XS2105M provides a complete interface for Power Devices (PD) in Ethernet Power over Ethernet (PoE) systems to comply with the IEEE 802.3 af standard. It offers detection signals, classification signals, and an integrated isolated power switch with surge current control. During surge events, XS2105M limits the current to 180 mA until the isolated power MOSFET is fully turned on, at which point it switches to a higher current limit (Typ.: 480 mA). The device features input undervoltage lockout (UVLO) with a wide hysteresis and long-duration pulse shielding to compensate for resistive losses in twisted-pair cables, ensuring interference-free transmission during power-on and power-off. XS2105M can withstand input voltages up to 100V.