FEATURES
n IEEE 802.3af/at and LTPoE++™ Powered Device (PD) Controller n LTPoE++ Supports Power Levels Up to 90W n LT4275A Supports All of the Following Standards: n LTPoE++ 38.7W, 52.7W, 70W and 90W n IEEE 802.3at 25.5W Compliant n IEEE 802.3af Up to 13W Compliant n LT4275B is IEEE 802.3at/af Compliant n LT4275C is IEEE 802.3af Compliant n 100V Absolute Maximum Input Voltage n Wide Junction Temperature Range (–40°C to 125°C) n Overtemperature Protection n Integrated Signature Resistor n External Hot Swap™ N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency n Programmable Aux Power Support as Low as 9V n Optional Support of Non-Standard Low Voltage PoE n Available in 10-Lead MSOP and 3mm × 3mm DFN Packages APPLICATIONS
n High Power Wireless Data Systems n Outdoor Security Camera Equipment n Commercial and Public Information Displays n High Temperature Industrial APPLICATIONS
LT4275 LTPoE++/PoE+/PoE PD Controller DESCRIPTION
The LT®4275 is a pin-for-pin compatible family of IEEE 802.3 and LTPoE++ powered device (PD) controllers.
Linear Technology
