ISL6556BCRZA-T

Special Purpose Regulators Overview

The ISL6556BCRZA-T is a multi-phase PWM controller designed for Intel VR10.X microprocessor core voltage regulation. It drives up to four synchronous-rectified buck channels in parallel using interleaved timing to reduce ripple currents. The device features a 6-bit DAC for precise output voltage adjustment within the 837.5 mV to 1.6 V range. It supports switching frequencies from 80 kHz to 1.5 MHz and delivers up to 120 A of output current. Operating on a 5 V supply, it functions between 0°C and +70°C in a 32-VFQFN package.

Special Purpose Regulators Feature Summary

• Controls microprocessor core voltage by driving multiple synchronous-rectified buck channels in parallel
• Utilizes rDS(ON) current sensing for adaptive voltage positioning, channel current balancing, and overcurrent protection
• Includes programmable internal temperature compensation to ensure droop accuracy

Special Purpose Regulators Applications

• Intel VR10.X application controllers
• Microprocessor core voltage regulation
• Multi-phase buck converter architectures

Special Purpose Regulators Procurement Notes

Verify component authenticity through authorized Renesas distributors or certified partners. Confirm RoHS compliance status via official datasheets as specifications may vary by production batch. Check moisture sensitivity levels (MSL 3) and adhere to proper storage and reflow soldering guidelines to prevent damage during assembly.

Special Purpose Regulators Selection Notes

Select this controller for designs requiring precise multiphase control with integrated thermal compensation. Ensure the design accommodates the 32-VFQFN exposed pad package for adequate thermal dissipation. Verify that the required output voltage range and switching frequency align with the specific processor power delivery requirements.

Special Purpose Regulators Part Context

This component belongs to the ISL6556B series, which includes variants like the ISL6556ACB and ISL6556BCRZ. These devices are optimized for high-current, low-voltage applications targeting next-generation processors. The series emphasizes reduced component count and lower power dissipation through interleaved multi-phase operation.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The ISL6556BCRZ is listed as an obsolete variant within the same family. Designers should consult Renesas for current active alternatives or qualified cross-references.