ISL6420BIAZ

DC DC Switching Controllers Overview

The ISL6420BIAZ is an advanced single synchronous buck pulse-width modulation (PWM) controller manufactured by Renesas Electronics. It operates from a 4.5V to 5.5V input or 5.5V to 28V input range and features a 0.6V internal reference voltage with ±2.0% accuracy. The device supports resistor-selectable switching frequencies between 100kHz and 1.4MHz, achieving up to 96% maximum duty cycle. It drives N-Channel MOSFETs in a synchronous rectified topology, offering lossless programmable overcurrent protection, programmable soft-start, and voltage margining modes. The component is housed in a 20-lead QFN package.

DC DC Switching Controllers Feature Summary

• Integrates control, output adjustment, monitoring, and protection functions for high-performance DC/DC buck converters
• Supports external reference voltage tracking mode for DDR termination supplies and system testing
• Features diode emulation during startup for pre-biased load applications
• Provides fast transient response via a high-bandwidth error amplifier

DC DC Switching Controllers Applications

• Networking DC/DC converter applications
• DDR termination supplies
• System testing requiring voltage margining

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'IAZ' against official Renesas documentation to confirm pinout and thermal pad configuration. Confirm current lifecycle status as the base ISL6420B series has been marked obsolete with recommended replacements available. Ensure compatibility with the intended input voltage range of 4.5V–5.5V or 5.5V–28V before integration.

DC DC Switching Controllers Selection Notes

Select this controller for designs requiring precise voltage regulation down to 0.6V with high accuracy. Consider the 100kHz to 1.4MHz adjustable frequency range for optimizing efficiency and component size. Verify that the application benefits from the integrated lossless overcurrent protection and soft-start features to simplify the power management design.

DC DC Switching Controllers Part Context

The ISL6420BIAZ belongs to the ISL6420B family of advanced single synchronous buck PWM controllers. This series is designed to simplify the implementation of complete control and protection schemes. The device integrates multiple functions into a single package to reduce board space and improve efficiency in synchronous rectified buck topologies.

DC DC Switching Controllers Replacement Considerations

The ISL8117 is a documented replacement product for the ISL6420B series. Verify electrical compatibility and pinout alignment before substitution.