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LTC3877IUK#PBF - Analog Devices

Description: Switching Voltage Regulators Dual Phase Step-Down Synchronous Regulator with VID Output Voltage Programming and Low Value DCR Sensing

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LTC3877IUK#PBF - Analog Devices - PCB symbol
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PCB Footprints
LTC3877IUK#PBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - UK Package 44-Lead Plastic QFN (7mm × 7mm)
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3D Models
LTC3877IUK#PBF - Analog Devices - 3D model - Quad Flat No-Lead - UK Package 44-Lead Plastic QFN (7mm × 7mm)
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LTC3877IUK#PBF Details

  • Manufacturer Part Number:

    LTC3877IUK#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    7 X 7 MM, LEAD FREE, PLASTIC, QFN-44

  • Pin Count:

    44

  • Manufacturer Package Code:

    05-08-1763

  • Country Of Origin:

    Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Additional Feature:

    OUTPUT VOLTAGE RANGE FROM 0.6 VOLT TO 3.5 VOLT AND 0.6 VOLT TO 5 VOLT

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    38 V

  • Input Voltage-Min:

    4.5 V

  • Input Voltage-Nom:

    15 V

  • JESD-30 Code:

    S-PQCC-N44

  • JESD-609 Code:

    e3

  • Length:

    7 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    44

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Voltage-Max:

    5 V

  • Output Voltage-Min:

    0.6 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC44,.28SQ,20

  • Package Shape:

    SQUARE

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Seated Height-Max:

    0.8 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK

  • Switching Frequency-Max:

    1000 kHz

  • Technology:

    CMOS

  • Temperature Grade:

    AUTOMOTIVE

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

  • Width:

    7 mm

LTC3877IUK#PBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LTC3877IUK#PBF involves keeping the high-current paths short and wide, using a solid ground plane, and placing the input and output capacitors close to the IC. Additionally, it's recommended to use a 4-layer board with a dedicated power plane and a separate ground plane. The datasheet provides a recommended layout diagram, but it's also a good idea to consult with experienced PCB designers and follow best practices for high-power DC-DC converter layouts.
  • Selecting the right inductor for the LTC3877IUK#PBF involves considering factors such as inductance value, saturation current, and DC resistance. The datasheet provides guidelines for inductor selection, but it's also important to consider the specific application requirements, such as output voltage, output current, and switching frequency. A good starting point is to use the inductor selection guide provided by Analog Devices, and then verify the selection through simulation and experimentation.
  • The maximum ambient temperature that the LTC3877IUK#PBF can operate in is 125°C, but this can be derated based on the specific application and operating conditions. It's important to consider the junction temperature of the IC, which can be calculated using the thermal resistance and power dissipation. The datasheet provides more information on thermal considerations and derating.
  • Troubleshooting issues with the LTC3877IUK#PBF involves a systematic approach, starting with verifying the input voltage, output voltage, and current. Check the PCB layout and component values to ensure they match the recommended values. Use an oscilloscope to check the switching waveforms and output voltage ripple. Consult the datasheet and application notes for troubleshooting guides and common pitfalls to avoid. If the issue persists, contact Analog Devices' technical support for further assistance.
  • Yes, the LTC3877IUK#PBF can be used in a synchronous rectification configuration, which can improve efficiency and reduce heat generation. However, this requires additional components, such as a synchronous rectifier FET and a driver IC. The datasheet provides some guidance on synchronous rectification, but it's recommended to consult with experienced designers and follow best practices for synchronous rectification in DC-DC converters.

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LTC3877IUK#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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