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LT8705AIUHF#TRPBF - Analog Devices

Description: Buck-Boost Regulator Positive Output Step-Up/Step-Down DC-DC Controller IC 38-QFN (5x7)

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LT8705AIUHF#TRPBF - Analog Devices - PCB symbol
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LT8705AIUHF#TRPBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - UHF Package 38-Lead Plastic QFN (5mm × 7mm)_2025-1
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LT8705AIUHF#TRPBF - Analog Devices - 3D model - Quad Flat No-Lead - UHF Package 38-Lead Plastic QFN (5mm × 7mm)_2025-1
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LT8705AIUHF#TRPBF Details

  • Manufacturer Part Number:

    LT8705AIUHF#TRPBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    QFN-38

  • Pin Count:

    38

  • Manufacturer Package Code:

    05-08-1701

  • Country Of Origin:

    Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    9

  • Additional Feature:

    SEATED HT-CALCULATED

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    VOLTAGE-MODE

  • Control Technique:

    BURST MODE

  • Input Voltage-Max:

    80 V

  • Input Voltage-Min:

    2.8 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    R-PQCC-N38

  • JESD-609 Code:

    e3

  • Length:

    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:

    HVQCCN

  • Package Equivalence Code:

    LCC38,.2X.28,20

  • Package Shape:

    RECTANGULAR

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    0.8 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:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

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

    30

  • Width:

    5 mm

LT8705AIUHF#TRPBF Frequently Asked Questions (FAQs)

  • A good PCB layout is crucial for the LT8705AIUHF. Analog Devices recommends a 4-layer board with a solid ground plane, and to keep the input and output capacitors close to the IC. Additionally, the feedback resistors should be placed close to the FB pin, and the switching node should be kept away from sensitive nodes.
  • To ensure stability, it's essential to follow the recommended component values and PCB layout guidelines. Additionally, the output voltage should be set to a value that is within the recommended range, and the input voltage should be well-regulated. It's also important to consider the output capacitor's ESR and ESL values, as well as the inductor's DCR and core losses.
  • The LT8705AIUHF can operate in ambient temperatures ranging from -40°C to 125°C. However, the junction temperature should not exceed 150°C, and the device should be derated for temperatures above 85°C.
  • Yes, the LT8705AIUHF is qualified for automotive and high-reliability applications. It meets the AEC-Q100 standard and is designed to withstand the harsh conditions found in these environments. However, it's essential to follow the recommended design guidelines and testing procedures to ensure the device meets the required specifications.
  • To troubleshoot issues with the LT8705AIUHF, start by checking the input and output voltages, as well as the switching frequency. Verify that the component values and PCB layout meet the recommended specifications. Use an oscilloscope to check for ringing, overshoot, or other anomalies on the switching node. If the issue persists, consult the datasheet and application notes, or contact Analog Devices' technical support for further assistance.

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LT8705AIUHF#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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