Exar Corporation
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SPX3940AT-L-1-8/TR
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SPX3940AT-L-1-8/TR

Product Overview

Category

The SPX3940AT-L-1-8/TR belongs to the category of voltage regulators.

Use

It is used to regulate voltage in electronic circuits, ensuring a stable output voltage regardless of input fluctuations.

Characteristics

  • Input Voltage Range: 4.5V to 30V
  • Output Voltage: 1.8V
  • Maximum Output Current: 1A
  • Low Dropout Voltage: 0.5V at 1A
  • Low Quiescent Current: 10mA
  • Thermal Shutdown Protection
  • Short Circuit Protection

Package

The SPX3940AT-L-1-8/TR is available in a TO-220 package.

Essence

This voltage regulator provides a reliable and stable power supply for various electronic applications.

Packaging/Quantity

It is typically packaged in reels with a quantity of 2500 units per reel.

Specifications

  • Input Voltage Range: 4.5V to 30V
  • Output Voltage: 1.8V
  • Output Current: 1A
  • Dropout Voltage: 0.5V at 1A
  • Quiescent Current: 10mA
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The SPX3940AT-L-1-8/TR has three pins: 1. Input (VIN): Connects to the input voltage source. 2. Ground (GND): Connected to the ground reference. 3. Output (VOUT): Provides the regulated output voltage.

Functional Features

  • Voltage Regulation: Maintains a constant output voltage despite variations in the input voltage.
  • Thermal Shutdown Protection: Safeguards the device from overheating.
  • Short Circuit Protection: Prevents damage due to short circuits.

Advantages and Disadvantages

Advantages

  • Reliable voltage regulation
  • Low dropout voltage
  • Thermal and short circuit protection
  • Wide input voltage range

Disadvantages

  • Relatively higher quiescent current compared to some alternatives
  • Limited output current compared to higher-rated regulators

Working Principles

The SPX3940AT-L-1-8/TR utilizes a feedback control mechanism to maintain the output voltage at a constant level. When the input voltage fluctuates, the internal circuitry adjusts to ensure a steady output voltage.

Detailed Application Field Plans

The SPX3940AT-L-1-8/TR is commonly used in: - Battery-powered devices - Embedded systems - Automotive electronics - Industrial control systems

Detailed and Complete Alternative Models

Some alternative models to the SPX3940AT-L-1-8/TR include: - LM317 - LM1117 - LT1086

In summary, the SPX3940AT-L-1-8/TR is a reliable voltage regulator with a wide input voltage range, making it suitable for various electronic applications. Its thermal and short circuit protection features enhance its reliability, although it may have limitations in certain high-current applications.

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Énumérez 10 questions et réponses courantes liées à l'application de SPX3940AT-L-1-8/TR dans les solutions techniques

  1. What is the input voltage range for SPX3940AT-L-1-8/TR?
    - The input voltage range for SPX3940AT-L-1-8/TR is 4.5V to 30V.

  2. What is the output voltage of SPX3940AT-L-1-8/TR?
    - The output voltage of SPX3940AT-L-1-8/TR is fixed at 1.8V.

  3. What is the maximum output current of SPX3940AT-L-1-8/TR?
    - The maximum output current of SPX3940AT-L-1-8/TR is 1A.

  4. Is SPX3940AT-L-1-8/TR suitable for battery-powered applications?
    - Yes, SPX3940AT-L-1-8/TR is suitable for battery-powered applications due to its low dropout voltage.

  5. Can SPX3940AT-L-1-8/TR be used in automotive electronics?
    - Yes, SPX3940AT-L-1-8/TR is designed to meet the requirements for automotive electronics applications.

  6. Does SPX3940AT-L-1-8/TR require an external heat sink for thermal management?
    - No, SPX3940AT-L-1-8/TR does not require an external heat sink under normal operating conditions.

  7. What is the typical quiescent current of SPX3940AT-L-1-8/TR?
    - The typical quiescent current of SPX3940AT-L-1-8/TR is 75µA.

  8. Can SPX3940AT-L-1-8/TR tolerate input voltage transients?
    - Yes, SPX3940AT-L-1-8/TR can tolerate input voltage transients up to 40V.

  9. Is SPX3940AT-L-1-8/TR available in a surface-mount package?
    - Yes, SPX3940AT-L-1-8/TR is available in a surface-mount TO-252 package.

  10. What are the typical applications for SPX3940AT-L-1-8/TR?
    - Typical applications for SPX3940AT-L-1-8/TR include power supplies, industrial equipment, and consumer electronics.