The LTC4267-1 combines an IEEE 802.3af compliant Powered Device (PD) interface with a current mode switching regulator, providing a complete power solution for PD applications. The LTC4267-1 integrates the 25k signature resistor, classification current source, thermal overload protection, signature disable and power good signal along with an undervoltage lockout optimized for use with the IEEE-required diode bridge. The LTC4267-1 provides an increased operational current limit, maximizing power available for class 3 applications. The current mode switching regulator is designed for driving a 6V rated N-channel MOSFET and features programmable slope compensation, soft-start, and constant frequency operation, minimizing noise even with light loads. The LTC4267-1 includes an on-board error amplifier and voltage reference allowing use in both isolated and nonisolated configurations. The LTC4267-1 is available in a space saving, low profile 16-pin SSOP package. Applications * IP Phone Power Management * Wireless Access Points * Security Cameras * Power over Ethernet * Complete Power Interface Port for IEEE 802®.3af Powered Device (PD) * On-board 100V, UVLO Switch * Precision Dual Level Inrush Current Limit * Integrated Current Mode Switching Regulator * On-board 25k Signature Resistor with Disable * Programmable Classification Current (Class 0-4) * Thermal Overload Protection * Power Good Signal * Integrated Error Amplifier and Voltage Reference * Low Profile 16-Pin SSOP Package https://elecena.pl/product/261208/power-over-ethernet-ieee-802-3af-pd-interface-with-integrated-switching-regulator 2007-03-04 https://elecena.pl/product/261208/power-over-ethernet-ieee-802-3af-pd-interface-with-integrated-switching-regulator 2014-06-11 https://elecena.pl/product/261208/power-over-ethernet-ieee-802-3af-pd-interface-with-integrated-switching-regulator 2025-01-20