ISL6521CB-T

Overview

The ISL6521CB-T is a PWM Buck DC/DC and Triple Linear Power Controller manufactured by Intersil, now part of Renesas. It operates within a supply voltage range of 4.5 V to 5.5 V, with a nominal input of 5 V. The device utilizes pulse width modulation (PWM) voltage-mode control technology. It is housed in a 16-pin Small Outline Integrated Circuit (SOIC) package, specifically identified as SOP16 with a .25 inch body width. The component is RoHS compliant and has a moisture sensitivity level of 3.

Feature Summary

• Integrates one synchronous rectified buck converter for primary core voltage regulation alongside three linear controllers for auxiliary system voltages.
• Provides comprehensive power control, protection, and monitoring functions for the PWM controller and linear regulators within a single integrated circuit.

Applications

• Regulating low voltage supplies requiring high current, such as FPGA, ASIC, or processor core voltages.
• Powering I/O circuits and memory subsystems via integrated linear regulators.
• High-performance microprocessor power distribution systems.

Procurement Notes

Verify the specific suffix 'CB-T' against the manufacturer's official datasheet FN9100 series documentation to confirm tape-and-reel packaging and temperature grade specifications. Ensure compatibility with the intended PCB footprint for the SOIC-16 package. Cross-reference the manufacturing date code and RoHS compliance status with current Renesas product change notices to guarantee material consistency and availability.

Selection Notes

Select this component when a combined solution for high-current core regulation and multiple lower-current auxiliary rails is required. It is suitable for designs needing integrated protection and monitoring features without separate discrete controllers. Consider the 5V bias requirement and SOIC-16 thermal characteristics during the initial schematic capture and layout phase.

Part Context

This device belongs to the ISL6521 family of power management ICs designed for complex digital logic loads. It consolidates the functions typically handled by multiple discrete components into a compact form factor. The integration simplifies board space requirements and reduces the overall bill of materials for multi-rail power architectures in computing applications.

Replacement Considerations

Consult the official Renesas cross-reference guide for verified equivalents. Verify pin-to-pin compatibility and electrical parameter alignment before substitution.