ISL6227HRZ

Special Purpose Regulators Overview

The ISL6227HRZ is a dual synchronous buck DC/DC controller designed for high-efficiency voltage regulation. It features an input voltage range of 4.5V to 30V, supporting conversion from AC/DC adapters or Li-Ion battery packs. The device integrates two PWM converters with automatic mode transition between constant-frequency synchronous rectification at heavy loads and hysteretic diode-emulation at light loads. It utilizes the lower MOSFET RDS(ON) as the current sense element to enhance efficiency.

Special Purpose Regulators Feature Summary

• Dual synchronous buck DC/DC converter architecture
• Automatic transition between continuous conduction and diode-emulation modes
• Integrated low-side MOSFET resistance current sensing
• Voltage-feed-forward ramp modulation

Special Purpose Regulators Applications

• DDR memory power regulation
• Chipset power supplies
• Graphics subsystem regulators
• Notebook PC system electronics

Special Purpose Regulators Procurement Notes

Verify component authenticity through authorized channels due to discontinuation status. Confirm package integrity and moisture sensitivity level handling requirements prior to assembly. Review official datasheets for specific ordering suffixes and environmental compliance details before finalizing procurement specifications.

Special Purpose Regulators Selection Notes

Select this controller for applications requiring wide input voltage compatibility and high efficiency across varying load conditions. Ensure design supports the required thermal dissipation for the specified package. Verify that the target system benefits from the integrated hysteretic mode operation for improved light-load performance compared to standard fixed-frequency controllers.

Special Purpose Regulators Part Context

The ISL6227 series belongs to Intersil's portfolio of mobile-friendly PWM controllers. This specific part is engineered for portable computing environments where power efficiency and compact design are critical. It serves as a core component in multi-phase power delivery systems for modern processors and memory interfaces.

Special Purpose Regulators Replacement Considerations

Check Renesas Electronics documentation for direct pin-compatible successors or updated series within the ISL62xx family. Evaluate alternative dual buck controllers with similar input ranges and current capabilities if exact replacements are unavailable.