LTC4265 Series

IEEE 802.3 at High Power PD Interface Controller with 2-Event Classification Recognition

Catalog

IEEE 802.3 at High Power PD Interface Controller with 2-Event Classification Recognition

Part	Power - Max [Max]	Mounting Type	Internal Switch(s)	Current - Supply	Package / Case	Standards	Number of Channels	Auxiliary Sense	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Max]	Voltage - Supply [Min]
Analog Devices LTC4265CDE#TRPBF	25.5 W	Surface Mount		1.35 mA	12-WFDFN Exposed Pad	802.3af (PoE) 802.3at (PoE+)	1		12-DFN (4x3)	70 °C	0 °C	60 V	37.2 V
Analog Devices LTC4265CDE#PBF	25.5 W	Surface Mount		1.35 mA	12-WFDFN Exposed Pad	802.3af (PoE) 802.3at (PoE+)	1		12-DFN (4x3)	70 °C	0 °C	60 V	37.2 V

Catalog

IEEE 802.3 at High Power PD Interface Controller with 2-Event Classification Recognition

Key Features

• IEEE 802.3af/at Powered Device (PD) Controller

• IEEE 802.3at 2-event Classification Signaling

• Programmable Classification Current

• Flexible Auxiliary Power Support Using SHDN Pin

• Rugged 100V Onboard MOSFET with 100mA Inrush Current Limit.

• Complementary Power Good Outputs

• Onboard Signature Resistor

• Comprehensive Thermal Protection

• Undervoltage and Overvoltage Lockout

• 12-Lead, 4mm × 3mm DFN Package

Description

The LTC4265 is a 3rd generation Powered Device (PD) Interface controller intended for IEEE 802.3at high power Power-over-Ethernet (PoE) applications up to 25.5W. By supporting 1-event and 2-event classification signaling as defined by IEEE 802.3, the LTC4265 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. The LTC4265 also includes complementary power good outputs, an on-board signature resistor, undervoltage/overvoltage lockout and comprehensive thermal protection. All PD solutions from ADI include a shutdown pin with signature corrupt to provide flexible auxiliary power options.The LTC4265 PD interface controller can be used along with a variety of DC/DC converter products to provide a complete, cost effective power solution for high power PD applications.The LTC4265 is available in the space-saving low profile (4mm × 3mm) DFN package and is drop-in compatible with the LTC4264.Applications802.11n Access PointsHigh Power VoIP Video PhonesRFID Reader SystemsPTZ Security Cameras and Surveillance Equipment