LTC4263IS#PBF

Overview

The LTC4263IS#PBF is a single-port Power Sourcing Equipment (PSE) controller compliant with IEEE 802.3af standards, manufactured by Analog Devices Inc. It integrates a high-voltage power switch and control logic for PoE applications. The device operates within a supply voltage range of 33 V to 66 V and features a maximum current limit of 425 mA. The internal switch has a maximum on-resistance of 3 Ohms. It supports operation temperatures from 0°C to +70°C and is housed in a 14-lead DFN package.

Feature Summary

• Integrates a high-voltage power switch with the PSE controller logic
• Compliant with IEEE 802.3af Power over Ethernet standards
• Supports legacy device detection via high capacitance sensing

Applications

• IEEE 802.3af compliant Power Sourcing Equipment designs
• Single-port PoE network infrastructure systems
• High-power LAN interface circuits requiring integrated switching

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout and electrical characteristics. Ensure the component matches the required operating temperature range and package type for your design. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and availability status before procurement.

Selection Notes

Select this component for single-port PoE applications requiring compliance with IEEE 802.3af. It is suitable for designs needing an integrated high-voltage switch to simplify bill of materials. Consider the DFN package size and thermal performance relative to your PCB layout constraints and ambient operating conditions.

Part Context

This part belongs to the LTC4263 series of PoE controllers from Analog Devices. It is designed specifically for powering remote devices over Ethernet cabling. The series includes variants optimized for different port counts and standard compliance levels, providing a scalable solution for network equipment manufacturers.

Replacement Considerations

Consult official Analog Devices documentation for verified substitute part numbers. Do not assume functional equivalence with other PoE controllers without verifying pin compatibility and electrical specifications.