LTC4267IGN-1#TRPBF

Overview

The LTC4267IGN-1#TRPBF is a Powered Device (PD) controller compliant with the IEEE 802.3af standard for Power over Ethernet applications. It integrates a high-voltage power switch, current limit control, and fault protection logic within a single package. The device operates from a -57V supply and features an internal MOSFET with a maximum on-resistance of 2 Ohms. It supports a programmable current limit of 375 mA and includes thermal shutdown capabilities. The component is designed for surface-mount installation in SSOP-16 packages and functions reliably across a temperature range of 0°C to +70°C.

Feature Summary

• Integrates IEEE 802.3af compliant Powered Device interface with internal power switch
• Provides precise current limiting and thermal shutdown protection mechanisms
• Supports hot-plug insertion without disrupting the network or power source

Applications

• PoE-powered IP cameras and wireless access points
• Industrial sensor nodes requiring isolated power
• Network infrastructure powered devices

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when sourcing. Confirm the IGN-1 designation matches the required operating temperature range and pinout configuration. Ensure compatibility with existing PCB footprints for the SSOP-16 package. Cross-reference the manufacturer's latest datasheet for any updates to electrical characteristics or recommended operating conditions prior to final procurement.

Selection Notes

Select this component for designs requiring strict adherence to IEEE 802.3af standards with integrated power switching. Consider the SSOP-16 package constraints for board space limitations. Evaluate the 375 mA current limit against the target load requirements. Verify that the 0°C to +70°C operating range meets the environmental specifications of the end application.

Part Context

This part belongs to the Analog Devices LTC4267 family of PoE controllers. It serves as a core component for managing power delivery in Ethernet-based systems. The device simplifies design by combining control logic and power handling in one IC. It is commonly used alongside external transformers and rectifiers to complete the PD front-end circuit.

Replacement Considerations

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