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LTC3857IUH#PBF - Analog Devices

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

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LTC3857IUH#PBF - Analog Devices - PCB symbol
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PCB Footprints
LTC3857IUH#PBF - 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#PBF - 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#PBF Details

  • Manufacturer Part Number:

    LTC3857IUH#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    5 X 5 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, 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:

    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:

    85 °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:

    850 kHz

  • Technology:

    CMOS

  • Temperature Grade:

    INDUSTRIAL

  • 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#PBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LTC3857IUH involves keeping the high-current paths short and wide, using a solid ground plane, and placing the input and output capacitors close to the IC. A 4-layer board with a dedicated power plane is recommended. Refer to the datasheet's layout guidelines and application notes for more details.
  • Choose input capacitors with low ESR and high ripple current rating. Output capacitors should have low ESR, high capacitance, and be able to handle the output voltage and current. Consider using ceramic or polymer capacitors. Refer to the datasheet's capacitor selection guidelines and application notes for more details.
  • The maximum ambient temperature for the LTC3857IUH is 85°C. However, the junction temperature (TJ) should not exceed 125°C. Ensure proper thermal design and heat sinking to maintain a safe operating temperature.
  • Yes, the LTC3857IUH is qualified for automotive and high-reliability applications. It meets the AEC-Q100 standard and is available in a variety of grades, including the 'H' grade for high-reliability applications. Consult the datasheet and Analog Devices' website for more information on the device's qualifications and certifications.
  • To troubleshoot issues with the LTC3857IUH, start by verifying the PCB layout, component selection, and soldering quality. Check for proper input and output voltage levels, and ensure that the device is operated within its specified limits. Use oscilloscopes and other diagnostic tools to identify the root cause of the issue. Consult the datasheet's troubleshooting section and application notes for more guidance.

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LTC3857IUH#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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