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LT4276CIUFD#TRPBF - Analog Devices

Description: Power Over Ethernet Controller 1 Channel 802.3af (PoE) 28-QFN (4x5)

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LT4276CIUFD#TRPBF - Analog Devices - PCB symbol
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LT4276CIUFD#TRPBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - UFD Package 28-Lead Plastic QFN (4
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LT4276CIUFD#TRPBF - Analog Devices - 3D model - Quad Flat No-Lead - UFD Package 28-Lead Plastic QFN (4
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LT4276CIUFD#TRPBF Details

  • Manufacturer Part Number:

    LT4276CIUFD#TRPBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    QFN-28

  • Pin Count:

    28

  • Manufacturer Package Code:

    05-08-1712

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    CONSTANT FREQUENCY

  • Input Voltage-Max:

    60 V

  • Input Voltage-Nom:

    40 V

  • JESD-30 Code:

    R-PQCC-N28

  • JESD-609 Code:

    e3

  • Length:

    5 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    28

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Shape:

    RECTANGULAR

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    0.8 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    320 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    4 mm

LT4276CIUFD#TRPBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LT4276 involves keeping the input and output traces short and wide, using a solid ground plane, and placing the input and output capacitors close to the device. Additionally, it's recommended to use a Kelvin connection for the sense pins to minimize errors.
  • To ensure accurate voltage sensing, it's essential to use a low-impedance source, keep the sense pins short and Kelvin-connected, and avoid routing high-current traces near the sense pins. Additionally, the sense pins should be connected to a low-impedance point in the system, such as the output of a voltage regulator.
  • The maximum allowed voltage on the EN pin of the LT4276 is 6V. Exceeding this voltage can damage the device. It's recommended to use a voltage divider or a level shifter to ensure the EN pin voltage remains within the specified range.
  • Yes, the LT4276 can be used with a switching regulator. However, it's essential to ensure that the switching frequency is above 100 kHz to avoid interference with the LT4276's internal oscillator. Additionally, the output voltage of the switching regulator should be filtered to minimize ripple and noise.
  • The power dissipation of the LT4276 can be calculated using the formula: Pd = (VIN x IIN) + (VOUT x IOUT). Where VIN is the input voltage, IIN is the input current, VOUT is the output voltage, and IOUT is the output current. The calculated power dissipation should be within the specified maximum power dissipation rating of the device.

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LT4276CIUFD#TRPBF Overview

Use the download button to access the LT4276CIUFD#TRPBF schematic symbol, PCB footprint, and 3D model.
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About Analog Devices

Analog Devices Inc. is a global leader in the design and manufacturing of analog, mixed-signal, and digital signal processing integrated circuits and software solutions for the industrial, automotive, healthcare, communications industries. Analog Devices serves a diverse range of markets including industrial, automotive, healthcare, energy, aerospace, defense, and consumer electronics industries. Analog Devices’ product portfolio includes a wide range of ICs, modules, and subsystems.

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