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LM138K - STMicroelectronics

Description: IC REG LINEAR POS ADJ 5A TO3

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LM138K - STMicroelectronics - PCB symbol
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PCB Footprints
LM138K - STMicroelectronics PCB footprint - Other - Other - LM138K-3
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3D Models
LM138K - STMicroelectronics - 3D model - Other - LM138K-3
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LM138K Details

  • Manufacturer Part Number:

    LM138K

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    TO-204AA

  • Package Description:

    METAL CAN, TO-3, 2 PIN

  • Pin Count:

    2

  • Reach Compliance Code:

    Not Compliant

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    0

  • Adjustability:

    ADJUSTABLE

  • Dropout Voltage1-Nom:

    3 V

  • Input-Output Voltage Differential-Max:

    35 V

  • Input-Output Voltage Differential-Min:

    3 V

  • JESD-30 Code:

    O-MBFM-P2

  • JESD-609 Code:

    e3

  • Line Regulation-Max (%/V):

    0.01

  • Load Regulation-Max(%):

    0.3%

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    2

  • Operating Temperature TJ-Max:

    150 °C

  • Operating Temperature TJ-Min:

    -55 °C

  • Output Current1-Max:

    5 A

  • Output Voltage1-Max:

    32 V

  • Output Voltage1-Min:

    1.2 V

  • Package Body Material:

    METAL

  • Package Code:

    BFM

  • Package Equivalence Code:

    TO-204/-3

  • Package Shape:

    ROUND

  • Package Style:

    FLANGE MOUNT

  • Qualification Status:

    Not Qualified

  • Regulator Type:

    ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR

  • Surface Mount:

    NO

  • Technology:

    BIPOLAR

  • Terminal Finish:

    MATTE TIN

  • Terminal Form:

    PIN/PEG

  • Terminal Position:

    BOTTOM

LM138K Frequently Asked Questions (FAQs)

  • The LM138K can handle input voltages up to 35V, but it's recommended to keep it below 25V for optimal performance and to prevent overheating.
  • To ensure stability, make sure to use a minimum output capacitance of 10uF, and a maximum ESR (Equivalent Series Resistance) of 5 ohms. Also, keep the input and output capacitors close to the regulator to minimize parasitic inductance.
  • The LM138K requires a minimum input voltage of 2V above the output voltage to regulate properly. For example, if you're using the 5V version, the input voltage should be at least 7V.
  • The LM138K is rated for operation up to 125°C, but its performance may degrade at high temperatures. Make sure to derate the output current and input voltage according to the datasheet's thermal derating curves.
  • Use a TVS (Transient Voltage Suppressor) diode or a voltage clamp circuit at the input to protect the LM138K from voltage transients and spikes. This will help prevent damage to the regulator and ensure reliable operation.

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LM138K 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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