LTC4269-2 Series

IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support

Catalog

IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support

Part	Mounting Type	Supplier Device Package	Number of Channels	Current - Supply [Max]	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Type	Standards	Power - Max [Max]	Supplied Contents	Contents	Function	Utilized IC / Part
Analog Devices LTC4269CDKD-2#TRPBF	Surface Mount	32-DFN (7x4)	1	1.35 mA	60 V	37.2 V	32-WFDFN Exposed Pad	70 °C	0 °C	Controller (PD) DC/DC	802.3af (PoE) 802.3at (PoE+)	25.5 W
Analog Devices DC1335A-A										Power Management			Board(s)	Board(s)	Power Over Ethernet (POE)	LTC4269-1
Analog Devices LTC4269IDKD-2#TRPBF	Surface Mount	32-DFN (7x4)	1	1.35 mA	60 V	37.2 V	32-WFDFN Exposed Pad	85 °C	-40 °C	Controller (PD) DC/DC	802.3af (PoE) 802.3at (PoE+)	25.5 W
Analog Devices LTC4269IDKD-2#PBF	Surface Mount	32-DFN (7x4)	1	1.35 mA	60 V	37.2 V	32-WFDFN Exposed Pad	85 °C	-40 °C	Controller (PD) DC/DC	802.3af (PoE) 802.3at (PoE+)	25.5 W
Analog Devices LTC4269CDKD-1#TRPBF	Surface Mount	32-DFN (7x4)	1	1.35 mA	60 V	37.2 V	32-WFDFN Exposed Pad	70 °C	0 °C	Controller (PD) DC/DC	802.3af (PoE) 802.3at (PoE+)	25.5 W
Analog Devices LTC4269IDKD-1#TRPBF	Surface Mount	32-DFN (7x4)	1	1.35 mA	60 V	37.2 V	32-WFDFN Exposed Pad	85 °C	-40 °C	Controller (PD) DC/DC	802.3af (PoE) 802.3at (PoE+)	25.5 W
Analog Devices LTC4269IDKD-1#PBF	Surface Mount	32-DFN (7x4)	1	1.35 mA	60 V	37.2 V	32-WFDFN Exposed Pad	85 °C	-40 °C	Controller (PD) DC/DC	802.3af (PoE) 802.3at (PoE+)	25.5 W

Catalog

IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support

Key Features

• 25.5W IEEE 802.3at Compliant (Type 2) PD

• Integrated State-of-the-Art Synchronous FlybackControllerIsolated Power Supply Efficiency >92%88% Efficiency Including Diode Bridge and Hot Swap™FET

• Isolated Power Supply Efficiency >92%

• 88% Efficiency Including Diode Bridge and Hot Swap™FET

• Flexible Integrated Auxiliary Power Support

• Superior EMI Performance

• Robust 100V 0.7Ω (Typ) Integrated Hot Swap MOSFET

• IEEE 802.3at High Power Available Indicator

• Integrated Signature Resistor and Programmable Class Current

• Undervoltage, Overvoltage and Thermal Protection

• Short-Circuit Protection with Auto-Restart

• Programmable Soft-Start and Switching Frequency

• Complementary Power Good Indicators

• Thermally Enhanced 7mm × 4mm DFN Package

Description

The LTC4269-1 is an integrated Powered Device (PD) controller and switching regulator intended for high power IEEE 802.3at and 802.3af applications. The LTC4269-1 is targeted for high efficiency, single and multioutput applications from 10W to 25W. By supporting both 1-event and 2-event classifications, as defined by the IEEE, the LTC4269-1 can be used in a wide range of product configurations.The LTC4269-1 synchronous, current mode, flyback controller generates multiple supply rails in a single conversion step providing for the highest system efficiency while maintaining tight regulation across all outputs. The LTC4269-1 includes patented No-Opto feedback topology to provide full IEEE 802.3 isolation without the need of an opto-isolator circuit. A true soft-start function allows graceful ramp-up of all output voltages.All PD solutions from ADI include a shutdown pin to provide flexible auxiliary power options. The LTC4269-1 can accommodate adaptor voltages from 18V to 60V and supports both PoE or aux dominance options. The LTC4269-1 is available in a space saving 32-pin DFN package.ApplicationsVoIP Phones with Advanced Display OptionsDual-Radio Wireless Access PointsPTZ Security CamerasRFID ReadersIndustrial Controls