ISL6529CB

Overview

The ISL6529CB is a dual regulator power controller integrating a synchronous rectified buck PWM controller and a linear (LDO) controller within a single 14-lead SOIC package. It provides two regulated output voltages, supporting a primary high-current buck output ranging from 0.8V to 3.3V at up to 15A, and an independent lower-current linear output ranging from 0.8V to 3.3V at up to 4A. The device operates at a constant switching frequency of 600kHz with a supply voltage range of 3.3V to 5V. It features undervoltage fault monitoring on both outputs and is designed for applications requiring precise regulation of GPU and memory supplies.

Feature Summary

• Integrates a synchronous rectified buck PWM controller and a linear controller in one package
• Drives low-cost N-Channel MOSFETs for both power stages
• Provides fully-adjustable output voltages down to 0.8V
• Includes undervoltage fault monitoring on both regulated outputs

Applications

• High-performance graphics cards
• Embedded processor applications
• GPU core voltage regulation
• Memory supply regulation

Procurement Notes

Verify the specific suffix 'CB' against the manufacturer's current product status, as this variant may be discontinued or subject to production change notifications. Confirm that the 14-SOIC package matches your PCB footprint requirements. Ensure compatibility with the required 3.3V or 5V bias supply voltage for proper operation of the internal charge pump and control logic.

Selection Notes

Select the ISL6529CB when a combined solution for high-current GPU core power and lower-current peripheral or memory power is required in a compact form factor. Choose this part over separate controllers to reduce component count and board space. Ensure the application requires the specific ±2% temperature regulation accuracy associated with the 'C' grade if tighter tolerance is not needed.

Part Context

The ISL6529CB belongs to the Intersil ISL6529 family of dual regulator power controllers. This family targets high-performance computing and graphics applications where multiple voltage rails are necessary. The 'CB' designation typically indicates a specific commercial temperature grade and package configuration within the broader ISL6529 series, which also includes variants like the ISL6529A and ISL6529ACB.

Replacement Considerations

Publicly confirmed direct substitute part numbers for the ISL6529CB are not available in the provided documentation. Consider evaluating other members of the ISL6529 family, such as the ISL6529A or ISL6529ACB, for functional compatibility, though pinout and electrical specifications must be verified against the original datasheet.