LTC4266IUHF#PBF

Overview

The LTC4266IUHF#PBF is a quad Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at PoE+ applications. It supports four independent channels with an input voltage range of 37V to 57V and delivers up to 25.5W per port. The device integrates high-voltage switches, current limit control, and classification logic. Key features include hot-swappable operation, programmable delay timers, and comprehensive protection against overcurrent, overvoltage, and thermal faults. It communicates via I2C for system monitoring and configuration.

Feature Summary

• Integrates four independent PoE+ PSE controllers with integrated high-voltage power switches
• Supports IEEE 802.3at Type 2 classification and detection protocols
• Features programmable delay timers and fault protection mechanisms
• Includes I2C interface for system management and status reporting

Applications

• High-density PoE switch designs requiring compact footprint
• Network infrastructure equipment supporting PoE+ endpoints
• Industrial control systems utilizing powered devices
• Access point power distribution modules

Procurement Notes

Verify the specific suffix 'I' indicates industrial temperature range (-40°C to +85°C). Confirm package type matches design requirements. Check manufacturer documentation for latest revision history and compliance certifications before finalizing procurement specifications.

Selection Notes

Select this component when designing multi-port PoE+ solutions requiring integrated switching capability. Ensure input voltage capabilities align with standard PoE bus voltages. Consider thermal management strategies due to power dissipation in dense layouts. Verify I2C address configurations if multiple controllers are used on the same bus.

Part Context

This part belongs to Analog Devices' LTC4266 family of quad PSE controllers. It is commonly paired with evaluation boards like DC1366B for development. It serves as a core component in modern Ethernet switches, replacing discrete solution approaches to save space and improve reliability.

Replacement Considerations

Direct replacements may include other quad PSE controllers from Analog Devices such as the LTC4267 or LTC4268, depending on power class requirements. Cross-reference pinouts and electrical characteristics carefully. Alternative manufacturers offer similar functions but may require schematic modifications.