LTC4266AIUHF-3#TRPBF

Overview

The LTC4266AIUHF-3#TRPBF is a quad Power Sourcing Equipment (PSE) controller from Analog Devices, designed for high-power PoE applications. It supports LTPoE++ standards, enabling up to 90W per port through proprietary detection and classification schemes while maintaining backward compatibility with Type 1 and Type 2 Powered Devices. The device integrates four independent channels within a single package, featuring an I2C-compatible interface for system monitoring and control. Packaged in a 5x5 mm LQFN-40EP, it operates over an extended industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports LTPoE++ power delivery up to 90W per port with proprietary mutual identification between PSE and PD
• Maintains full interoperability with existing IEEE 802.3af/at/bt Type 1, 2, and 3 Powered Devices
• Integrates four independent PSE channels with I2C-compatible monitoring and control interface
• Includes comprehensive protection features against short circuits, overcurrent, and thermal overload

Applications

• High-density PoE switches and hubs requiring compact form factors
• LTPoE++ powered devices such as wireless access points and PTZ cameras
• Industrial networking equipment operating in extended temperature environments
• Power-over-Ethernet midspan injectors supporting advanced power classes

Procurement Notes

Verify the specific suffix "-3" designation against official Analog Devices documentation to confirm exact electrical characteristics and pinout configuration. Ensure compliance with RoHS directives and check current availability status, as supply constraints may apply. Confirm that the LQFN-40EP package matches your PCB footprint requirements and thermal management strategy before finalizing procurement.

Selection Notes

Select this component when designing systems requiring simultaneous support for legacy PoE standards and high-power LTPoE++ applications. The integrated quad-channel architecture reduces board space compared to discrete solutions. Verify that the host microcontroller supports the required I2C communication protocol for proper configuration and monitoring of all four ports.

Part Context

This part belongs to the LTC4266 family of quad PSE controllers, which are widely used in modern Ethernet infrastructure. The AIUHF-3 variant specifies the industrial temperature grade and specific packaging configuration. It serves as a core component for next-generation PoE deployments aiming to deliver increased power budgets without increasing cabling complexity.

Replacement Considerations

The LTC4266AIUHF-1#TRPBF and LTC4266AIUHF-2#TRPBF are confirmed substitutes within the same family, offering identical functionality with different factory programming configurations. Verify that any replacement maintains the required LTPoE++ support and I2C interface compatibility.