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LT8705IFE#TRPBF - Analog Devices

Description: 80V VIN and VOUT Synchronous 4-Switch Buck-Boost DC/DC Controller

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LT8705IFE#TRPBF - Analog Devices - PCB symbol
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PCB Footprints
LT8705IFE#TRPBF - Analog Devices PCB footprint - Other - Other - FE Package Package Variation: FE38 (31) 38-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1865 Re
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LT8705IFE#TRPBF - Analog Devices - 3D model - Other - FE Package Package Variation: FE38 (31) 38-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1865 Re
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LT8705IFE#TRPBF Details

  • Manufacturer Part Number:

    LT8705IFE#TRPBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    4.4 MM, LEAD FREE, PLASTIC, TSSOP-38

  • Pin Count:

    38

  • Manufacturer Package Code:

    05-08-1865

  • Country Of Origin:

    Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Additional Feature:

    ALSO OPERATES IN ADJUSTABLE MODE FROM 1.3V TO 80V

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    80 V

  • Input Voltage-Min:

    2.8 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    R-PDSO-G38

  • JESD-609 Code:

    e3

  • Length:

    9.7 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    38

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Voltage-Max:

    80 V

  • Output Voltage-Min:

    1.3 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HTSSOP

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    1.2 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    400 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    AUTOMOTIVE

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    4.4 mm

LT8705IFE#TRPBF Frequently Asked Questions (FAQs)

  • A good PCB layout is crucial for the LT8705's performance. Analog Devices recommends a 4-layer board with a solid ground plane, and to keep the input and output capacitors close to the IC. The datasheet provides a recommended layout, but it's also a good idea to consult with experienced engineers or use online resources for guidance.
  • To ensure good thermal performance, make sure to provide adequate heat sinking, such as a thermal pad or a heat sink attached to the IC. Also, keep the ambient temperature within the recommended range, and avoid blocking airflow around the IC. The datasheet provides thermal resistance and junction-to-case thermal resistance values to help with thermal design.
  • When selecting input and output capacitors, consider the voltage rating, capacitance value, and equivalent series resistance (ESR). The datasheet recommends using low-ESR capacitors with a voltage rating higher than the maximum input voltage. Also, ensure the capacitors are placed close to the IC and connected with short, wide traces to minimize parasitic inductance.
  • To troubleshoot issues with the LT8705, start by checking the PCB layout and component placement. Ensure that the input and output capacitors are properly connected and that the feedback network is correct. Use an oscilloscope to measure the output voltage and current, and check for signs of oscillation or instability. Consult the datasheet and application notes for guidance on troubleshooting common issues.
  • Yes, the LT8705 is suitable for high-reliability and automotive applications. It is AEC-Q100 qualified and meets the requirements for automotive systems. However, it's essential to follow proper design and manufacturing practices to ensure the device operates within its specifications and meets the required reliability standards.

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LT8705IFE#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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