LTC4266AIUHF-2#TRPBF

Overview

The LTC4266AIUHF-2#TRPBF is a quad Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at PoE applications. It supports four independent ports with integrated high-side switches and current limiters. The device operates from a 51V to 57V input supply and provides precise voltage regulation and classification logic. It features an I2C interface for configuration and monitoring, enabling flexible deployment in compact multi-port power solutions while maintaining compatibility with standard Powered Device requirements.

Feature Summary

• Integrates four independent PSE channels with built-in high-side switches and current limiting circuitry
• Supports IEEE 802.3at Type 2 classification with proprietary detection and classification schemes
• Includes an I2C serial interface for system control, status monitoring, and fault logging
• Provides comprehensive protection mechanisms including over-voltage, over-current, and thermal shutdown

Applications

• Multi-port PoE midspan power injectors
• IEEE 802.3at compliant network switch power modules
• Compact PoE power sourcing equipment designs requiring small footprint
• Industrial networking infrastructure power distribution units

Procurement Notes

Verify the specific suffix '2' indicates the correct pin-compatible variant within the LTC4266 family before procurement. Confirm that the TRPBF tape-and-reel packaging meets your assembly line requirements. Ensure the AI temperature grade matches your operational environment specifications. Cross-reference the datasheet revision date to confirm feature consistency with your design documentation.

Selection Notes

Select this component when designing systems requiring four isolated PoE ports in a minimal board area. The integrated switch architecture reduces external component count compared to discrete solutions. Consider the I2C interface if remote monitoring or dynamic power allocation is required. Verify input voltage ranges align with your available DC bus supplies. Evaluate thermal performance based on expected load currents and ambient conditions.

Part Context

This part belongs to the LTC4266 series of quad PSE controllers from Analog Devices. It is engineered for high-density PoE applications where space efficiency and compliance with IEEE 802.3at standards are critical. The device simplifies design by integrating power switches and control logic into a single package, reducing bill of materials complexity for multi-port network infrastructure.

Replacement Considerations

The LTC4266AIUHF-1#TRPBF is a confirmed substitute offering identical functionality but without the specific variant designation differences noted in official documentation. Designers should verify pinout compatibility and software configuration settings when migrating between these variants to ensure seamless integration.