Analog Devices Inc. LTC4257CDD-1#TRPBF Overview

The LTC4257CDD-1#TRPBF is a sophisticated Power over Ethernet (PoE) interface controller from Analog Devices Inc., designed to simplify the implementation of Power Sourcing Equipment (PSE). It is a critical component for network devices like switches and hubs, which provide power to connected Power over Ethernet devices such as IP cameras, VoIP phones, and wireless access points.

Key Features

• IEEE 802.3af Compliant: This controller adheres to the IEEE 802.3af standard, ensuring compatibility with other compliant devices and providing a safe and reliable PoE solution.
• Integrated Power Device: The LTC4257CDD-1#TRPBF integrates the necessary power MOSFET, which simplifies the design and reduces external component requirements.
• Automatic Classification: It supports the PoE classification protocol, automatically determining the power classification of the powered device (PD) and delivering the appropriate power level.
• Current Limiting and Thermal Protection: Built-in current limiting features protect the power supply from overcurrent conditions, while thermal protection ensures the device operates within safe temperature ranges.
• Compact Package: Housed in a small 10-lead DFN package, the LTC4257CDD-1#TRPBF is ideal for space-constrained applications.

Applications

The LTC4257CDD-1#TRPBF is versatile and can be used in a variety of network equipment and applications requiring Power over Ethernet capabilities, including:

• Enterprise networking switches and routers
• Industrial Ethernet switches
• Home networking equipment
• VoIP phone systems
• Networked surveillance cameras
• Wireless access points

Product Specifications

The LTC4257CDD-1#TRPBF operates over a wide supply voltage range and is characterized by its low power dissipation and robust feature set. Detailed technical specifications include:

• Supply Voltage Range: 44V to 57V
• Operating Temperature Range: -40°C to 85°C
• Package: 10-lead (3mm × 3mm) DFN
• RoHS Compliant: Yes

With its combination of features, the LTC4257CDD-1#TRPBF from Analog Devices Inc. is an excellent choice for designers looking to integrate PoE capabilities into their network products with minimal complexity and maximum efficiency.