LTC4267CGN

The LTC4267CGN is an integrated circuit designed for power over Ethernet (PoE) applications, facilitating the delivery of electrical power along with data over standard Ethernet cabling. Manufactured by Analog Devices, this device integrates a powered device (PD) interface controller with a switching regulator designed for use in Ethernet-powered devices. It supports the IEEE 802.3af standard, ensuring compatibility with existing PoE infrastructure.
The IC manages the detection and classification of PoE power, allowing efficient power conversion and regulation. It operates with an input voltage range that matches PoE standards and typically provides a regulated output suitable for powering a variety of Ethernet-connected devices like IP cameras, VoIP phones, and wireless access points.
The LTC4267CGN incorporates features such as over-current protection, thermal protection, and power sequencing to ensure reliable and safe operation. It also offers options for external components configuration, allowing flexibility in design to meet specific power requirements. The device comes in a compact SSOP package, making it suitable for space-constrained applications.

The LTC4267CGN is a Power over Ethernet (PoE) interface controller with an integrated DC-DC converter, designed for powered device (PD) applications. Key features include:
1. IEEE 802.3af Compliance: It supports the IEEE 802.3af standard, ensuring compatibility with PoE systems by managing power detection, classification, and inrush control.
2. Integrated DC-DC Converter: Features a high-efficiency DC-DC converter, capable of operating in flyback, forward, or buck topologies, which provides design flexibility for different power requirements.
3. Input Voltage Range: The device supports an input voltage range from 36V to 57V, accommodating the typical voltage range for PoE systems.
4. Programmable Classification: Allows the user to set the classification signature class (0-4), facilitating proper power allocation and management in networked applications.
5. Thermal Protection: Includes thermal overload protection to prevent damage from excessive heat, enhancing device reliability.
6. Signature Resistor Detection: Ensures accurate detection by the power sourcing equipment (PSE) through a precision resistor network.
7. Compact Package: Available in a compact 16-pin SSOP package, suitable for space-constrained designs.
These features make the LTC4267CGN ideal for applications like IP phones, wireless access points, and network cameras.

The LTC4267CGN is typically housed in a 16-lead narrow SSOP (Shrink Small Outline Package). This package is designed for surface mounting on PCBs, providing a compact and efficient form factor for Power over Ethernet applications.

The LTC4267CGN is an integrated circuit designed by Analog Devices (formerly Linear Technology) that functions as a Power over Ethernet (PoE) Powered Device (PD) interface, which includes a DC/DC converter controller. It is used to convert power delivered over Ethernet cables to a form usable by Ethernet-connected devices.
The LTC4267CGN is typically packaged in a 16-lead SSOP (Shrink Small Outline Package) or GN package. Its main functions include detection, classification, and power delivery in accordance with the IEEE 802.3af standard for PoE. It integrates an efficient DC/DC converter controller that supports both isolated and non-isolated applications, allowing the design of versatile power supply systems for Ethernet-powered devices. The device also features thermal protection, current limiting, and undervoltage lockout for safe operation.
In summary, the LTC4267CGN is a 16-pin device that combines PoE PD interface capabilities with a DC/DC converter controller to enable the design of power supply systems compliant with Ethernet standards.

The LTC4267CGN is manufactured by Linear Technology Corporation. Linear Technology, now part of Analog Devices, Inc., is a company that specializes in designing and manufacturing a broad range of integrated circuits, including power management solutions, data converters, signal conditioning circuits, RF and interface ICs, μModule subsystems, and wireless sensor network products. The company is known for producing high-performance analog integrated circuits that are used in a variety of applications across industries such as telecommunications, computing, automotive, industrial, and healthcare. Their products are often chosen for their reliability, precision, and efficiency in demanding applications.

The LTC4267CGN is a Power over Ethernet (PoE) interface controller used in applications requiring both power and data over a single Ethernet cable. It is suitable for use in IP telephones, wireless access points, security cameras, and other networked devices needing remote power sourcing. The LTC4267CGN integrates an 802.3af-compliant powered device (PD) interface with a DC/DC converter controller, making it ideal for simplifying design and reducing component count in PoE-enabled applications.

The LTC4267CGN, a Power over Ethernet (PoE) controller, can be compared with equivalent products like the Texas Instruments TPS23753A, Silvertel AG5300, ON Semiconductor NCP1095, and Microchip's PD70224. These components provide similar PoE functionalities, such as powered device control and power management for Ethernet applications. However, specifications may vary, so it's essential to review datasheets to ensure compatibility with your needs.