LTC4267CDHC#PBF

Overview

The LTC4267CDHC#PBF is a Power over Ethernet (PoE) Powered Device (PD) interface controller compliant with the IEEE 802.3af standard, manufactured by Analog Devices Inc. It integrates a 300kHz current-mode switching regulator to provide a complete power solution for PD applications. The device operates within an input voltage range of 37V to 57V and supports output currents up to 900mA. It is housed in a 16-lead DFN package measuring 5mm x 3mm x 0.7mm.

Feature Summary

• Integrates an IEEE 802.3af compliant PD interface with a high-efficiency 300kHz current-mode switching regulator
• Provides a compact, complete power solution for Powered Device applications
• Supports operation across the full PoE input voltage range

Applications

• IEEE 802.3af Powered Device (PD) interfaces
• Power-over-Ethernet powered equipment requiring integrated regulation
• Compact network endpoint devices

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the manufacturer is Analog Devices Inc., formerly Linear Technology. Ensure the package matches the 16-lead DFN specification. Check for obsolescence or limited availability status as distribution varies.

Selection Notes

Select this component for designs requiring a single-chip PoE interface and DC-DC conversion. It eliminates the need for external controllers by integrating the switching regulator. Suitable for space-constrained applications needing IEEE 802.3af compliance without additional discrete components.

Part Context

This part belongs to the LTC4267 family of PoE controllers. It is functionally similar to variants like the LTC4267CGN-1#PBF but differs in package type, utilizing a DFN form factor instead of SSOP. It serves as a core power management IC for networked devices drawing power via Ethernet cables.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.