LTC4267IDHC-3#PBF

Overview

The LTC4267IDHC-3#PBF is a Power over Ethernet (PoE) Powered Device (PD) controller from Analog Devices, designed for IEEE 802.3af compliance. It integrates a PD interface with a 300kHz current-mode switching regulator to provide a complete power solution. The device operates within an input voltage range of -57V and supports output voltages up to 40V with a maximum output current of 1A. It is housed in a 16-pin DFN package measuring 5 x 3 x 0.7mm and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates IEEE 802.3af compliant Powered Device interface with a high-frequency switching regulator
• Provides complete power management solution combining PoE detection and DC/DC conversion
• Supports synchronous buck-boost topology for flexible output voltage regulation

Applications

• IEEE 802.3af Powered Device interfaces
• Power-over-Ethernet powered applications requiring integrated regulation
• Network infrastructure equipment powered via Ethernet cables

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when ordering. Confirm the -I grade temperature rating matches your operational environment requirements. Ensure the 16-pin DFN footprint aligns with your PCB layout specifications before finalizing procurement.

Selection Notes

Select this component when a combined PoE controller and switching regulator is required to minimize bill of materials. It is suitable for designs needing IEEE 802.3af compliance with integrated power conversion. Consider the 300kHz switching frequency for trade-offs between component size and efficiency.

Part Context

This part belongs to the LTC4267 family of PoE controllers. It is specifically the -3 variant which integrates the switching regulator functionality. Evaluation boards such as DC804B-A and DC859A are available for testing this specific IC configuration.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.