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LM3940IT-3.3 - Texas Instruments

Description: IC, LDO VOLT REG, 3.3V, 1A

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PCB Footprints
LM3940IT-3.3 - Texas Instruments PCB footprint - Other - Other - TO254P470X1016X2222-3P
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3D Models
LM3940IT-3.3 - Texas Instruments  - 3D model - Other - TO254P470X1016X2222-3P
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LM3940IT-3.3 Details

  • Manufacturer Part Number:

    LM3940IT-3.3

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SFM

  • Package Description:

    TO-220, 3 PIN

  • Pin Count:

    3

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Date Of Intro:

    1995-01-01

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Adjustability:

    FIXED

  • Dropout Voltage1-Max:

    1 V

  • Dropout Voltage1-Nom:

    0.31 V

  • Input Voltage Absolute-Max:

    7.5 V

  • Input Voltage-Max:

    5.5 V

  • Input Voltage-Min:

    4.5 V

  • JESD-30 Code:

    R-PSFM-T3

  • JESD-609 Code:

    e0

  • Length:

    14.986 mm

  • Line Regulation-Max:

    0.04%

  • Load Regulation-Max:

    0.08%

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    3

  • Operating Temperature TJ-Max:

    125 °C

  • Operating Temperature TJ-Min:

    -40 °C

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current1-Max:

    1 A

  • Output Voltage1-Max:

    3.47 V

  • Output Voltage1-Min:

    3.13 V

  • Output Voltage1-Nom:

    3.3 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    TO-220

  • Package Equivalence Code:

    SIP3,.1TB

  • Package Shape:

    RECTANGULAR

  • Package Style:

    FLANGE MOUNT

  • Packing Method:

    TUBE

  • Peak Reflow Temperature (Cel):

    NOT APPLICABLE

  • Qualification Status:

    Not Qualified

  • Regulator Type:

    FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR

  • Seated Height-Max:

    4.7 mm

  • Surface Mount:

    NO

  • Technology:

    BIPOLAR

  • Terminal Finish:

    Tin/Lead (Sn/Pb)

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    SINGLE

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

    NOT APPLICABLE

  • Voltage Tolerance-Max:

    5.2%

  • Width:

    10.16 mm

LM3940IT-3.3 Frequently Asked Questions (FAQs)

  • The maximum input voltage is 15V, but it's recommended to keep it below 12V for optimal performance and to prevent overheating.
  • To ensure a stable output voltage, make sure to use a suitable output capacitor with a low ESR (Equivalent Series Resistance) and a minimum capacitance of 10uF. Also, keep the input voltage within the recommended range and ensure good thermal dissipation.
  • The minimum input voltage required is 4.5V, but it's recommended to keep it above 5V for optimal performance and to ensure the output voltage remains stable.
  • The LM3940IT-3.3 is rated for operation up to 125°C, but it's recommended to keep the junction temperature below 115°C to ensure reliability and prevent overheating. Use a suitable heat sink and ensure good thermal dissipation to maintain a safe operating temperature.
  • Power dissipation (PD) can be calculated using the formula: PD = (VIN - VOUT) x IOUT, where VIN is the input voltage, VOUT is the output voltage, and IOUT is the output current. Make sure to keep the power dissipation within the recommended limits to prevent overheating.

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LM3940IT-3.3 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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Part Image LM3940IT-3.3 National Semiconductor Corporation

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