LTC4267CGN#PBF

Overview

The LTC4267CGN#PBF is a Power over Ethernet (PoE) Powered Device interface controller compliant with IEEE 802.3af standards, manufactured by Analog Devices Inc. It integrates a switching regulator and operates within an input voltage range of -57 V to -37 V. The device features an adjustable current limit of 375 mA and a maximum on-resistance of 2 Ohms for the internal switch. Designed for surface-mount installation in SSOP-16 packages, it supports duty cycles up to 90% and functions reliably across operating temperatures from 0°C to +70°C.

Feature Summary

• Integrates a high-efficiency switching regulator directly within the PoE interface controller to simplify power supply design.
• Provides comprehensive protection mechanisms including thermal shutdown and reverse polarity detection for robust operation.
• Supports standard IEEE 802.3af classification and signaling protocols for seamless network integration.

Applications

• Powering IP cameras and wireless access points via Ethernet infrastructure
• Industrial automation controllers requiring isolated power supplies
• Network-enabled sensors and remote monitoring devices

Procurement Notes

Verify the specific suffix #PBF confirms lead-free compliance and RoHS adherence before procurement. Confirm package integrity for the SSOP-16 form factor during inspection. Ensure the ordering part number matches the exact electrical specifications required for your circuit design. Cross-reference the manufacturer's latest datasheet for any updates regarding pinout or operational limits.

Selection Notes

Select this component when designing systems that require integrated PoE classification and DC-DC conversion in a compact footprint. It is suitable for applications needing precise current limiting and thermal management without external optocouplers. Consider the SSOP-16 package constraints and thermal dissipation requirements relative to the 375 mA load capability.

Part Context

This component belongs to the LTC4267 series of PoE interfaces, which are designed to simplify the implementation of powered devices in Ethernet networks. The series offers various package options and regulatory compliance levels to suit different environmental and spatial constraints in modern networking hardware.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB footprints and control logic if considering alternative PoE controllers from other manufacturers.