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L4940D2T12-TR - STMicroelectronics

Description: Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A, 12 V, 3-Pin D2PAK, 61dB (120Hz), 0.9V @ 1.5A, (Max) 17V, -40°C to 150°C

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L4940D2T12-TR - STMicroelectronics - PCB symbol
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PCB Footprints
L4940D2T12-TR - STMicroelectronics PCB footprint - Other - Other - D2PAK_2026-1.11
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3D Models
L4940D2T12-TR - STMicroelectronics - 3D model - Other - D2PAK_2026-1.11
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L4940D2T12-TR Details

  • Manufacturer Part Number:

    L4940D2T12-TR

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    D2PAK

  • Package Description:

    ROHS COMPLIANT, D2PAK-3

  • Pin Count:

    3

  • Country Of Origin:

    Mainland China

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    8 Weeks

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    6.2

  • Adjustability:

    FIXED

  • Dropout Voltage1-Max:

    0.9 V

  • Dropout Voltage1-Nom:

    0.5 V

  • Input Voltage Absolute-Max:

    30 V

  • Input Voltage-Max:

    17 V

  • Input Voltage-Min:

    13 V

  • JESD-30 Code:

    R-PSSO-G2

  • JESD-609 Code:

    e3

  • Length:

    10.2 mm

  • Line Regulation-Max:

    0.007%

  • Load Regulation-Max:

    0.035%

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    2

  • Operating Temperature TJ-Max:

    150 °C

  • Operating Temperature TJ-Min:

    -40 °C

  • Output Current1-Max:

    1.5 A

  • Output Voltage1-Max:

    12.5 V

  • Output Voltage1-Min:

    11.5 V

  • Output Voltage1-Nom:

    12 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    TO-263

  • Package Equivalence Code:

    SMSIP3H,.55TB

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Packing Method:

    TR

  • Peak Reflow Temperature (Cel):

    245

  • Qualification Status:

    Not Qualified

  • Regulator Type:

    FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR

  • Seated Height-Max:

    4.83 mm

  • Surface Mount:

    YES

  • Technology:

    BIPOLAR

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    SINGLE

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

    30

  • Voltage Tolerance-Max:

    4.17%

  • Width:

    9.15 mm

L4940D2T12-TR Frequently Asked Questions (FAQs)

  • A good PCB layout for optimal thermal performance would involve placing the L4940D2T12-TR near a thermal pad or a heat sink, ensuring good airflow, and minimizing thermal resistance. A 2-layer or 4-layer PCB with a solid ground plane can help reduce thermal impedance.
  • To ensure reliable operation in high-temperature environments, ensure proper heat sinking, use a thermally conductive interface material, and consider derating the device's power handling capabilities. Also, follow the recommended operating conditions and thermal management guidelines in the datasheet.
  • Using a different input capacitor value than recommended may affect the device's stability, output voltage regulation, and transient response. It's essential to follow the recommended input capacitor value and type to ensure optimal performance and stability.
  • To troubleshoot issues with the L4940D2T12-TR, start by verifying the input voltage, output voltage, and current consumption. Check the PCB layout, component values, and soldering quality. Use an oscilloscope to analyze the output voltage and current waveforms. Consult the datasheet and application notes for guidance on troubleshooting and debugging.
  • To minimize EMI and EMC issues, follow proper PCB layout and design guidelines, use shielding and filtering components, and ensure proper grounding and decoupling. Consult the datasheet and relevant application notes for specific guidance on EMI and EMC considerations.

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L4940D2T12-TR Overview

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About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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