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LM2991T - Texas Instruments

Description: Output Voltage Adjustable from −3 V to −24 V, Typically −2 V to −25 V • Output Current in Excess of 1 A • Dropout Voltage Typically 0.6 V at 1-A Load • Low Quiescent Current • Internal Short Circuit Current Limit • Internal Thermal Shutdown With Hysteresis • TTL, CMOS Compatible ON/OFF Switch • Functional Complement to the LM2941 Series

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PCB Footprints
LM2991T - Texas Instruments PCB footprint - Transistor Outline, Vertical - Transistor Outline, Vertical - KC0005A
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LM2991T Details

  • Manufacturer Part Number:

    LM2991T

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SFM

  • Package Description:

    TO-220, 5 PIN

  • Pin Count:

    3

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Date Of Intro:

    1994-06-01

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Adjustability:

    ADJUSTABLE

  • Dropout Voltage1-Max:

    1 V

  • Dropout Voltage1-Nom:

    0.6 V

  • Input Voltage-Max:

    0.3 V

  • Input Voltage-Min:

    26 V

  • JESD-30 Code:

    R-PSFM-T5

  • JESD-609 Code:

    e0

  • Length:

    10.16 mm

  • Line Regulation-Max (%/V):

    0.04

  • Load Regulation-Max(%):

    0.4%

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    5

  • Operating Temperature TJ-Max:

    125 °C

  • Operating Temperature TJ-Min:

    -40 °C

  • Output Current1-Max:

    1 A

  • Output Voltage1-Max:

    24 V

  • Output Voltage1-Min:

    3 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SFM

  • Package Equivalence Code:

    SIP5,.1,67TB

  • Package Shape:

    RECTANGULAR

  • Package Style:

    FLANGE MOUNT

  • Packing Method:

    TUBE

  • Qualification Status:

    Not Qualified

  • Regulator Type:

    ADJUSTABLE NEGATIVE SINGLE OUTPUT LDO REGULATOR

  • Seated Height-Max:

    4.7 mm

  • Surface Mount:

    NO

  • Technology:

    BIPOLAR

  • Terminal Finish:

    TIN LEAD

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    1.7 mm

  • Terminal Position:

    SINGLE

  • Voltage Tolerance-Max:

    5%

  • Width:

    8.51 mm

LM2991T Frequently Asked Questions (FAQs)

  • The LM2991T can handle input voltages up to 40V, but it's recommended to keep it below 35V for reliable operation.
  • To ensure stability, make sure to use a minimum output capacitance of 10uF, and keep the output voltage ripple below 1% of the output voltage. Also, use a low-ESR capacitor and keep the layout clean and compact.
  • The LM2991T can deliver up to 3A of output current, but it's recommended to keep it below 2.5A for reliable operation and to prevent overheating.
  • The output voltage of the LM2991T can be adjusted by using a resistive divider network between the output and the ADJ pin. The output voltage is determined by the ratio of the resistors and the internal reference voltage.
  • The EN (Enable) pin is used to turn the regulator on or off. When the EN pin is high, the regulator is enabled, and when it's low, the regulator is disabled.

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LM2991T 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 LM2991TFLOWLB03 Texas Instruments

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For a full list of alternate parts for LM2991T, check out Findchips.com