LTC4274AIUHF-3#PBF

Overview

The LTC4274AIUHF-3#PBF is a single-channel Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at (PoE+), 802.3af (PoE), and LTPoE++ standards. It supports up to 90W of power delivery via LTPoE++. The device operates within a supply voltage range of 45V to 57V and features an I2C interface for configuration. Packaged in a 38-pin QFN with an exposed pad, it functions within 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 management and control
• Compatible with IEEE 802.3af and 802.3at PoE standards

Applications

• High-power network infrastructure equipment
• LTPoE++ compliant Powered Devices (PD)
• Enterprise networking switches and access points

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free RoHS compliance when ordering. Confirm that the '3' variant designation aligns with your required pinout or feature set compared to other LTC4274 variants. Ensure the 38-WFQFN package dimensions match your PCB footprint requirements. Check manufacturer documentation for any recent updates to the LTPoE++ implementation details.

Selection Notes

Select this component when designing systems requiring LTPoE++ support alongside legacy PoE/PoE+ compatibility. The single-channel architecture suits applications needing independent power sourcing per port. Consider the I2C interface requirements for host microcontroller integration. Evaluate thermal performance given the 90W capability in the specified QFN package.

Part Context

This part belongs to the Analog Devices LTC4274 family of PSE controllers. It specifically targets the LTPoE++ market segment, offering higher power density than standard PoE solutions. The device integrates necessary control logic for power negotiation and delivery management within a compact surface-mount package suitable for dense board layouts.

Replacement Considerations

The LTC4274AIUHF-1#PBF is a documented substitute within the same family. Verify functional equivalence regarding LTPoE++ support and pinout compatibility before replacement. Other variants may differ in channel count or specific feature sets.