ISL95855AIRTZ-T

Special Purpose Regulators Overview

The ISL95855AIRTZ-T is a multi-phase switching controller designed for IMVP8 compliant Intel microprocessors. It integrates three independent voltage regulator outputs: VR A (configurable as 3, 2, or 1 phase), VR B (2 or 1 phase), and VR C (1 phase). The device supports SVID and SMBus interfaces for CPU communication. Key electrical parameters include an output voltage range of 0 V to 1.52 V and peak output currents of 27 A, 85 A, and 120 A for the respective phases. It operates within a temperature range of -10°C to +100°C and utilizes a 48-lead TQFN package.

Special Purpose Regulators Feature Summary

• Supports Intel IMVP8 standard with flexible phase configuration for core, graphics, and system agent rails.
• Integrates R3 modulation technology for fast transient response and adaptive body diode conduction time reduction.
• Enables precise current sensing via inductor DCR detection with NTC compensation or precision resistor methods.
• Provides comprehensive protection features including over-current protection and remote voltage sensing.

Special Purpose Regulators Applications

• Power supply design for Intel Core processors adhering to IMVP8 specifications
• Multi-phase voltage regulation for CPU core, graphics, and system agent domains
• High-performance notebook and mobile computing platform power management

Special Purpose Regulators Procurement Notes

Verify component authenticity through authorized Renesas distributors due to End-of-Life status. Confirm RoHS compliance and moisture sensitivity level prior to assembly. Review latest Product Change Notification for any manufacturing updates. Ensure storage conditions meet humidity requirements to prevent package degradation before soldering.

Special Purpose Regulators Selection Notes

Select this controller for designs requiring integrated control of three distinct voltage rails with minimal external components. Consider the specific phase count requirements for each rail when configuring VR A and VR B. Evaluate thermal performance given the operating temperature range and ensure compatibility with supported DrMOS or discrete power stages.

Special Purpose Regulators Part Context

This component belongs to the ISL95855 series, which provides complete power solutions for Intel CPUs. It replaces older single-phase controllers by integrating multiple regulators into a single package. The series supports various packaging options and addresses the increasing power density demands of modern mobile processors.

Special Purpose Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the product is marked obsolete, alternative sourcing should focus on existing inventory from authorized channels or consult Renesas for potential next-generation replacements.