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LM3940 IC – 1A – Low Dropout Regulator IC for 5V to 3.3V Conversion

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25 In stock


Note: Any order placed will take 15 days for dispatch.

420.00 (excluding 18% GST)

25 In stock

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Description

The LM3940 is a three-terminal adjustable or fixed low dropout regulator that can handle up to 1A of continuous current. It is specifically designed to offer efficient regulation with minimal input-to-output voltage differential, making it ideal for converting 5V down to 3.3V. The regulator features internal protection circuits to safeguard against overcurrent and thermal overload conditions.

Features

  • Fixed Output Voltage: Provides a stable 3.3V output. (Note: Some variants may offer adjustable output voltage versions.)
  • Low Dropout Voltage: Low dropout voltage of typically 1.2V at 1A load, allowing for efficient voltage conversion even with a small input-to-output voltage differential.
  • Output Current: Capable of supplying up to 1A of continuous output current.
  • High Accuracy: Provides precise output voltage regulation with minimal deviation.
  • Thermal Overload Protection: Includes built-in thermal overload protection to prevent damage from excessive heat.
  • Short-Circuit Protection: Features short-circuit protection to safeguard against overload conditions.
  • Wide Input Voltage Range: Operates with input voltages up to around 15V, suitable for various power supply configurations.
  • Low Quiescent Current: Designed for low quiescent current consumption, improving overall efficiency.

Specifications

  • Output Voltage: Fixed at 3.3V (or adjustable in some variants)
  • Output Current: Up to 1A
  • Dropout Voltage: Typically 1.2V at 1A load
  • Line Regulation: Typically 0.02%/V
  • Load Regulation: Typically 0.1% for a 0 to 1A load
  • Temperature Range: -40°C to +125°C
  • Package Types: Available in TO-220, TO-252, and other suitable packages for different mounting and heat dissipation requirements.

Applications

  • Power Supply Conversion: Ideal for converting 5V to 3.3V in power supply circuits for various electronic devices.
  • Embedded Systems: Suitable for embedded systems requiring stable 3.3V power from a higher voltage supply.
  • Consumer Electronics: Used in consumer electronics where efficient and reliable voltage regulation is needed.
  • Communication Equipment: Employed in communication devices requiring precise voltage regulation for stable operation.
  • Battery-Powered Devices: Useful in battery-powered devices to maintain efficient voltage conversion and regulation.

Note

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

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