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LT3942JUFD#TRPBF - Analog Devices

Description: 36V, 2A Synchronous?Buck-Boost Converter and?LED Driver

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LT3942JUFD#TRPBF - Analog Devices - PCB symbol
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LT3942JUFD#TRPBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - UFD (28-Lead QFN)_2025
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LT3942JUFD#TRPBF - Analog Devices - 3D model - Quad Flat No-Lead - UFD (28-Lead QFN)_2025
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LT3942JUFD#TRPBF Details

  • Manufacturer Part Number:

    LT3942JUFD#TRPBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    QFN-28

  • Pin Count:

    28

  • Manufacturer Package Code:

    05-08-1712

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Date Of Intro:

    2019-10-10

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    9

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    36 V

  • Input Voltage-Min:

    3 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    R-PQCC-N28

  • JESD-609 Code:

    e3

  • Length:

    5 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    28

  • Operating Temperature-Max:

    150 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    2 A

  • Output Voltage-Max:

    36 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC28,.16X.2,20

  • 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:

    2100 kHz

  • Technology:

    BIPOLAR

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

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

    30

  • Width:

    4 mm

LT3942JUFD#TRPBF Frequently Asked Questions (FAQs)

  • The recommended PCB layout for optimal thermal performance involves placing the device on a 2-layer or 4-layer board with a solid ground plane on the bottom layer, and using thermal vias to connect the exposed pad to the ground plane. Additionally, keeping the thermal path short and using a thermal pad on the top layer can help to reduce thermal resistance.
  • To ensure reliable start-up and operation with a high-impedance input source, it is recommended to add a 10nF to 100nF capacitor between the VIN pin and the input source, and to use a low-ESR output capacitor. Additionally, the input source should be able to provide a minimum of 10mA of current to ensure reliable start-up.
  • The maximum allowed voltage on the EN pin is 6V. Exceeding this voltage can cause damage to the device. It is recommended to use a voltage divider or a clamp circuit to limit the voltage on the EN pin to 5.5V or less.
  • To optimize the output voltage accuracy, it is recommended to use a high-accuracy voltage reference, such as the LT6650, and to minimize the resistance of the output voltage sense lines. Additionally, using a low-ESR output capacitor and keeping the output voltage sense lines away from noise sources can help to improve output voltage accuracy.
  • The recommended input capacitor type is a low-ESR ceramic capacitor, such as an X5R or X7R dielectric capacitor. The recommended value is 10uF to 22uF, depending on the input voltage and the desired level of input ripple rejection.

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LT3942JUFD#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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