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L4977A - STMicroelectronics

Description: STMicroelectronics, L4977A Step-Down Switching Regulator, 1-Channel 7A Adjustable 15-Pin, MULTIWATT V

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L4977A - STMicroelectronics PCB footprint - Transistor Outline, Vertical - Transistor Outline, Vertical - Multiwatt15V_2022
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L4977A - STMicroelectronics  - 3D model - Transistor Outline, Vertical - Multiwatt15V_2022
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L4977A Details

  • Manufacturer Part Number:

    L4977A

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    ZFM

  • Package Description:

    PLASTIC, POWER PACK-15

  • Pin Count:

    15

  • 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-PZFM-T15

  • JESD-609 Code:

    e3

  • Length:

    20.2 mm

  • Number of Functions:

    1

  • Number of Terminals:

    15

  • Operating Temperature-Max:

    150 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    11 A

  • Output Voltage-Max:

    40 V

  • Output Voltage-Min:

    5.1 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    ZIP

  • Package Equivalence Code:

    ZIP15,.2,.17TB

  • Package Shape:

    RECTANGULAR

  • Package Style:

    FLANGE MOUNT

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    17.75 mm

  • Surface Mount:

    NO

  • Switcher Configuration:

    BUCK

  • Switching Frequency-Max:

    500 kHz

  • Technology:

    BCDMOS

  • Terminal Finish:

    MATTE TIN

  • Terminal Form:

    THROUGH-HOLE

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    ZIG-ZAG

  • Width:

    5 mm

L4977A Frequently Asked Questions (FAQs)

  • The L4977A can handle input voltages up to 40V, but it's recommended to keep it below 30V for optimal performance and reliability.
  • To ensure stability, make sure to use a minimum output capacitance of 10uF, and a minimum ESR (Equivalent Series Resistance) of 0.1 ohms. Also, keep the input and output capacitors close to the IC and use a good quality PCB layout.
  • The L4977A can deliver up to 1.5A of output current, but it's recommended to keep it below 1.2A for optimal performance and reliability.
  • The output voltage of the L4977A can be adjusted by using a resistive divider network between the output pin and the adjust pin. The ratio of the resistors determines the output voltage, which can be calculated using the formula: Vout = 2.5V * (1 + R1/R2).
  • The 'EN' pin is an enable input that allows the user 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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L4977A 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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