LTC4266CUHF#TRPBF

Overview

The LTC4266CUHF#TRPBF is a quad Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at and 802.3bt PoE applications. It integrates four independent channels within a compact QFN-40 package, supporting input voltages from 37V to 57V. The device features integrated high-frequency transformers, eliminating the need for external magnetics. Key electrical parameters include a maximum channel current of 1A per port and support for Class 4 power delivery up to 90W. Operating temperature range spans from -40°C to +85°C.

Feature Summary

• Integrates four independent PoE PSE channels with built-in isolation transformers
• Supports IEEE 802.3at and 802.3bt standards for high-power PD detection
• Includes integrated linear regulators and protection circuitry for each channel
• Features programmable soft-start and over-current protection mechanisms

Applications

• High-density PoE switches and hubs
• Industrial Ethernet networking equipment
• Access points requiring 802.3bt power budgets
• IoT gateway power distribution units

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or direct manufacturer channels. Confirm lot traceability and RoHS compliance status prior to procurement. Ensure storage conditions meet moisture sensitivity level requirements. Request full datasheet and application notes for design validation. Check for recent production changes or obsolescence notices.

Selection Notes

Select this component for designs requiring high integration density in PoE infrastructure. The integrated transformer solution reduces board space compared to discrete approaches. Consider thermal management requirements due to quad-channel operation. Evaluate system power budget against the 90W capability per port. Ensure compatibility with target IEEE 802.3 standard revisions.

Part Context

This part belongs to the LTC4266 family of quad PSE controllers. It represents an evolution in PoE integration by combining switching regulation, isolation, and control logic. The CUHF suffix indicates commercial temperature grade and tape-and-reel packaging. It complements single-channel solutions like the LTC4260 for scalable network switch designs.

Replacement Considerations

Direct substitutes may include other quad PSE controllers from Analog Devices such as the LTC4267 series. Verify pin-to-pin compatibility and software configuration differences when replacing. Cross-reference with competitors' offerings only if functional equivalence is confirmed via official documentation.