MAX5991A - Maxim

MAX5991A (MAX5991A/B) IEEE 802.3af-Compliant / High-Efficiency / Class 1 / Class 2 / Powered Devices

The MAX5991A/MAX5991B provide a complete powersupply solution as IEEE® 802.3af-compliant Class 1/ Class 2 Powered Devices (PDs) in a Power-over-Ethernet (PoE) system. The devices integrate the PD interface with an efficient DC-DC converter, offering a low external part count PD solution. The devices also include a low-dropout regulator, MPS, sleep, and ultra.

Features

S IEEE 802.3af Compliant S PoE Class 1/Class 2 Classification S Intelligent Maintain Power Signature (MPS) S Sleep and Ultra-Low Power Mode S Simplified Wall Adapter Interface S Efficient, Integrated DC-DC Converter (with Integrated Switches) S 8.7V to 60V Wide Input Voltage Range S 3.2V to 14V Programmable Output Voltage Range S Internal Compensation S Fixed 430kHz Switching Frequency S Frequency Foldback for High-Efficiency LightLoad Operation S Built-In Output-Voltage Monitoring S Open-Drain RESET Output http://www.DataSheet4U.net/ S Protects Against Overload, Output Short Cir.