LTC4263IDE#PBF

Overview

The LTC4263IDE#PBF is a single 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 limits current to 425 mA and draws 2 mA during operation. 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
• Supports legacy device detection through high capacitance sensing capabilities
• Ensures compliance with IEEE 802.3af Power over Ethernet specifications

Applications

• IEEE 802.3af compliant Power over Ethernet systems
• Single-port PoE power sourcing equipment designs
• LAN infrastructure power distribution units

Procurement Notes

Verify the exact suffix against official Analog Devices documentation, as variations such as #TRPBF or #PBF indicate distinct packaging formats like tape-and-reel versus tubes. Confirm availability status directly with the manufacturer or authorized distributors, as restricted supply conditions may apply to specific lot dates or regional allocations.

Selection Notes

Select this component for applications requiring a single-channel PoE solution with integrated switching. Ensure the design accommodates the DFN-14 thermal requirements and the 33 V to 66 V input range. Verify that the 425 mA current limit aligns with the connected Powered Device's power budget requirements.

Part Context

This part belongs to the LTC4263-1 series of Power Switch ICs designed for LAN applications. It serves as a specialized solution for managing power delivery over Ethernet cables, distinguishing itself from general-purpose switches by incorporating protocol-specific detection and classification logic required for PoE compliance.

Replacement Considerations

Consult official Analog Devices cross-reference guides for verified substitutes. Potential alternatives within the family include variants with different temperature grades or packaging options, provided they maintain identical pinout and electrical characteristics.