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LT4276CHUFD#TRPBF - Analog Devices

Description: 28-Lead (4mm × 5mm) Plastic QFN

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LT4276CHUFD#TRPBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - 28-Lead Plastic QFN (4mm × 5mm)
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LT4276CHUFD#TRPBF - Analog Devices  - 3D model - Quad Flat No-Lead - 28-Lead Plastic QFN (4mm × 5mm)
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LT4276CHUFD#TRPBF Details

  • Manufacturer Part Number:

    LT4276CHUFD#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

LT4276CHUFD#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 separate analog and digital ground plane to minimize noise coupling.
  • To ensure proper power-up and power-down of the LT4276, it's recommended to follow a specific power-up sequence. First, power up the VCC pin, then the VIN pin, and finally the EN pin. During power-down, reverse this sequence. Additionally, make sure to add a soft-start capacitor to the EN pin to prevent inrush currents.
  • The LT4276 is rated for operation from -40°C to 125°C ambient temperature range. However, the device's performance and reliability may degrade at extreme temperatures, so it's recommended to operate within a narrower temperature range for optimal performance.
  • Yes, the LT4276 is designed to operate in high-vibration environments. However, it's recommended to follow proper PCB mounting and assembly techniques to ensure the device is securely attached to the board. Additionally, consider using a vibration-resistant capacitor for the input and output capacitors.
  • To troubleshoot issues with the LT4276, start by checking the input and output voltages, as well as the device's operating frequency. Use an oscilloscope to check for noise, ringing, or oscillations on the output. Also, verify that the device is properly powered up and down, and that the input and output capacitors are properly sized and placed.

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LT4276CHUFD#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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