ISL6529CB-T

Overview

The ISL6529CB-T is a dual regulator power controller integrating one synchronous rectified buck PWM controller and one linear (LDO) controller. Designed for high-performance graphics cards, it provides two regulated output voltages: a high-current low-voltage supply via the buck converter and an independent lower-current supply via the linear stage. The device operates at a constant switching frequency of 600kHz and supports input voltages down to 5V. It drives external N-Channel MOSFETs in a 14-lead SOIC package.

Feature Summary

• Integrates a synchronous rectified buck PWM controller and a linear controller for dual-output regulation
• Drives low-cost N-Channel MOSFETs with 12V direct drive capability to minimize external components
• Features fast transient response through a high-bandwidth error amplifier and full 0-100% duty ratio

Applications

• Graphics processing unit (GPU) power supplies
• Memory supply regulation in embedded processor applications
• High-performance graphics card power management systems

Procurement Notes

Verify component authenticity and datasheet revision compatibility before integration. Confirm that the 14-lead SOIC package footprint matches the design layout. Check for end-of-life status or obsolescence notifications from Renesas Electronics, as this part may be discontinued. Ensure thermal management solutions align with the specific PCB copper area requirements for the SOIC package.

Selection Notes

Select this component when a single IC solution is required to regulate both a high-current GPU core voltage and a lower-current memory voltage. The integrated linear controller simplifies designs requiring a secondary stable rail without additional discrete controllers. Verify that the 600kHz switching frequency fits the electromagnetic interference constraints and inductor size limitations of the target application.

Part Context

The ISL6529 series belongs to Intersil's portfolio of dual regulator controllers tailored for graphics and embedded processors. It combines power distribution control with protection features in a compact form factor. The CB suffix typically denotes commercial temperature range specifications within the product family.

Replacement Considerations

Consult official Renesas/Intersil documentation for verified cross-reference part numbers. No public substitute part numbers are confirmed in the provided source material.