LTC9111RDE#TRPBF

Overview

The LTC9111RDE#TRPBF is an IEEE 802.3cg compliant Single-Pair Power over Ethernet (SPoE) Powered Device controller manufactured by Analog Devices Inc. It operates within a wide input voltage range of 2.3V to 60V and features polarity correction capabilities. The device supports Serial Communication Classification Protocol (SCCP) for efficient power management. It integrates a 3.5V standby regulator and draws a maximum current of 150μA during classification. The component drives external low-side N-channel MOSFETs with a start-up voltage as low as 1.6V. It is available in a 12-pin MSOP package.

Feature Summary

• IEEE 802.3cg compliance for SPoE applications
• Supports SCCP-based classification
• Integrated 3.5V standby regulator
• Pin programmable class configuration

Applications

• Building automation systems
• Factory automation systems
• Classification-based SPoE powered devices

Procurement Notes

Verify the specific suffix RDE corresponds to the 12-pin MSOP package variant when sourcing. Confirm that the TRPBF designation indicates tape and reel packaging. Ensure compatibility with external N-channel MOSFETs for polarity correction circuits. Validate supply chain authenticity through authorized Analog Devices distributors. Check for any recent product change notices affecting pinout or electrical characteristics.

Selection Notes

Select this controller for designs requiring strict adherence to IEEE 802.3cg standards. Consider its wide input voltage range for robust operation across varying network conditions. Evaluate the low classification current for minimizing reservoir capacitor requirements. Assess the need for pin-programmable class configuration against system flexibility needs. Verify thermal performance within the MSOP package for the intended application environment.

Part Context

The LTC9111 series serves as a specialized controller for Single-Pair Power over Ethernet implementations. It addresses the growing demand for simplified cabling in industrial and building automation sectors. By integrating classification logic and drive capabilities, it reduces external component count. This family enables designers to implement compliant PD solutions without complex discrete circuitry.

Replacement Considerations

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