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Datasheet Linear Technology LTC4270BIUKG#TRPBF

ManufacturerLinear Technology

12-Port PoE/PoE+/LTPoE++ PSE Controller


  • Download » Datasheet PDF, 408 Kb, Revision: D, File uploaded: Oct 25, 2017
    LTC4270/LTC4271 - 12-Port PoE/PoE+/LTPoE++ PSE Controller
    Docket ↓
    12-Port PoE/PoE+/LTPoE++
    PSE Controller
    FEATURES DESCRIPTION 12 Independent PSE Channels
    nn Compliant with IEEE 802.3at Type 1 and 2
    nn Chipset Provides Electrical Isolation
    nn Reduced BOM Cost
    nn Eliminates up to 6 High Speed Opto-Couplers
    nn Eliminates Isolated 3.3V Power Supply
    nn Low Power Dissipation
    nn 0.25О© Sense Resistance Per Channel
    nn Very High Reliability 4-Point PD Detection
    nn 2-Point Forced Voltage
    nn 2-Point Forced Current
    nn V
    EE and VPORT Monitoring
    nn 1 Second Rolling I
    PORT Averaging
    nn Supports 2-Pair and 4-Pair Output Power
    nn 1MHz I2C Compatible Serial Control Interface
    nn Available In Three Power Grades
    nn A-Grade – LTPoE++™ 38.7W to 90W
    nn B-Grade – PoE+ 25.5W ...



Package7x8 QFN-52
Package CodeUKG
Package Index05-08-1729


Number of Channels12
Demo BoardsDC1840C
Export Controlno
I2C Interfaceyes
IEEE-Compliant ClassificationOne Event, Two Event, LTPoE++
IEEE-Compliant Detection4-Point
IEEE-Compliant DisconnectionDC
Max Power90 W
Operating Temperature Range-40 to 85 °C
PoE Type1, 2, LTPoE++

Eco Plan



  • Download » Articles - LT Journal PDF, 1.1 Mb, File published: Jul 15, 2011
    LTPoE++ Extends PoE to 90W with Reliable and Easy-to-Use Standard
    Docket ↓
    July 2011 I N T H I S I S S U E RS485 and RS232
    transceivers combined in a
    single device 12 Volume 21 Number 2 LTPoE++ Extends PoE to 90W with
    Reliable and Easy-to-Use Standard
    Heath Stewart fast-acting IC protects
    sensitive circuits from
    overvoltage and reverse
    supply connections 23 microprocessor power
    supply works with FET
    drivers, DrMOS and power
    blocks 26 В±5V split-voltage power
    supply for analog circuits
    40 Power over Ethernet, or PoE, is an increasingly popular
    way to deliver both power and data over existing Ethernet
    cable, thus freeing applications from the constraint of
    AC-power proximity. As the number PoE solutions has
    grown so has the applications’ appetite for power.
    A new proprietary standard, LTPoE++в„ў, satisfies this hunger
    by extending the PoE and PoE+ specifications to 90W of PD
    delivered power. LTPoE++ also dramatically reduces engineering
    complexity in power sourcing equipment (PSEs) and powered
    devices (PDs) when compared to other power-expansion solutions.
    Plug-and-play simplicity and safe, robust ...

Moldel Line

Series: LTC4270 (6)

Manufacturer's Classification

  • Monitor, Control and Protection > Power-over-Ethernet (PoE) Interface Controllers > PoE Power Sourcing Equipment (PSE)

Other Names:


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