ISL6521CBZA

Overview

The ISL6521CBZA is a PWM Buck DC/DC and Triple Linear Power Controller manufactured by Renesas (formerly Intersil). It provides power control and protection for one synchronous rectified buck converter and three linear controllers. The device regulates low voltage supplies requiring high current, such as FPGA or processor core voltages, while managing system I/O and memory circuits. It operates within an input voltage range of 4.5 V to 5.5 V using voltage-mode pulse width modulation control.

Feature Summary

• Integrates a synchronous buck controller with three dedicated linear regulators for comprehensive multi-rail power management
• Provides integrated protection mechanisms including overcurrent, thermal, and fault monitoring for the switching and linear stages
• Supports VID-based regulation for precise core voltage adjustment in high-performance digital logic applications

Applications

• FPGA core voltage regulation
• ASIC processor power supply control
• System I/O and memory circuit voltage regulation

Procurement Notes

Verify component authenticity through authorized Renesas distributors due to historical brand transitions. Confirm RoHS compliance status and specific temperature grade variants against the official datasheet. Ensure ordering suffixes match required packaging and environmental specifications before procurement.

Selection Notes

Select this controller for designs requiring a single-chip solution for core and auxiliary rails. Evaluate thermal performance requirements for the SOIC-16 package. Verify compatibility with external MOSFET gate drive requirements and ensure input voltage levels align with the specified 4.5 V to 5.5 V operating range.

Part Context

This component belongs to the Intersil VRM (Voltage Regulator Module) family, now managed under Renesas Electronics. It addresses the power delivery needs of high-speed digital processors by combining switching and linear regulation technologies into a unified control architecture for efficient system power distribution.

Replacement Considerations

Consult Renesas documentation for direct pin-compatible substitutes within the ISL65xx series. Verify functional equivalence regarding control loops and protection thresholds when considering alternative part numbers.