for high-performance microprocessor applications, including core, AGTL+, AGP, and chipset power. The device operates with an internal 200 kHz oscillator and supports voltage-mode control with 0% to 100% duty ratio capability. Input voltage ranges from 10.8V to 13.2V, with operating temperatures between 0°C and +70°C.

Special Purpose Regulators Feature Summary

• Integrates one synchronous-rectified buck converter and three linear controllers for comprehensive power management
• Supports VRM8.5 TTL-compatible 5-bit DAC for precise microprocessor core voltage selection
• Utilizes MOSFET rDS(ON) for overcurrent fault monitoring without external sensing elements
• Provides separate delayed Power Good outputs for voltage monitoring

Special Purpose Regulators Applications

• Motherboard power regulation for Intel Pentium 4 processors
• Microprocessor core voltage control
• AGTL+ bus power supply
• AGP bus power regulation

Special Purpose Regulators Procurement Notes

Verify RoHS compliance status as the 'Z' suffix indicates lead-free packaging, but confirm specific manufacturing lot dates against discontinuation notices. Check for moisture sensitivity level requirements during storage and handling. Ensure the 28-SOIC footprint matches the target PCB design before procurement.

Special Purpose Regulators Selection Notes

Select this component when designing systems requiring integrated control for four distinct voltage rails within a single package. It is suitable for applications needing precise core voltage adjustment via digital interface and simplified thermal management through integrated linear regulators for auxiliary rails.

Special Purpose Regulators Part Context

Part of the ISL6524 family designed for Intel VRM8.5 specifications. The series includes variants like ISL6524ACB and ISL6524CB, differing primarily in RoHS compliance and initial release batches. This controller addresses the power delivery needs of early 2000s high-speed CPUs.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The product status is listed as discontinued by multiple distributors.