ISL6534CRZ

Overview

The ISL6534CRZ is a triple regulator IC featuring two independent synchronous-rectified buck controllers and one linear post-regulator. It operates with voltage-mode control using pulse width modulation at switching frequencies up to 1 MHz. The device supports an input voltage range from 3.3 V to 12 V. Packaged in a 32-lead QFN (5 mm x 5 mm), it integrates DDR capability for high-performance computing applications requiring low noise and high current delivery.

Feature Summary

• Integrates dual synchronous buck controllers with a single linear post-regulator for efficient power conversion
• Supports voltage-mode control with adjustable switching frequencies up to 1 MHz
• Designed for low-noise applications suitable for sensitive digital loads like DDR memory

Applications

• Low parts count 5.0V to 3.3V computer supply
• Low noise SMPS post regulator
• High-current, current-limited switch applications

Procurement Notes

Verify the specific suffix 'CRZ' against the manufacturer's official documentation to confirm package type and RoHS compliance status. Check the product lifecycle status as this component may be discontinued or obsolete. Ensure the ordering part number matches the exact pinout and thermal requirements of the target design before procurement.

Selection Notes

Select this component when a compact solution combining synchronous buck regulation with a linear post-regulator is required. It is suitable for designs needing low output ripple and high transient response. Verify that the 32-lead QFN package fits the PCB footprint constraints and that the input voltage range aligns with the system power rails.

Part Context

This part belongs to Renesas' family of versatile triple regulators designed for complex power distribution networks. It combines switching efficiency with linear regulation precision. The ISL6534 series is typically used in systems requiring multiple regulated outputs from a single controller chip, reducing component count and board space.

Replacement Considerations

Check for direct cross-reference part numbers from Renesas or other manufacturers offering compatible dual-buck plus linear topologies. Verify pin compatibility and electrical specifications if substituting with similar devices.