ISL6522BCBZ

DC DC Switching Controllers Overview

The ISL6522BCBZ is a synchronous buck PWM controller designed for high-performance microprocessor power supplies. It integrates control, monitoring, and protection functions to drive two N-channel MOSFETs in a synchronous rectified topology. The device features a free-running oscillator adjustable from below 50kHz to over 1MHz, with a standard frequency of 200kHz. It supports a maximum duty cycle of 100% and regulates output voltage as low as 0.8V with ±1% tolerance. Operating within a temperature range of 0°C to 70°C, it utilizes a 14-SOIC package.

DC DC Switching Controllers Feature Summary

• Integrates complete control and protection for DC-DC converters optimized for microprocessor applications
• Drives two N-channel MOSFETs in a synchronous rectified buck topology without requiring external current sensing resistors
• Provides fast transient response via a single feedback loop voltage-mode control architecture

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 component status carefully as the ISL6522BCBZ is listed as obsolete or discontinued by the manufacturer. Confirm availability through authorized distributors or secondary market sources. Ensure that any replacement components maintain compatibility with the required 14-SOIC footprint and electrical specifications for your specific design.

DC DC Switching Controllers Selection Notes

Select this controller when designing synchronous buck converters for legacy Intel and IBM processor architectures. It is suitable for applications requiring precise voltage regulation down to 0.8V with tight tolerance. Consider its integrated RDS(ON) current sensing feature if minimizing external component count is a priority. Verify thermal performance requirements against the specified operating temperature range.

DC DC Switching Controllers Part Context

The ISL6522BCBZ belongs to the ISL6522 family of synchronous buck controllers manufactured by Renesas Electronics (formerly Intersil). This series was widely used in server and workstation platforms during the late 1990s and early 2000s. The 'CBZ' suffix typically denotes the specific package type and RoHS compliance status within the product line.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, engineers should evaluate modern synchronous buck controllers from Renesas or other manufacturers that support similar voltage ranges and package footprints.