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LT3957AEUHE#PBF - Analog Devices

Description: DC/DC Cntrlr Single-OUT Flyback/Step Up 1200kHz Automotive 28-Pin QFN EP Tube

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LT3957AEUHE#PBF - Analog Devices - PCB symbol
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PCB Footprints
LT3957AEUHE#PBF - Analog Devices PCB footprint - Other - Other - UHE Package Variation: UHE36(28)MA 36(28)-Lead Plastic QFN (5mm w 6mm)
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3D Models
LT3957AEUHE#PBF - Analog Devices - 3D model - Other - UHE Package Variation: UHE36(28)MA 36(28)-Lead Plastic QFN (5mm w 6mm)
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LT3957AEUHE#PBF Details

  • Manufacturer Part Number:

    LT3957AEUHE#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    5 X 6 MM, LEAD FREE, PLASTIC, QFN-38/28

  • Pin Count:

    28

  • Manufacturer Package Code:

    05-08-1836

  • Country Of Origin:

    Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Analog IC - Other Type:

    SWITCHING REGULATOR

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    40 V

  • Input Voltage-Min:

    3 V

  • Input Voltage-Nom:

    24 V

  • JESD-30 Code:

    R-PQCC-N38

  • JESD-609 Code:

    e3

  • Length:

    6 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    38

  • Operating Temperature-Max:

    125 °C

  • Output Current-Max:

    6.8 A

  • Output Voltage-Nom:

    24 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC28/36,.19X.23,20

  • 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:

    BOOST

  • Switching Frequency-Max:

    1200 kHz

  • Technology:

    BIPOLAR

  • Temperature Grade:

    OTHER

  • 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

LT3957AEUHE#PBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LT3957AEUHE#PBF should prioritize thermal dissipation. Place the device near a thermal pad or a heat sink, and ensure that the thermal pad is connected to a copper plane on the PCB. Use a 2-ounce copper pour on the top and bottom layers to dissipate heat efficiently.
  • To ensure reliable start-up and shutdown, make sure to follow the recommended power-up and power-down sequences outlined in the datasheet. Also, ensure that the input voltage rises monotonically and does not droop during start-up. A soft-start capacitor can be added to slow down the start-up time and reduce inrush current.
  • When selecting the output inductor, consider the inductor's saturation current, DC resistance, and core material. Choose an inductor with a saturation current rating higher than the peak current, and a DC resistance that minimizes power loss. Ferrite or iron powder cores are suitable for most applications.
  • To optimize the compensation network, start by selecting the recommended compensation components from the datasheet. Then, use the device's frequency response analyzer or a network analyzer to measure the loop gain and phase margin. Adjust the compensation components to achieve a phase margin of at least 45° and a gain margin of at least 10 dB.
  • The LT3957AEUHE#PBF has a maximum junction temperature of 150°C. Ensure that the device is mounted on a PCB with a thermal pad or heat sink to dissipate heat efficiently. Use thermal interface material (TIM) to fill any air gaps between the device and the heat sink. Calculate the thermal resistance of the system to ensure that the junction temperature remains within the specified limit.

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LT3957AEUHE#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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