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L78L09ACD13TR
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L78L09ACD13TR

Product Overview

  • Category: Voltage Regulator
  • Use: Provides a regulated output voltage of 9V
  • Characteristics: Low dropout voltage, high current capability
  • Package: DPAK (TO-252) package
  • Essence: Linear voltage regulator
  • Packaging/Quantity: Tape and reel, 2,500 units per reel

Specifications

  • Input Voltage Range: 10.5V to 35V
  • Output Voltage: 9V ±4%
  • Dropout Voltage: 1.7V (typical)
  • Output Current: Up to 100mA
  • Quiescent Current: 4.5mA (typical)
  • Line Regulation: 0.04% (typical)
  • Load Regulation: 0.3% (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L09ACD13TR 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

  • Low dropout voltage: The L78L09ACD13TR has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
  • High current capability: With an output current capability of up to 100mA, this voltage regulator can handle a wide range of applications.
  • Thermal shutdown protection: The device includes thermal shutdown protection to prevent damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Compact DPAK package allows for easy integration into various electronic circuits. - Wide input voltage range enables compatibility with different power sources. - Low dropout voltage ensures efficient regulation even with small voltage differentials.

Disadvantages: - Limited output current capability may not be suitable for high-power applications. - Higher quiescent current compared to some other voltage regulators may impact power efficiency in low-power applications.

Working Principles

The L78L09ACD13TR is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage and adjusting the pass transistor accordingly. This feedback mechanism ensures a stable output voltage despite variations in the input voltage or load conditions.

Detailed Application Field Plans

The L78L09ACD13TR can be used in various applications, including:

  1. Power supply circuits: Provides a regulated 9V output voltage for powering microcontrollers, sensors, and other electronic components.
  2. Battery-powered devices: Regulates the battery voltage to a stable 9V level, ensuring consistent performance of the connected circuitry.
  3. Automotive electronics: Suitable for automotive applications requiring a regulated 9V supply, such as dashboard displays, lighting systems, and audio equipment.

Detailed and Complete Alternative Models

  1. LM7809: A popular alternative from Texas Instruments with similar specifications and pin configuration.
  2. MC7809: Another alternative from ON Semiconductor offering comparable performance and compatibility.
  3. UA7809: An alternative from Fairchild Semiconductor known for its reliability and wide availability.

These alternatives provide similar functionality and can be used as drop-in replacements for the L78L09ACD13TR in various applications.

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Énumérez 10 questions et réponses courantes liées à l'application de L78L09ACD13TR dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of L78L09ACD13TR in technical solutions:

  1. Q: What is L78L09ACD13TR? A: L78L09ACD13TR is a voltage regulator IC that provides a fixed output voltage of +9V.

  2. Q: What is the input voltage range for L78L09ACD13TR? A: The input voltage range for L78L09ACD13TR is typically between +11V and +35V.

  3. Q: What is the maximum output current of L78L09ACD13TR? A: The maximum output current of L78L09ACD13TR is 100mA.

  4. Q: Can L78L09ACD13TR handle higher input voltages than +35V? A: No, exceeding the maximum input voltage can damage the IC. It is recommended to stay within the specified range.

  5. Q: Is L78L09ACD13TR suitable for both AC and DC input voltages? A: Yes, L78L09ACD13TR can handle both AC and DC input voltages.

  6. Q: Does L78L09ACD13TR require any external components for operation? A: Yes, L78L09ACD13TR requires at least two external capacitors (input and output) for stability and filtering purposes.

  7. Q: Can L78L09ACD13TR be used in automotive applications? A: Yes, L78L09ACD13TR is suitable for automotive applications as it meets the required standards and specifications.

  8. Q: What is the thermal resistance of L78L09ACD13TR? A: The thermal resistance of L78L09ACD13TR is typically 50°C/W, which determines its ability to dissipate heat.

  9. Q: Can L78L09ACD13TR be used in high-temperature environments? A: Yes, L78L09ACD13TR can operate in a temperature range of -40°C to +125°C, making it suitable for various applications.

  10. Q: Is L78L09ACD13TR available in different package options? A: Yes, L78L09ACD13TR is available in different package options such as TO-92, SO-8, and DPAK, providing flexibility for different designs.

Please note that the answers provided here are general and may vary depending on the specific datasheet and manufacturer's specifications for L78L09ACD13TR.