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L4978 IC – (SMD Package) – 2A Step Down Switching Regulator IC

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₹379.00 (excluding 18% GST)

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Description

The L4978 is a 2A Step-Down (Buck) Switching Regulator IC produced by STMicroelectronics. It is designed to provide high-efficiency, low-noise voltage regulation in a wide range of power applications. This IC is well-suited for powering devices that require a stable and efficient DC output voltage, and it operates using pulse-width modulation (PWM) to regulate the voltage.

Features

  • Step-Down Voltage Regulator (Buck Converter): Converts a higher DC voltage to a lower DC voltage efficiently.
  • Output Current: Capable of delivering up to 2A of continuous output current.
  • Wide Input Voltage Range: Works with input voltages from 8V to 40V, making it versatile for various systems with different input voltage requirements.
  • High Efficiency: Achieves efficiency levels up to 90% due to its switching regulator design, significantly reducing heat dissipation compared to linear regulators.
  • Adjustable Output Voltage: The output voltage can be adjusted from 5V to 40V using external resistors, providing flexibility to meet different voltage requirements.
  • Low Ripple and Noise: Provides low ripple and noise on the output, making it suitable for sensitive electronics that require clean power.
  • Overcurrent Protection: Built-in protection against overcurrent and thermal overload conditions, improving the reliability of the power supply.
  • Short Circuit Protection: Automatically shuts down or limits current in case of a short circuit on the output.
  • Thermal Shutdown: The IC features thermal protection, ensuring the regulator does not overheat during high-load conditions.
  • SMD Package: The IC is available in a Surface-Mount Device (SMD) package, making it easy to integrate into modern PCB designs with compact form factors.

Specifications

Electrical Characteristics
  • Input Voltage Range (Vin): 8V to 40V
  • Output Voltage (Vout): Adjustable from 5V to 40V (using external resistors for feedback).
  • Output Current (Iout): Up to 2A continuous.
  • Efficiency: Up to 90% depending on input/output voltage and load conditions.
  • Switching Frequency: Typically 100 kHz, but can be adjusted depending on external components.
  • Quiescent Current: Typically 5mA, ensuring minimal power consumption during operation.
  • Operating Temperature Range: -40°C to +125°C, making it suitable for use in industrial and automotive applications.
Protection Features
  • Overcurrent Protection: Limits current during fault conditions, preventing damage to the IC and load.
  • Thermal Shutdown: The IC automatically disables itself if the junction temperature exceeds safe limits, ensuring protection against overheating.
  • Short Circuit Protection: Protects the circuit in the event of a short circuit on the output.
  • Soft-Start Circuit: Reduces inrush current during startup to prevent power-up surges.

Note

* Product Images are shown for illustrative purposes only and may differ from actual product

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