ISL95857IRTZ

Special Purpose Regulators Overview

The ISL95857IRTZ is a multi-phase switching controller compliant with Intel IMVP8 specifications, designed for powering Intel microprocessors. It integrates three Voltage Regulator outputs: VR A (1-phase), VR B (configurable 2- or 1-phase), and VR C (1-phase). The device utilizes Robust Ripple Regulator technology to provide fast transient response and variable switching frequency. It supports system input power monitoring and operates within an industrial temperature range of -40°C to +85°C in a 40-pin TQFN package.

Special Purpose Regulators Feature Summary

• Complies with Intel IMVP8 standards for core, graphics, and system agent rails
• Integrates three independent voltage regulator controllers on a single chip
• Features programmable SVID address selection for flexible CPU support
• Supports lossless inductor DCR current sensing methods

Special Purpose Regulators Applications

• Intel Core processor power solutions
• Graphics rail regulation
• System agent rail regulation
• Notebook and desktop motherboard designs

Special Purpose Regulators Procurement Notes

Verify component status carefully as this part is designated as End-of-Life by the manufacturer. Confirm availability through authorized distributors only. Ensure compatibility with existing PCB footprints and thermal management requirements before procurement. Check for specific revision levels if replacing older stock.

Special Purpose Regulators Selection Notes

Select this controller for applications requiring a compact, single-chip solution for IMVP8 compatible CPUs. It reduces board area compared to two-chip approaches. Verify that the target CPU supports the serial data bus interface and that the design accommodates the specific phase configurations available for VR B.

Special Purpose Regulators Part Context

This component belongs to the ISL95857 series from Renesas/Intersil, specifically tailored for high-performance computing platforms. It represents a transition point in power management ICs moving towards integrated multi-phase control for mobile and desktop processors.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.