ISL6556ACBR5208

Special Purpose Regulators Overview

The ISL6556ACBR5208 is a switching 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 operates with a nominal input voltage of 5 V, supporting an output voltage range from 837.5 mV to 1.6 V and delivering up to 120 A. It utilizes rDS(ON) current sensing for adaptive voltage positioning and overcurrent protection. The component is housed in a 28-pin SOIC package.

Special Purpose Regulators Feature Summary

• Controls up to four synchronous-rectified buck channels in parallel for multiphase architecture
• Utilizes rDS(ON) current sensing for adaptive voltage positioning and channel current balancing
• Supports external NTC compensation circuitry to nullify temperature effects on droop accuracy

Special Purpose Regulators Applications

• Microprocessor core voltage regulation
• VR10.X application systems
• Multiphase buck converter implementations

Special Purpose Regulators Procurement Notes

Verify the specific suffix 'R5208' against official Renesas or Intersil documentation to confirm pinout and electrical equivalence to standard ISL6556A variants. Ensure compatibility with VR10.X specifications before integration. Confirm RoHS compliance status as datasheets may indicate non-compliance for certain manufacturing codes. Validate package dimensions against the 28-SOIC specification.

Special Purpose Regulators Selection Notes

Select this controller for applications requiring precise multiphase control for high-current processor cores. The integrated rDS(ON) sensing eliminates the need for external sense resistors, reducing board space and cost. Consider the thermal performance of the SOIC package when designing for maximum load conditions. Verify that the system design supports the required 5 V input voltage range.

Special Purpose Regulators Part Context

This component belongs to the ISL6556 family of optimized multiphase PWM controllers. It is manufactured by Intersil, now part of Renesas Electronics. The device is specifically engineered for voltage regulator modules (VRMs) adhering to Intel VR10.X standards, providing a robust solution for modern processor power delivery networks.

Special Purpose Regulators Replacement Considerations

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