ISL6328CRZ

Special Purpose Regulators Overview

The ISL6328CRZ is a dual PWM controller designed for powering AMD SVI split-plane processors. It integrates two synchronous buck DC/DC converters to deliver high efficiency and tight regulation. The device features a multi-phase controller for the Core voltage (VDD) and a single phase controller for the Northbridge (VDDNB). Input voltage ranges from 5V to 12V, with output voltages adjustable from 0.0125V to 1.55V. It supports selectable switching frequencies up to 1MHz and operates within a temperature range of 0°C to 70°C. The component is housed in a 48-VFQFN package with exposed pad.

Special Purpose Regulators Feature Summary

• Supports processor core voltage via integrated multi-phase power conversion with configuration flexibility for 1-4 phase operation.
• Provides precision core voltage regulation using differential remote voltage sensing and continuous DCR current sensing.
• Ensures optimal transient response through adaptive phase alignment and active pulse position modulation.
• Features serial VID interface handling up to 3.4MHz clock rates with multi-tiered overvoltage protection.

Special Purpose Regulators Applications

• Powering AMD SVI split-plane processors
• Core voltage (VDD) generation
• Northbridge (VDDNB) power supply

Special Purpose Regulators Procurement Notes

Verify component authenticity due to discontinuation status. Confirm package integrity and moisture sensitivity level handling procedures. Check for RoHS compliance documentation. Ensure supplier provides valid traceability records. Validate against original Intersil/Renesas datasheet specifications before integration.

Special Purpose Regulators Selection Notes

Select this controller for AMD processor platforms requiring SVI interface support. Consider phase count requirements for load conditions. Evaluate thermal management needs for QFN package. Verify input voltage compatibility with system rails. Assess transient response requirements for CPU workload variations.

Special Purpose Regulators Part Context

The ISL6328 belongs to the Intersil series of dual PWM controllers specifically engineered for AMD processor power delivery. It replaces older VRM standards by supporting the Serial VID Interface. The CRZ suffix indicates a lead-free, halogen-free variant compliant with environmental regulations. This component is part of Renesas' portfolio following the Intersil acquisition.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in verified documentation. The product status is listed as discontinued. Designers should consult official Renesas resources for potential obsolescence management strategies or next-generation alternatives.