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LTC3851IUD#PBF - Analog Devices

Description: Buck Regulator Positive Output Step-Down DC-DC Controller IC 16-QFN (3x3) , 4V ~ 38V , 250kHz ~ 750kHz , -40°C ~ 125°C (TJ)

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LTC3851IUD#PBF - Analog Devices - PCB symbol
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PCB Footprints
LTC3851IUD#PBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - UD Package 16-Lead Plastic QFN (3mm × 3mm)
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3D Models
LTC3851IUD#PBF - Analog Devices - 3D model - Quad Flat No-Lead - UD Package 16-Lead Plastic QFN (3mm × 3mm)
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LTC3851IUD#PBF Details

  • Manufacturer Part Number:

    LTC3851IUD#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    3 X 3 MM, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16

  • Pin Count:

    16

  • Manufacturer Package Code:

    05-08-1691

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Additional Feature:

    ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 5.5V

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    38 V

  • Input Voltage-Min:

    4 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    S-PQCC-N16

  • JESD-609 Code:

    e3

  • Length:

    3 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    16

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    0.05 A

  • Output Voltage-Max:

    5.5 V

  • Output Voltage-Min:

    0.8 V

  • 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:

    790 kHz

  • Technology:

    CMOS

  • 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:

    3 mm

LTC3851IUD#PBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LTC3851IUD#PBF involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the traces between the IC and the capacitors. Additionally, it's recommended to use a separate analog ground plane and to keep the switching node (SW pin) away from sensitive analog nodes.
  • When selecting an inductor for the LTC3851IUD#PBF, 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 100mΩ. Additionally, consider using a shielded inductor to reduce EMI.
  • The LTC3851IUD#PBF can operate in ambient temperatures up to 125°C, but the maximum junction temperature (TJ) should not exceed 150°C. It's recommended to ensure good airflow and heat sinking to keep the junction temperature within the recommended range.
  • Yes, the LTC3851IUD#PBF is qualified for automotive and high-reliability applications. It meets the requirements of the AEC-Q100 standard for automotive applications, and is also suitable for use in high-reliability industrial and medical applications.
  • To troubleshoot issues with the LTC3851IUD#PBF, start by checking the PCB layout and ensuring that it meets the recommended layout guidelines. Next, verify that the input and output capacitors are properly selected and placed. Use an oscilloscope to check for oscillation or instability, and ensure that the switching frequency is within the recommended range. Finally, check the input voltage and output load to ensure they are within the recommended specifications.

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LTC3851IUD#PBF Overview

Use the download button to access the LTC3851IUD#PBF schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like LTC38, or try a keyword search, such as Switching Regulator or Controllers

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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