LTC4265CDE#PBF

LTC4265 is a 3rd generation powered device (PD) interface controller intended for IEEE 802.3at high power. It has power-over-ethernet (PoE) applications upto 25.5W. By supporting 1-event and 2-event classification signalling as defined by IEEE 802.3, it can be used in a wide range of product configurations. A 100V MOSFET isolates the DC/DC converter during detection and classification, and provides 100mA inrush current for a smooth power-up transition. It also includes complementary power good outputs, an on-board signature resistor, undervoltage/overvoltage lockout and comprehensive thermal protection. All Linear Technology PD solutions include a shutdown pin with signature corrupt to provide flexible auxiliary power options. It is used in applications such as 802.11n access points, high power VoIP video phones, RFID reader systems, PTZ security cameras and surveillance equipment etc.

• Flexible auxiliary power support using SHDN pin
• Complementary power good Outputs
• Undervoltage and overvoltage lockout
• Undervoltage lock out is 30V minimum at (TA = 25°C)
• Supply current at 60V is 1.35mA maximum at (TA = 25°C)
• Inrush current is 100mA typical at (GND = 54, VOUT = 3V)
• Operating ambient temperature is 0°C to 70°C
• Package style is 12-lead plastic DFN

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