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LTC3777ELXE#PBF - Analog Devices

Description: Switching Controllers 150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller + 150V Switching Bias Supply

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LTC3777ELXE#PBF - Analog Devices - PCB symbol
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LTC3777ELXE#PBF - Analog Devices PCB footprint - Quad Flat Packages - Quad Flat Packages - LXE Package 48-Lead Plastic Exposed Pad LQFP (7mm × 7mm)
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LTC3777ELXE#PBF - Analog Devices - 3D model - Quad Flat Packages - LXE Package 48-Lead Plastic Exposed Pad LQFP (7mm × 7mm)
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LTC3777ELXE#PBF Details

  • Manufacturer Part Number:

    LTC3777ELXE#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    LQFP-48

  • Pin Count:

    48

  • Manufacturer Package Code:

    05-08-1832

  • Country Of Origin:

    South Korea

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Date Of Intro:

    2018-01-25

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    9

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    BURST MODE

  • Input Voltage-Max:

    150 V

  • Input Voltage-Min:

    4.5 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    S-PQFP-G48

  • JESD-609 Code:

    e3

  • Length:

    7 mm

  • Moisture Sensitivity Level:

    3

  • Number of Functions:

    1

  • Number of Terminals:

    48

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Voltage-Max:

    150 V

  • Output Voltage-Min:

    1.2 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HLFQFP

  • Package Shape:

    SQUARE

  • Package Style:

    FLATPACK, HEAT SINK/SLUG, LOW PROFILE, FINE PITCH

  • Seated Height-Max:

    1.6 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    550 kHz

  • Technology:

    CMOS

  • Temperature Grade:

    AUTOMOTIVE

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

  • Width:

    7 mm

LTC3777ELXE#PBF Frequently Asked Questions (FAQs)

  • The maximum input voltage that can be applied to the LTC3777 is 60V, but it's recommended to keep it below 50V for optimal performance and reliability.
  • To minimize EMI, keep the input and output capacitors close to the IC, use a solid ground plane, and keep the high-frequency switching nodes (e.g., LX and SW) away from sensitive analog nodes. Also, use a shielded inductor and orient it to minimize radiation.
  • The recommended PCB layout for the LTC3777 includes a 4-layer board with a solid ground plane, a separate power plane for the input voltage, and a separate plane for the output voltage. Keep the high-frequency nodes (e.g., LX and SW) on the top layer, and use vias to connect to the inner layers.
  • Select an inductor with a high saturation current rating, low DC resistance, and a high self-resonant frequency. The inductor value should be chosen based on the output voltage, output current, and switching frequency. A good starting point is to use an inductor with a value between 1.5uH to 3.3uH.
  • The maximum output current that the LTC3777 can deliver is 7A, but it's recommended to derate the output current based on the ambient temperature, input voltage, and output voltage to ensure reliable operation.

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LTC3777ELXE#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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