AOZ18101DI-03

Overview

The AOZ18101DI-03 is a 5A electronic fuse (eFuse) solution from Alpha & Omega Semiconductor, designed for server and storage applications. It operates within an input voltage range of 3.5V to 14V with a maximum absolute rating of 22V. The device integrates low RDS(ON) back-to-back MOSFETs with a typical on-resistance of 20mΩ, housed in a compact 3mm x 3mm 10-DFN package with an exposed pad. It supports surface mount installation and functions across a temperature range of -40°C to 125°C.

Feature Summary

• Integrates high-performance IC with advanced TrenchFET technology for robust protection
• Provides true reverse current blocking disabled to prevent bus shutdown during inductive load events
• Includes startup SOA management for safe hot insertion onto 12V backplanes
• Offers programmable overcurrent protection and soft-start capabilities

Applications

• Server main power bus protection
• Storage system load protection
• Hard disk drive interface protection
• Server fan circuit protection

Procurement Notes

Verify the specific suffix DI-03 to confirm the disabling of True Reverse Current Blocking (TRCB), which distinguishes it from DI-01/02 variants. Ensure compatibility with inductive loads such as fans or drives where TRCB activation could cause unintended bus shutdown. Confirm package type is 10-DFN-EP (3x3) and operating temperature range meets system requirements of -40°C to 125°C.

Selection Notes

Select this variant when protecting high-inductance loads like server fans or HDDs where reverse current flow is expected during transients. Unlike DI-01/02, the DI-03 disables TRCB to maintain bus stability. Choose based on the need for integrated back-to-back MOSFETs in a small footprint, eliminating external discrete FETs required in traditional hot-swap designs.

Part Context

Part of the AOZ18101DI series, the first eFuse solution from AOS for server applications. It replaces traditional hot-swap controllers and external FETs with a compact, multi-chip packaged solution. The series includes variants with and without TRCB to suit different load characteristics, ensuring reliable power distribution in high-reliability systems.

Replacement Considerations

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