LTC4266AIUHF-4#PBF

Overview

The LTC4266AIUHF-4#PBF is a quad Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at PoE+ applications. It supports four independent ports with an input voltage range of 37V to 57V and delivers up to 25.5W per port. The device integrates high-side current sensing, precise classification logic, and I2C interface capabilities for system monitoring and control.

Feature Summary

• Integrates four independent PSE channels within a single package
• Supports IEEE 802.3at Type 2 classification standards
• Includes integrated high-side current sense amplifiers
• Features I2C digital interface for configuration and status reporting

Applications

• IEEE 802.3at PoE+ midspan power injectors
• High-density network switch power modules
• Industrial IoT gateway power distribution units

Procurement Notes

Verify the specific suffix '4' indicates the quad-channel variant during procurement. Confirm RoHS compliance status through official manufacturer documentation. Ensure the operating temperature range aligns with industrial requirements. Validate pinout compatibility with existing PCB layouts before finalizing orders.

Selection Notes

Select this component for designs requiring four isolated PoE+ outputs in a compact footprint. Compare against single-channel alternatives to optimize board space. Consider thermal management solutions due to high power density. Verify I2C addressability if multiple controllers are used on the same bus.

Part Context

This part belongs to the LTC4266 family of PoE controllers from Analog Devices. It serves as a core component for modern Ethernet infrastructure equipment. The device simplifies design by integrating protection and control functions typically handled by discrete components.

Replacement Considerations

• LTC4266AIUHF-1#PBF
• LTC4266CIUHF-4#PBF