LTC4267IGN-1#PBF

Overview

The LTC4267IGN-1#PBF is a Powered Device (PD) controller for IEEE 802.3af Power over Ethernet applications, manufactured by Analog Devices Inc. It integrates a power switch with a maximum on-resistance of 2 Ohms and supports an input voltage range up to -57 V. The device features adjustable current limiting at 375 mA and operates within a temperature range of 0°C to +70°C. Packaged in a 16-lead SSOP, it provides comprehensive protection including open wire detection, reverse polarity protection, and thermal shutdown.

Feature Summary

• Integrates a low-loss power switch with internal current limiting for PoE powered devices
• Provides full IEEE 802.3af compliance with open wire detection capabilities
• Includes robust protection mechanisms such as reverse polarity protection and thermal shutdown

Applications

• IEEE 802.3af compliant Powered Devices
• PoE-powered network endpoints
• Industrial control systems requiring PoE integration

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the SSOP-16 package dimensions match your PCB footprint requirements. Ensure the operating temperature range of 0°C to +70°C meets your environmental specifications. Check for any recent Product Change Notices regarding manufacturing site or material updates.

Selection Notes

Select this component for designs requiring integrated PoE PD functionality without external switches. Compare against the LTC4267CGN-1#PBF if a wider commercial temperature range is required. Consider the LTC4267IDHC-3#PBF if a smaller DFN package is preferred for space-constrained layouts. Verify that the -57 V maximum rating aligns with your system's worst-case voltage conditions.

Part Context

This part belongs to the LTC4267 series of PoE controllers designed for simple, cost-effective implementation of powered devices. It complements other Analog Devices power management solutions like the LTC4055 for battery augmentation. The series supports standard PoE applications where compact size and integrated protection are critical design factors.

Replacement Considerations

The LTC4267CGN-1#PBF serves as a direct functional substitute with a broader commercial temperature range. Designers should verify pin compatibility and thermal performance when switching between these variants.