AOZ5518QI

Overview

The AOZ5518QI is a high-efficiency, synchronous step-down DC/DC converter from Alpha & Omega Semiconductor. It integrates two N-channel power MOSFETs and operates with an input voltage range of 4.5V to 28V. The device supports output voltages adjustable from 0.6V to 24V via external resistors. It features a fixed switching frequency of 350kHz and delivers up to 5A continuous output current. The converter includes comprehensive protection mechanisms such as over-current, over-voltage, and thermal shutdown.

Feature Summary

• Integrated synchronous rectification for enhanced efficiency
• Wide input voltage range suitable for various power sources
• Adjustable output voltage capability
• Built-in protection against overload and overheating

Applications

• Industrial control systems
• Telecommunications equipment
• Consumer electronics power supplies

Procurement Notes

Verify the specific suffix 'QI' indicates automotive grade qualification if required for your application. Confirm package type matches your PCB layout requirements. Ensure compatibility with your target operating temperature range. Check for RoHS compliance status in official documentation before finalizing procurement decisions.

Selection Notes

Consider the fixed 350kHz switching frequency when designing filter components. Evaluate thermal performance based on expected load currents and ambient conditions. Verify that the external resistor network accurately sets the desired output voltage within the specified range. Assess system requirements against the 5A current limit to ensure adequate headroom.

Part Context

This component belongs to Alpha & Omega's portfolio of integrated power solutions designed for robust performance in demanding environments. The AOZ5518 series focuses on providing reliable power conversion with minimal external component count. It targets applications requiring stable voltage regulation under varying load conditions.

Replacement Considerations

Consult official manufacturer cross-reference lists for verified substitutes. Ensure any replacement part maintains compatible input/output voltage ranges and current capabilities. Verify pinout compatibility to avoid redesigning existing circuit boards.