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LTC3857IUH#TRPBF - Analog Devices

Description: Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

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LTC3857IUH#TRPBF - Analog Devices - PCB symbol
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PCB Footprints
LTC3857IUH#TRPBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - UH Package 32-Lead Plastic QFN (5mm × 5mm) (Reference LTC DWG # 05-08-1693 Rev D)
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3D Models
LTC3857IUH#TRPBF - Analog Devices - 3D model - Quad Flat No-Lead - UH Package 32-Lead Plastic QFN (5mm × 5mm) (Reference LTC DWG # 05-08-1693 Rev D)
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LTC3857IUH#TRPBF Details

  • Manufacturer Part Number:

    LTC3857IUH#TRPBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32

  • Pin Count:

    32

  • Manufacturer Package Code:

    05-08-1693

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Additional Feature:

    ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8V TO 24V

  • Analog IC - Other Type:

    DUAL SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    38 V

  • Input Voltage-Min:

    4 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    S-PQCC-N32

  • JESD-609 Code:

    e3

  • Length:

    5 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    32

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Voltage-Max:

    24 V

  • Output Voltage-Min:

    0.8 V

  • Output Voltage-Nom:

    5.1 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Shape:

    SQUARE

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    0.8 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    PHASE-SHIFT

  • Switching Frequency-Max:

    900 kHz

  • Technology:

    CMOS

  • Temperature Grade:

    AUTOMOTIVE

  • 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:

    5 mm

LTC3857IUH#TRPBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LTC3857IUH involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the traces between the IC and the capacitors. Additionally, it's recommended to use a separate power plane for the input voltage and to keep the noise-sensitive analog signals away from the switching node.
  • When choosing an inductor for the LTC3857IUH, consider the inductor's saturation current, DC resistance, and core material. The inductor should be able to handle the peak current of the converter, and its DC resistance should be low to minimize power loss. A ferrite or iron powder core inductor with a high saturation current rating is usually a good choice.
  • The LTC3857IUH is rated for operation from -40°C to 125°C, but the maximum ambient temperature range depends on the specific application and the device's power dissipation. It's recommended to derate the device's power dissipation according to the ambient temperature to ensure reliable operation.
  • Yes, the LTC3857IUH is available in a variety of grades, including the industrial grade (I) and the automotive grade (MP). The automotive grade is qualified to the AEC-Q100 standard and is suitable for use in high-reliability applications. However, it's recommended to consult with Analog Devices' application engineers to ensure that the device meets the specific requirements of the application.
  • To troubleshoot issues with the LTC3857IUH, start by checking the PCB layout and ensuring that it follows the recommended layout guidelines. Then, verify that the input and output capacitors are properly selected and that the inductor is suitable for the application. Use an oscilloscope to measure the voltage and current waveforms at the input and output of the converter, and check for signs of oscillation or instability. Consult the datasheet and application notes for troubleshooting guidelines and seek support from Analog Devices' application engineers if needed.

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LTC3857IUH#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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