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L4974A - STMicroelectronics

Description: L4974A, Switching Regulator, Buck Controller, 3.5A, Adjustable, 5.1 → 40 V, 200 kHz, 20-Pin Power PDIP

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L4974A - STMicroelectronics PCB footprint - Dual-In-Line Packages - Dual-In-Line Packages - DIP-20
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L4974A - STMicroelectronics  - 3D model - Dual-In-Line Packages - DIP-20
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L4974A Details

  • Manufacturer Part Number:

    L4974A

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    DIP

  • Package Description:

    POWER, PLASTIC, DIP-20

  • Pin Count:

    20

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    0

  • Analog IC - Other Type:

    SWITCHING REGULATOR

  • Control Mode:

    VOLTAGE-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    50 V

  • Input Voltage-Min:

    15 V

  • Input Voltage-Nom:

    35 V

  • JESD-30 Code:

    R-PDIP-T20

  • JESD-609 Code:

    e3

  • Number of Functions:

    1

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    150 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    5.5 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    DIP

  • Package Equivalence Code:

    DIP20,.3

  • Package Shape:

    RECTANGULAR

  • Package Style:

    IN-LINE

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    5.1 mm

  • Surface Mount:

    NO

  • Switcher Configuration:

    BUCK

  • Switching Frequency-Max:

    200 kHz

  • Technology:

    BCDMOS

  • Terminal Finish:

    TIN

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    2.54 mm

  • Terminal Position:

    DUAL

  • Width:

    7.62 mm

L4974A Frequently Asked Questions (FAQs)

  • The L4974A can handle input voltages up to 40V, but it's recommended to keep it below 35V for reliable operation.
  • Choose an output capacitor with a low ESR (Equivalent Series Resistance) and a capacitance value between 10uF to 100uF. A 22uF or 47uF capacitor is a good starting point.
  • The L4974A can operate with input voltages as low as 7V, but the output voltage regulation may not be guaranteed below 8V.
  • The L4974A is rated for operation up to 150°C, but it's recommended to derate the output current and input voltage to ensure reliable operation above 125°C.
  • The output voltage of the L4974A is determined by the resistor divider network between the output pin and the ground pin. Use the formula: Vout = 2.5V x (1 + R2/R1) to calculate the output voltage.

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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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