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LT3741IUF#PBF - Analog Devices

Description: LINEAR TECHNOLOGY - LT3741IUF#PBF - DC/DC Controller, Constant Current, 6V to 36V, 1 Output, Synchronous Buck, 1.07MHz, QFN-20

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LT3741IUF#PBF - Analog Devices - PCB symbol
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PCB Footprints
LT3741IUF#PBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - UF Package 20-Lead Plastic QFN (4mm × 4mm) (Reference LTC DWG # 05-08-1710 Rev A)
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3D Models
LT3741IUF#PBF - Analog Devices - 3D model - Quad Flat No-Lead - UF Package 20-Lead Plastic QFN (4mm × 4mm) (Reference LTC DWG # 05-08-1710 Rev A)
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LT3741IUF#PBF Details

  • Manufacturer Part Number:

    LT3741IUF#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD-1, QFN-20

  • Pin Count:

    20

  • Manufacturer Package Code:

    05-08-1710

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    8.5

  • Additional Feature:

    ALSO OPERATES IN ADJUSTABLE MODE FROM 0 TO 34V

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    36 V

  • Input Voltage-Min:

    6 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    S-PQCC-N20

  • JESD-609 Code:

    e3

  • Length:

    4 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Shape:

    SQUARE

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    0.8 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    PUSH-PULL

  • Switching Frequency-Max:

    1070 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    AUTOMOTIVE

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

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

    30

  • Width:

    4 mm

LT3741IUF#PBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LT3741IUF involves keeping the high-frequency switching nodes (e.g., SW and VIN) away from sensitive analog nodes, using a solid ground plane, and minimizing trace lengths and widths to reduce parasitic inductance and capacitance. A 4-layer board with a dedicated power plane and a solid ground plane is recommended.
  • When selecting an inductor for the LT3741IUF, consider the inductor's saturation current, DC resistance, and core material. A good starting point is to choose an inductor with a saturation current rating of at least 1.5 times the maximum output current, and a DC resistance of less than 100 mΩ. Additionally, choose an inductor with a core material that can handle the switching frequency (e.g., ferrite or powdered iron for high-frequency applications).
  • The maximum ambient temperature for the LT3741IUF is 125°C, but the device can operate up to 150°C with derating. It's essential to consider the thermal design and heat sinking to ensure the device operates within its specified temperature range.
  • Yes, the LT3741IUF is qualified for automotive and high-reliability applications. It meets the AEC-Q100 standard for automotive applications and is manufactured with high-reliability processes. However, it's essential to review the device's qualification data and perform additional testing to ensure it meets the specific requirements of your application.
  • To troubleshoot issues with the LT3741IUF, start by reviewing the PCB layout and ensuring it meets the recommended layout guidelines. Check the input and output voltage waveforms using an oscilloscope to identify any signs of oscillation or instability. Verify that the input voltage is within the specified range, and the output voltage is set correctly. If issues persist, consult the datasheet and application notes for troubleshooting guides and contact Analog Devices' technical support for further assistance.

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LT3741IUF#PBF 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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