ISL6522IR

DC DC Switching Controllers Overview

The ISL6522IR is a synchronous rectifier PWM controller IC designed for high-performance microprocessor power applications. It operates with a supply voltage range of 10.8V to 13.2V and supports a switching frequency adjustable from below 50kHz to over 1MHz, typically set at 200kHz. The device features a single output stage with positive configuration, delivering up to 25A maximum output current. It utilizes a buck topology with 100% maximum duty cycle capability and integrates an error amplifier with a 15MHz gain-bandwidth product. The component is housed in a 14-TSSOP package and functions within an operating temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Integrates complete control and protection for DC-DC converters optimized for microprocessor loads
• Drives two N-Channel MOSFETs in a synchronous rectified buck topology without external current sensing resistors
• Provides precise output voltage regulation down to 0.8V with ±1% tolerance over temperature and line variations
• Features fast transient response enabled by a high-gain error amplifier and simple single feedback loop voltage-mode control

DC DC Switching Controllers Applications

• Power supply for Pentium, Pentium Pro, PowerPC, and AlphaPC microprocessors
• High-power 5V to 3xV DC-DC regulators
• Low-voltage distributed power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix (e.g., IR, CV, CRZ) against the required operating temperature range and package type. Confirm RoHS compliance status as older variants may not meet current environmental standards. Check manufacturer documentation for end-of-life notices or production lifecycle status before finalizing design-in decisions.

DC DC Switching Controllers Selection Notes

Select this controller when designing single-phase synchronous buck converters for CPU core voltage regulation. Ensure the external MOSFETs support the required current handling and rDS(ON) characteristics for accurate internal current monitoring. Verify that the application requires the specific 14-TSSOP footprint and thermal performance capabilities provided by this package.

DC DC Switching Controllers Part Context

The ISL6522 belongs to Renesas' dedicated microprocessor voltage regulator module (VRM) controller family. It serves as a foundational component for generating stable, low-voltage power rails required by high-speed digital logic. The series includes various package and temperature grade options to suit different board space and environmental constraints.

DC DC Switching Controllers Replacement Considerations

Cross-reference with ISL6522CV or ISL6522CRZ for equivalent functionality with different temperature ratings or packaging. Verify pinout compatibility and electrical parameter alignment before substituting.