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L4974 (L4974A) IC – 3.5A Switching Regulator IC

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25 In stock


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850.00 (excluding 18% GST)

25 In stock

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Description

The L4974 is a step-down (buck) switching regulator IC that integrates all necessary functions for a complete DC-DC converter. It features an internal reference, error amplifier, oscillator, and protection circuits, making it a compact solution for power supply design. The L4974A version offers enhanced performance and features compared to the basic L4974 model, providing more robust and reliable operation.

Features

  • 3.5A Output Current: Capable of delivering up to 3.5A of continuous output current, suitable for a wide range of applications.
  • Wide Input Voltage Range: Operates with an input voltage range from 8.4V to 50V, allowing it to be used in various power supply designs.
  • Adjustable Output Voltage: The output voltage can be set between 5.1V and 40V using external resistors, providing flexibility for different applications.
  • High Efficiency: Designed for efficient power conversion, typically achieving efficiencies greater than 85%, reducing heat dissipation and improving energy efficiency.
  • Fixed Frequency Operation: Internal oscillator operates at a fixed frequency of 100 kHz, simplifying the design process and ensuring stable operation.
  • Current Limiting: Built-in current limiting feature protects the IC and connected load from excessive current conditions.
  • Thermal Shutdown: Includes thermal protection to prevent the IC from overheating during operation, enhancing reliability.
  • Soft Start: Gradual increase in output voltage during startup to prevent excessive inrush current, improving system stability.
  • Overvoltage Protection: Integrated overvoltage protection safeguards the IC and the load in case of an output voltage anomaly.
  • Low Output Ripple: The IC is designed to minimize output voltage ripple, ensuring stable and clean power delivery to sensitive electronics.
  • Compact Package: Available in a TO-220 package, which provides efficient heat dissipation and is easy to handle in various power supply designs.

Specifications

  • Input Voltage Range: 8.4V to 50V
  • Output Voltage Range: Adjustable from 5.1V to 40V
  • Output Current: Up to 3.5A
  • Switching Frequency: 100 kHz
  • Efficiency: Typically >85%
  • Quiescent Current: Typically 8 mA
  • Thermal Shutdown: Yes
  • Current Limiting: Yes
  • Operating Temperature Range: -40°C to +150°C (junction temperature)
  • Package: TO-220

Applications

  • Microprocessor Power Supplies: Provides stable and efficient power for microprocessors and other digital circuits.
  • Industrial Control Systems: Ideal for power regulation in industrial electronics and control systems, requiring medium power output.
  • Telecommunications Equipment: Used in power supplies for telecom infrastructure, providing reliable and efficient power conversion.
  • Automotive Electronics: Suitable for automotive power applications, where it can regulate power for various subsystems.
  • Battery Chargers: Utilized in designing efficient battery chargers with medium current output.
  • General-Purpose DC-DC Converters: Ideal for creating adjustable DC power supplies for various electronic applications.

Note

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

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