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LT4276AHUFD#TRPBF - Analog Devices

Description: LTPoE++/PoE+/PoE PD Forward/Flyback Controller

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LT4276AHUFD#TRPBF - Analog Devices - PCB symbol
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PCB Footprints
LT4276AHUFD#TRPBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - 28-Lead Plastic QFN (4mm × 5mm
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LT4276AHUFD#TRPBF - Analog Devices - 3D model - Quad Flat No-Lead - 28-Lead Plastic QFN (4mm × 5mm
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LT4276AHUFD#TRPBF Details

  • Manufacturer Part Number:

    LT4276AHUFD#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:

    125 °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:

    AUTOMOTIVE

  • 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

LT4276AHUFD#TRPBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LT4276AHUFD#TRPBF 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 separate analog and digital ground plane to minimize noise coupling.
  • To ensure reliable operation over the entire operating temperature range, it's essential to follow proper thermal design and layout guidelines. This includes providing adequate heat sinking, using a thermally conductive PCB material, and keeping the device away from heat sources. Additionally, it's recommended to derate the device's power dissipation according to the ambient temperature.
  • Operating the LT4276AHUFD#TRPBF outside the recommended input voltage range can affect its performance and reliability. Using a lower input voltage may result in reduced output voltage accuracy, increased noise, and decreased efficiency. Using a higher input voltage may cause the device to overheat, leading to reduced reliability and lifespan.
  • To troubleshoot issues with the output voltage accuracy or stability, start by verifying the input voltage and current, as well as the output load. Check for any signs of overheating, and ensure that the device is properly soldered and mounted. Use an oscilloscope to measure the output voltage ripple and noise, and consult the datasheet for guidance on adjusting the output voltage and compensation networks.
  • The LT4276AHUFD#TRPBF is a switching regulator, which can generate electromagnetic interference (EMI) and radio-frequency interference (RFI). To minimize EMI and RFI, use a shielded enclosure, keep the device and its associated components away from sensitive circuits, and use EMI filters or shielding on the input and output lines. Additionally, follow proper PCB layout and grounding techniques to reduce radiation.

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LT4276AHUFD#TRPBF Overview

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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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