LT4275CIMS#PBF

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LTPOE++/POE+/POE PD CONTROLLER

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LT4275CIMS#PBF

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Analog Devices

LTPOE++/POE+/POE PD CONTROLLER

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DocumentsDatasheet R572 Reliability Data +1

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LT4275CIMS#PBF

Auxiliary Sense	True
Internal Switch(s)	False
Mounting Type	Surface Mount
Number of Channels	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	10-MSOP, 10-TFSOP
Package / Case [x]	3 mm
Package / Case [x]	0.118 in
Power - Max [Max]	13 W
Standards	802.3af (PoE)
Supplier Device Package	10-MSOP
Voltage - Supply [Max]	60 V
Voltage - Supply [Min]	23 V

LT4275 Series

Part	Package / Case	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Min]	Voltage - Supply [Max]	Power - Max [Max]	Standards	Number of Channels	Supplier Device Package	Package / Case [x]	Package / Case [x]	Type	Supplied Contents	Utilized IC / Part	Function	Primary Attributes	Contents
Analog Devices LT4275CIDD#PBF	10-WFDFN Exposed Pad	Surface Mount	85 °C	-40 °C	23 V	60 V	13 W	802.3af (PoE)	1	10-DFN (3x3)
Analog Devices LT4275BHMS#TRPBF	10-MSOP 10-TFSOP	Surface Mount	125 °C	-40 °C	23 V	60 V	25.5 W	802.3af (PoE) 802.3at (PoE+)	1	10-MSOP	3 mm	0.118 in
Analog Devices LT4275AIMS#TRPBF	10-MSOP 10-TFSOP	Surface Mount	85 °C	-40 °C	23 V	60 V	90 W	802.3af 802.3at LTPoE++	1	10-MSOP	3 mm	0.118 in
Analog Devices LT4275AHDD#PBF	10-WFDFN Exposed Pad	Surface Mount	125 °C	-40 °C	23 V	60 V	90 W	802.3af 802.3at LTPoE++	1	10-DFN (3x3)
Analog Devices LT4275CIMS#PBF	10-MSOP 10-TFSOP	Surface Mount	85 °C	-40 °C	23 V	60 V	13 W	802.3af (PoE)	1	10-MSOP	3 mm	0.118 in
Analog Devices LT4275CHDD#TRPBF	10-WFDFN Exposed Pad	Surface Mount	125 °C	-40 °C	23 V	60 V	13 W	802.3af (PoE)	1	10-DFN (3x3)
Analog Devices DC1788B-A													Power Management	Board(s)	LT4275	Power Over Ethernet (POE)	LTPoE++ PoE PoE+	Board(s)

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 4.28
		10	$ 2.83
		25	$ 2.45
		100	$ 2.03
		250	$ 1.82
		500	$ 1.70
		1000	$ 1.59
		2500	$ 1.48
		5000	$ 1.41

Description

General part information

LT4275 Series

The LT4275 is a pin-for-pin compatible family of IEEE 802.3 and LTPoE++ powered device (PD) controllers.The LT4275A employs a proprietary LTPoE++ classification scheme, delivering 38.7W, 52.7W, 70W or 90W of power at the PD RJ45 connector. The LT4275A is fully compatible with IEEE 802.3. The LT4275B is an IEEE 802.3at compliant, Type 2 (PoE+) PD delivering up to 25.5W. The LT4275C is an IEEE 802.3af compliant, Type 1 (PoE) PD delivering up to 13W.The LT4275 internal charge pump provides an N-channel MOSFET solution, eliminating a larger and more costly P-channel MOSFET. A low RDS(ON)MOSFET also maximizes power delivery and efficiency, reduces power and heat dissipation, and eases thermal design. Startup inrush current is adjustable with an external capacitor. The LT4275 also includes a power good output, on-board signature resistor, undervoltage lockout, and thermal protection. The LT4275A/LT4275B drives a single opto-coupler to indicate the power level of the attached PSE. Pin-selectable support for non-standard low voltage operation is provided. Auxiliary power override is supported with the AUX pin.The LT4275A can be configured to support all possible LTPoE++, 802.3at and 802.3af power levels with external component changes.ApplicationsHigh Power Wireless Data SystemsOutdoor Security Camera EquipmentCommercial and Public Information DisplaysHigh Temperature Industrial Applications

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Datasheet

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Reliability Data

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Reliability Data