LTC4267CGN-3#PBF

Overview

The LTC4267CGN-3#PBF is a Power Over Ethernet (PoE) Powered Device (PD) controller manufactured by Analog Devices Inc. It complies with the IEEE 802.3af standard and operates within an input voltage range of 37V to 57V. The device integrates a 300kHz current-mode switching regulator, eliminating the need for external inductors or optocouplers. It features a 16-pin SSOP package and supports adjustable current limiting. The component is designed for applications requiring efficient power conversion from PoE sources while maintaining compliance with network interface standards.

Feature Summary

• Integrates a 300kHz current-mode switching regulator for compact design
• Complies with IEEE 802.3af Powered Device standards
• Supports isolated flyback topology without optocouplers
• Features adjustable current limiting protection

Applications

• IEEE 802.3af compliant Powered Device interfaces
• Network equipment requiring integrated PoE power management
• Compact power solutions for LAN applications

Procurement Notes

Verify the specific suffix '-3' against official Analog Devices documentation to confirm the exact regulatory isolation and pinout configuration. Ensure compatibility with the target IEEE 802.3af infrastructure. Cross-reference the SSOP-16 package dimensions with PCB layout requirements. Confirm availability status through authorized distributors as supply may be limited.

Selection Notes

Select this component when designing IEEE 802.3af PDs requiring an integrated switching regulator. It is suitable for applications needing isolated outputs without external magnetics complexity. Consider the 300kHz switching frequency for EMI filtering requirements. Verify that the 37V to 57V input range matches the PoE source characteristics.

Part Context

This part belongs to the LTC4267 series of PoE controllers. It is distinct from non-integrated regulators by combining PD interface logic with power conversion. The 'GN' indicates the SSOP package type, while '#PBF' denotes lead-free packaging. It serves as a complete solution for powering network devices over Ethernet cables.

Replacement Considerations

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