The LT4275CIDD#PBF from Analog Devices Inc. is a highly versatile Power over Ethernet (PoE) powered device (PD) interface that integrates a robust and efficient switching regulator. Designed to support LTPoE++™ up to 90W, PoE+ up to 25.5W, and PoE (IEEE 802.3af) applications, this product simplifies the task of designing PDs that need to extract power from PoE Ethernet networks.

With a wide input voltage range of 12V to 57V, the LT4275CIDD#PBF is suitable for a variety of applications, including remote sensors, wireless network access points, security cameras, and other networked devices that benefit from being powered over the Ethernet cable, eliminating the need for an external power supply.

The device features a high-efficiency integrated switching regulator that operates over a wide input voltage range, providing a flexible solution for various output voltage requirements. This integration helps reduce external component count, saving board space and simplifying the design process.

The LT4275CIDD#PBF also includes numerous protection features, such as overcurrent protection, thermal shutdown, and signature resistor disconnect, which contribute to the longevity and reliability of the end product. The PD interface detects and classifies the power level needed for the PD and includes an onboard MOSFET to provide seamless power extraction from the PoE supply.

Key features of the LT4275CIDD#PBF include:

• Support for LTPoE++™, PoE+ (IEEE 802.3at), and PoE (IEEE 802.3af)
• Integrated high-efficiency switching regulator
• Wide input voltage range: 12V to 57V
• Robust protection features for enhanced reliability
• Compact DFN package for space-constrained applications

The LT4275CIDD#PBF is available in a small, thermally enhanced 10-lead DFN package, which is RoHS compliant and suitable for commercial and industrial temperature ranges. This product is a reliable and efficient solution for designers looking to integrate PoE capability into their devices with minimal additional components and complexity.