LTC4265IDE#TRPBF

Overview

The LTC4265IDE#TRPBF is a Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at (PoE+) and 802.3af (PoE) applications. It integrates a high-voltage power switch, current limit circuitry, and diagnostic features within a compact 12-lead DFN package. The device supports Class 0 through Class 4 power classification, enabling precise power allocation for connected Powered Devices (PDs). Operating with a supply voltage range of 37V to 57V, it provides robust protection against overvoltage, thermal stress, and short circuits while maintaining compliance with PoE standards.

Feature Summary

• Integrates a high-voltage power switch with built-in current limiting and thermal shutdown capabilities
• Supports full IEEE 802.3at and 802.3af classification protocols for accurate power negotiation
• Includes comprehensive diagnostic monitoring for fault detection and system status reporting

Applications

• Power Sourcing Equipment (PSE) controllers in enterprise network switches
• Midspan power injectors for legacy Ethernet infrastructure upgrades
• Access point power distribution modules requiring PoE+ compliance

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the IDE designation corresponds to the extended industrial temperature range requirements for your deployment environment. Ensure compatibility with existing PCB footprints designed for the standard 12-lead DFN package format before finalizing procurement orders.

Selection Notes

Select this component for designs requiring integrated PoE+ power switching without external MOSFETs. It is suitable for applications needing strict adherence to IEEE 802.3at classification levels. Consider the thermal performance characteristics of the DFN package relative to your enclosure's airflow conditions. Verify that the control interface matches your microcontroller or management logic voltage levels.

Part Context

This part belongs to Analog Devices' family of PoE controllers, specifically engineered for midspan and endspan implementations. It complements other devices like the LTC4264 by offering enhanced power handling capabilities for higher-class devices. The series focuses on simplifying design complexity by integrating critical power path components into a single monolithic solution.

Replacement Considerations

LTC4265CDE#TRPBF serves as a commercial grade alternative with identical electrical functionality but a narrower operating temperature range.