ISL6522CB

DC DC Switching Controllers Overview

The ISL6522CB is a synchronous buck PWM controller designed for high-performance microprocessor applications. It integrates control, output adjustment, monitoring, and protection functions in a single package. The device drives two N-channel MOSFETs with a maximum duty cycle of 100%. It features a free-running oscillator adjustable from below 50kHz to over 1MHz, with a standard operating frequency of 200kHz. The error amplifier provides a 15MHz gain-bandwidth product and 6V/µs slew rate for fast transient response. Output voltage regulation is precise to as low as 0.8V with ±1% tolerance. The IC operates within a supply voltage range of 10.8V to 13.2V and supports an output current up to 25A.

DC DC Switching Controllers Feature Summary

• Integrates complete control and protection for DC-DC converters optimized for microprocessors
• Enables simple single feedback loop voltage-mode control with high bandwidth
• Monitors current using the upper MOSFET rDS(ON) to eliminate sensing resistors
• Provides phase control, soft start, and enable functionality

DC DC Switching Controllers Applications

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

DC DC Switching Controllers Procurement Notes

Verify component status carefully as this part number may be discontinued or subject to product change notices. Confirm the specific suffix requirements for temperature range and packaging format against official Renesas documentation before ordering. Ensure compatibility with existing board layouts due to the 14-SOIC package dimensions.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring precise voltage regulation down to 0.8V with tight tolerance. The integrated current sensing via MOSFET rDS(ON) reduces external component count. Suitable designs must accommodate the 10.8V to 13.2V Vcc supply range and utilize the 14-SOIC footprint.

DC DC Switching Controllers Part Context

The ISL6522 series belongs to Renesas' portfolio of VRM controllers targeting legacy and specialized processor architectures. It serves as a single-phase solution compared to multi-phase variants like the ISL6524. The CBZ suffix indicates a lead-free RoHS-compliant version in a tube package.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.