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LT8640HUDC#PBF - Analog Devices

Description: Switching Voltage Regulators 42V, 6A Synchronous Step-Down Silent Switcher with 2.5uA Quiescent Current

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LT8640HUDC#PBF - Analog Devices - PCB symbol
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PCB Footprints
LT8640HUDC#PBF - Analog Devices PCB footprint - Other - Other - UDC Package Variation: UDC20(18) 20(18)-Lead Plastic QFN (3mm × 4mm)
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LT8640HUDC#PBF - Analog Devices - 3D model - Other - UDC Package Variation: UDC20(18) 20(18)-Lead Plastic QFN (3mm × 4mm)
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LT8640HUDC#PBF Details

  • Manufacturer Part Number:

    LT8640HUDC#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    QFN-20/18

  • Pin Count:

    18

  • Manufacturer Package Code:

    05-08-1956

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    8.5

  • Analog IC - Other Type:

    SWITCHING REGULATOR

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    SILENT SWITCHER

  • Input Voltage-Max:

    42 V

  • Input Voltage-Min:

    3.4 V

  • Input Voltage-Nom:

    6 V

  • JESD-30 Code:

    R-PQCC-N18

  • JESD-609 Code:

    e3

  • Length:

    4 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    18

  • Operating Temperature-Max:

    150 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    5 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC18/20,.12X.16,20

  • Package Shape:

    RECTANGULAR

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    0.8 mm

  • Supply Current-Max (Isup):

    0.35 mA

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK

  • Switching Frequency-Max:

    3000 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:

    3 mm

LT8640HUDC#PBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LT8640HUDC involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the input and output traces. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
  • To ensure stability, it's essential to follow the recommended component values and PCB layout guidelines. Additionally, consider using a feedforward capacitor (CFF) to improve the power supply rejection ratio (PSRR) and reduce the output voltage ripple.
  • The maximum output current capability of the LT8640HUDC is 2A. However, the actual output current capability may be limited by the input voltage, output voltage, and thermal considerations. Be sure to check the datasheet for specific details on output current capability under various operating conditions.
  • To optimize efficiency, select the optimal input and output capacitors, and adjust the switching frequency to minimize losses. Additionally, consider using a low-ESR output capacitor and a high-PSRR input capacitor to reduce energy losses.
  • The LT8640HUDC has a maximum junction temperature (TJ) of 125°C. Ensure reliable operation by providing adequate heat sinking, using a thermally conductive PCB material, and keeping the device away from heat sources. Monitor the device temperature and adjust the operating conditions accordingly.

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LT8640HUDC#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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