LTC4274AIUHF-2#TRPBF

Overview

The LTC4274AIUHF-2#TRPBF is a single-channel Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at (PoE+) and LTPoE++ applications. It operates within a power supply voltage range of 45V to 57V and supports a maximum output power of 38.7W. The device features an I2C interface for configuration and monitoring. It is housed in a 38-pin QFN EP package with a pin count of 38. The component functions reliably across an operating temperature range from -40°C to 85°C.

Feature Summary

• Supports IEEE 802.3at PoE+ and LTPoE++ standards for flexible power delivery
• Integrates I2C interface for programmable control and system monitoring
• Provides single-channel PSE management with integrated protection mechanisms

Applications

• Power sourcing equipment for IEEE 802.3at compliant network devices
• LTPoE++ powered device infrastructure controllers
• Single-port Ethernet switch power management modules

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the manufacturer is Analog Devices Inc. or Linear Technology. Ensure the part status is active before procurement. Cross-reference the full part number against official distributor catalogs to avoid counterfeit components. Validate RoHS compliance requirements if applicable to your assembly process.

Selection Notes

Select this component for designs requiring single-channel PoE+ or LTPoE++ support. The I2C interface allows for dynamic configuration, making it suitable for smart power distribution systems. Consider the 38-pin QFN EP package for thermal performance and space constraints. Ensure the input voltage range of 45V to 57V matches the upstream power source capabilities.

Part Context

This controller belongs to the LTC4274 family of PoE/PoE+ controllers. It shares functional similarities with other single-channel PSE controllers but is distinguished by its support for LTPoE++ standards. The device complements Analog Devices' portfolio of Ethernet power management solutions, offering a compact alternative to discrete implementations.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts and firmware if considering alternative single-channel PoE controllers from other manufacturers.