STMicroelectronics
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L78L05ACZ
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L78L05ACZ

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: Low-dropout, 5V output voltage
  • Package: TO-92
  • Essence: Linear voltage regulator
  • Packaging/Quantity: Bulk packaging, typically sold in reels of 1000 units

Specifications

  • Input Voltage Range: 7V to 35V
  • Output Voltage: 5V
  • Output Current: Up to 100mA
  • Dropout Voltage: 2V (maximum)
  • Quiescent Current: 4.5mA (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L05ACZ 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 5V output.

Functional Features

  • Voltage Regulation: The L78L05ACZ regulates the input voltage to a stable 5V output.
  • Low Dropout: It has a low dropout voltage, allowing it to operate with a small voltage difference between the input and output.
  • Thermal Protection: The IC includes thermal shutdown protection to prevent damage from excessive heat.
  • Short-Circuit Protection: It incorporates short-circuit current limiting to protect against overcurrent conditions.

Advantages and Disadvantages

Advantages: - Simple to use and integrate into electronic circuits. - Provides a stable and regulated 5V output. - Low dropout voltage enables efficient power conversion. - Offers thermal and short-circuit protection.

Disadvantages: - Limited output current capability (up to 100mA). - Requires external capacitors for stability.

Working Principles

The L78L05ACZ is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable 5V output. The dropout voltage is minimized by using a low-resistance pass element.

Detailed Application Field Plans

The L78L05ACZ is commonly used in various electronic applications, including:

  1. Power Supply Circuits: Provides regulated 5V power for microcontrollers, sensors, and other digital components.
  2. Battery-Powered Devices: Used to regulate battery voltage to a stable 5V for powering logic circuits.
  3. Automotive Electronics: Provides regulated power for automotive control systems and accessories.
  4. Industrial Control Systems: Used in PLCs (Programmable Logic Controllers) and other industrial automation equipment.

Detailed and Complete Alternative Models

  • LM7805: Similar linear voltage regulator with a TO-220 package.
  • AMS1117-5.0: Low-dropout voltage regulator with a SOT-223 package.
  • NCP1117-5.0: Adjustable linear voltage regulator with a TO-220 package.

(Note: This list is not exhaustive and there are several other alternative models available.)

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van L78L05ACZ in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of L78L05ACZ in technical solutions:

  1. Q: What is L78L05ACZ? A: L78L05ACZ is a voltage regulator IC that provides a fixed 5V output voltage.

  2. Q: What is the maximum input voltage for L78L05ACZ? A: The maximum input voltage for L78L05ACZ is typically around 35V.

  3. Q: What is the maximum output current of L78L05ACZ? A: The maximum output current of L78L05ACZ is 100mA.

  4. Q: Can L78L05ACZ be used to regulate voltages other than 5V? A: No, L78L05ACZ is specifically designed to provide a fixed 5V output.

  5. Q: Is L78L05ACZ suitable for low-power applications? A: Yes, L78L05ACZ is commonly used in low-power circuits and applications.

  6. Q: Does L78L05ACZ require any external components for operation? A: Yes, L78L05ACZ requires at least two external capacitors for stability and filtering.

  7. Q: Can L78L05ACZ handle reverse polarity protection? A: No, L78L05ACZ does not have built-in reverse polarity protection. External measures should be taken to protect against reverse polarity.

  8. Q: Can L78L05ACZ handle high temperatures? A: L78L05ACZ has a maximum operating temperature of 125°C, making it suitable for most applications.

  9. Q: Can L78L05ACZ be used in battery-powered applications? A: Yes, L78L05ACZ can be used in battery-powered applications as long as the input voltage is within its specified range.

  10. Q: Is L78L05ACZ available in different package types? A: Yes, L78L05ACZ is available in various package types, including TO-92, TO-220, and SOT-89.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications for L78L05ACZ.