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LMR33640DDDAR - Texas Instruments

Description: Switching Voltage Regulators SIMPLE SWITCHER® 3.8-V to 36-V, 4-A step-down converter in SOIC-8 package 8-SO PowerPAD -40 to 125

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LMR33640DDDAR - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - DDA0008J
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LMR33640DDDAR - Texas Instruments  - 3D model - Small Outline Packages - DDA0008J
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LMR33640DDDAR Details

  • Manufacturer Part Number:

    LMR33640DDDAR

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Date Of Intro:

    2019-11-14

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Additional Feature:

    ALSO OPERATES IN PFM CONTROL TECHNIQUE; OUTPUT IN ADJUSTABLE MODE IS 1V TO 24V

  • Analog IC - Other Type:

    SWITCHING REGULATOR

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    36 V

  • Input Voltage-Min:

    3.8 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e4

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    2

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    4 A

  • Output Voltage-Max:

    24 V

  • Output Voltage-Min:

    1 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HLSOP

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    1.7 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK

  • Switching Frequency-Max:

    1000 kHz

  • Temperature Grade:

    AUTOMOTIVE

  • Terminal Finish:

    Nickel/Palladium/Gold/Silver (Ni/Pd/Au/Ag)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    3.9 mm

LMR33640DDDAR Frequently Asked Questions (FAQs)

  • Texas Instruments recommends a 2-layer or 4-layer PCB with a solid ground plane and thermal vias to the bottom layer to improve thermal performance. A minimum of 2 oz copper thickness is recommended.
  • To ensure stability with a high-gain configuration, it's recommended to add a capacitor (e.g., 10nF to 100nF) in parallel with the feedback resistor to reduce the gain-bandwidth product and improve stability.
  • The LMR33640 can drive a maximum capacitive load of 10nF. Exceeding this limit may cause instability or oscillations.
  • To protect the device from overvoltage conditions, it's recommended to add a voltage clamp or a transient voltage suppressor (TVS) diode in parallel with the input pins to limit the voltage to the absolute maximum rating.
  • A simple RC filter with a 1kΩ resistor and a 10nF capacitor is recommended to reduce high-frequency noise and improve the power supply rejection ratio (PSRR).

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LMR33640DDDAR Overview

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About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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