ISL6556ACRZ-T

Special Purpose Regulators Overview

The ISL6556ACRZ-T is a switching controller IC from Renesas Electronics, designed for Intel VR10.X microprocessor core voltage regulation. It drives up to four synchronous-rectified buck channels in parallel using a multi-phase architecture with interleaved timing to reduce ripple currents. The device operates with an input voltage range of 3V to 12V and provides adjustable output voltages from 0.84V to 1.6V. It features rDS(ON) current sensing for adaptive voltage positioning and overcurrent protection. The component is housed in a 32-QFN (5x5mm) package with an exposed pad and supports operation temperatures from 0°C to 70°C.

Special Purpose Regulators Feature Summary

• Multi-phase PWM control for up to four parallel buck channels
• Integrated rDS(ON) current sensing for adaptive droop and balancing
• Supports Intel VR10.X specification compliance
• Interleaved timing to minimize input and output ripple

Special Purpose Regulators Applications

• Intel processor core voltage regulation
• Multiphase DC-DC converter systems
• High-current CPU power delivery networks

Special Purpose Regulators Procurement Notes

Verify the specific suffix 'CRZ-T' against official Renesas documentation to confirm tape-and-reel packaging and anneal status. Confirm end-of-life or obsolescence status prior to design-in, as availability may be limited. Ensure compatibility with existing PCB footprint and thermal management requirements for the 32-QFN package.

Special Purpose Regulators Selection Notes

Select this controller when designing for Intel VR10.X compliant platforms requiring precise multiphase control. Consider the integrated current sensing capabilities if external sense resistors are undesirable. Evaluate thermal performance within the 0°C to 70°C operating range and ensure the 3V-12V input range matches the system bus voltage.

Special Purpose Regulators Part Context

The ISL6556B series represents a family of optimized multiphase PWM controllers by Renesas (formerly Intersil). These devices are specifically engineered for high-performance computing applications, offering digital interface options and robust protection features. The ISL6556ACRZ-T variant integrates specific analog characteristics suitable for legacy or specific Intel platform implementations.

Special Purpose Regulators Replacement Considerations

Consult Renesas cross-reference tools for direct replacements. Potential alternatives include other members of the ISL6556B family or newer Renesas PMICs supporting VRM/VR10 standards. Verify pinout and electrical parameter compatibility before substitution.