LTC4274AIUHF-2#PBF

Overview

The LTC4274AIUHF-2#PBF is a single-channel Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at PoE+, 802.3af PoE, and LTPoE++ standards. It operates within a supply voltage range of 45V to 57V with a typical supply current of 2.4mA. The device supports up to 90W of power delivery via LTPoE++. It utilizes an I2C interface for configuration and monitoring. The component is housed in a 38-pin QFN package with an exposed pad and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports LTPoE++ standard for high-power delivery up to 90W
• Integrated I2C interface for system control and status monitoring
• Single-channel architecture optimized for compact PSE designs

Applications

• High-power PoE network infrastructure equipment
• LTPoE++ compliant Power Sourcing Equipment
• Enterprise networking switches requiring extended power budgets

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free tape-and-reel or tube packaging as per manufacturer specifications. Confirm that the '2' variant designation aligns with your required pinout or feature set compared to other LTC4274 variants. Ensure compatibility with your I2C bus voltage levels and check for any specific ordering restrictions or lifecycle status updates from Analog Devices before finalizing procurement.

Selection Notes

Select this component when designing single-channel PSE systems requiring support for the LTPoE++ standard alongside legacy PoE and PoE+ modes. The choice depends on the need for a 38-QFN footprint and I2C controllability. Consider thermal management requirements due to the 90W capability and ensure the PCB layout accommodates the exposed pad for adequate heat dissipation within the specified industrial temperature range.

Part Context

This part belongs to the LTC4274 family of PoE controllers from Analog Devices. It serves as a specialized solution for modern networking hardware needing higher power densities than traditional PoE standards allow. The device integrates necessary protection and signaling logic to manage power negotiation and delivery safely over Ethernet cabling, distinguishing it from general-purpose power management ICs by its protocol-specific compliance features.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify if the LTC4274AIUHF-1#PBF or LTC4274AIUHF-4#PBF offers compatible functionality, noting that different suffixes may indicate variations in packaging or specific feature sets rather than direct functional equivalents.