LTC4263CDE-1#PBF

Overview

The LTC4263CDE-1#PBF is a Power Sourcing Equipment (PSE) controller with an integrated power switch, compliant with IEEE 802.3af standards. It operates within a supply voltage range of 33 V to 66 V and features a maximum on-resistance of 3 Ohms. The device includes a current limit of 425 mA and draws a typical operating supply current of 2 mA. Designed for surface-mount installation in a DFN-14 package, it supports commercial temperature ranges from 0°C to +70°C.

Feature Summary

• Integrates PSE control logic with a high-power internal switch for compact design
• Complies with IEEE 802.3af classification protocols for PoE applications
• Provides precise current limiting and thermal protection mechanisms

Applications

• Power Sourcing Equipment (PSE) controllers for LAN infrastructure
• PoE mid-span injectors
• Network switches requiring integrated power sourcing

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free plating and RoHS compliance when ordering. Confirm the tube packaging format matches production requirements. Ensure the 'C' grade temperature rating aligns with the operational environment specifications before finalizing procurement.

Selection Notes

Select this component for designs requiring a single-chip solution for 802.3af PSE implementation. Consider the DFN-14 package size constraints and the 3 Ohm on-resistance impact on efficiency. Verify that the 425 mA current limit meets the connected Powered Device (PD) power requirements.

Part Context

This part belongs to the LTC4263 series of PoE controllers. It serves as a specialized power management IC designed to simplify the integration of Power over Ethernet capabilities into network hardware by combining control and switching functions.

Replacement Considerations

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