ISL95816HRZ

Special Purpose Regulators Overview

The ISL95816HRZ is a quad-phase PWM controller IC designed for VR12.5 compliant microprocessor core power supplies. It operates with an input voltage range of 4.5 V to 28 V and provides an output voltage range of 0.5 V to 2.3 V. The device supports 4-, 3-, 2-, or 1-phase configurations using Intersil’s Robust Ripple Regulator (R3) Technology. It features serial control bus communication, DCR current sensing with NTC compensation, remote voltage sense, and programmable parameters including V BOOT, I MAX, slew rate, and switching frequency.

Special Purpose Regulators Feature Summary

• Implements Robust Ripple Regulator (R3) Technology for faster transient response and improved light load efficiency through variable switching frequency.
• Supports flexible phase configurations ranging from single-phase to four-phase operation for optimized board area and cost.
• Enables precise current sensing via DCR measurement with single NTC thermistor compensation or resistor-based sensing.
• Provides comprehensive protection and programmability for overcurrent limits, voltage transition slew rates, and boot voltages.

Special Purpose Regulators Applications

• VR12.5 compliant microprocessor core power supplies
• Voltage Regulator (VR) control and protection circuits
• High-performance CPU power delivery systems

Special Purpose Regulators Procurement Notes

Verify component authenticity through authorized Renesas channels due to discontinued status. Confirm package integrity for the 32-VFQFN form factor. Check for moisture sensitivity handling requirements prior to assembly. Ensure compatibility with existing VR12.5 system designs given the end-of-life classification.

Special Purpose Regulators Selection Notes

Select this controller for applications requiring strict VR12.5 compliance and multi-phase flexibility. Consider the R3 technology benefits for transient performance. Evaluate thermal management needs for the QFN-32 package. Verify support for required current sensing methods and programmable protection thresholds against system specifications.

Special Purpose Regulators Part Context

Part of the ISL95816 series by Renesas/Intersil, focusing on high-efficiency CPU power management. Designed to replace older generation controllers with enhanced dynamic response capabilities. Integrates advanced modulation techniques to reduce component count and improve overall power supply efficiency in demanding computing environments.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available as the component is listed as discontinued. Designers should evaluate newer Renesas VR controllers that maintain VR12.5 compatibility and similar pinout or functional characteristics for migration strategies.