LTC4263CDE-1#TRPBF

Overview

The LTC4263CDE-1#TRPBF is a Power Sourcing Equipment (PSE) controller with an integrated high-side 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 of quiescent current. Designed for surface-mount installation in a DFN-14 package, it functions between 0°C and +70°C.

Feature Summary

• Integrates a PSE controller with a high-side power switch for single-port PoE applications
• Complies with IEEE 802.3af classification and signaling protocols
• Includes internal circuitry for port detection, classification, and power delivery management

Applications

• IEEE 802.3af Power Sourcing Equipment designs
• Single-port LAN power injection modules
• PoE midspan power injectors
• Network interface cards requiring integrated PSE functionality

Procurement Notes

Verify the specific suffix #TRPBF confirms the tape-and-reel packaging format required for automated assembly processes. Confirm that the C-grade temperature rating aligns with the operational environment specifications. Ensure the DFN-14 footprint matches the PCB layout design constraints before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring a compact, single-chip solution for 802.3af compliance. The integrated switch reduces external component count compared to discrete solutions. Consider the DFN-14 package size for space-constrained layouts and verify thermal dissipation requirements given the 3 Ohm on-resistance under load conditions.

Part Context

This part belongs to the LTC4263-1 series from Analog Devices, specialized for Power over Ethernet applications. It serves as a complete solution for managing power delivery on a single LAN port. The series supports standard classification levels defined by the IEEE 802.3af protocol, enabling interoperability with compliant Powered Devices.

FAQ

Does the LTC4263CDE-1#TRPBF support IEEE 802.3at?

No, this component is designed specifically for IEEE 802.3af compliance and does not support the higher power requirements of the 802.3at standard.

What is the maximum operating supply voltage?

The device operates with a supply voltage range extending up to 66 V.