ISL6522BIRZ-TK

DC DC Switching Controllers Overview

The ISL6522BIRZ-TK is a Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller manufactured by Renesas Electronics Corporation. It provides complete control and protection for DC-DC converters optimized for high-performance microprocessor applications. Designed to drive two N-Channel MOSFETs in a synchronous rectified buck topology, it integrates all control, output adjustment, monitoring, and protection functions into a single package. The device features a free-running triangle-wave oscillator adjustable from below 50kHz to over 1MHz, with a default frequency of 200kHz. It regulates output voltage precisely to as low as 0.8V with ±1% tolerance. The error amplifier offers a 15MHz gain-bandwidth product and 6V/µs slew rate for fast transient response. PWM duty ratio ranges from 0% to 100%. Overcurrent protection inhibits PWM operation using the upper MOSFET's rDS(ON). Operating temperature range is -40°C to +85°C. Package is 16-QFN (5x5mm).

DC DC Switching Controllers Feature Summary

• Integrates control, output adjustment, monitoring, and protection functions for synchronous buck converters.
• Provides precise voltage regulation down to 0.8V with ±1% tolerance across temperature and line variations.
• Features a 15MHz gain-bandwidth error amplifier and adjustable oscillator for fast transient performance.
• Eliminates external current sensing resistors by utilizing the upper MOSFET's rDS(ON) for overcurrent protection.

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 exact suffix 'TK' against official Renesas documentation, as standard listings typically use 'T'. Confirm availability status, as some variants may be discontinued or limited supply. Ensure the 16-QFN package matches your PCB footprint requirements. Check RoHS compliance details in the specific datasheet revision. Validate that the component meets your thermal management needs within the specified operating temperature range.

DC DC Switching Controllers Selection Notes

Select this controller for designs requiring integrated synchronous buck control without external current sense resistors. It is suitable for applications needing fast transient response and precise voltage regulation. Consider the 16-QFN package size for space-constrained layouts. Ensure the input voltage range supports your system requirements. Verify compatibility with the target microprocessor load line specifications.

DC DC Switching Controllers Part Context

The ISL6522 series includes variants like ISL6522IVZ-T and ISL6522BIRZ-T. The ISL6522B variant specifically uses a 16-QFN package. Other family members may differ in pin count or package type, such as the TSSOP-14 used in other versions. This part belongs to the PMIC - Power Management ICs category under Switching Controllers.

DC DC Switching Controllers Replacement Considerations

Check for direct substitutes within the ISL6522 family, such as ISL6522BIRZ-T. Verify pinout and package compatibility before substitution. Review updated datasheets for any functional changes or improvements in newer revisions. Ensure replacement parts meet the same thermal and electrical specifications.