MC78L15ACDR2G

Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Fixed output voltage of 15V - Low dropout voltage - Output current up to 100mA - Thermal overload protection - Short circuit current limiting

Package: SOIC-8

Essence: The MC78L15ACDR2G is a positive voltage regulator that provides a fixed output voltage of 15V. It is designed to regulate the input voltage and provide a stable output voltage for various electronic devices.

Packaging/Quantity: The MC78L15ACDR2G is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 17V to 30V
• Output Voltage: 15V ±5%
• Output Current: Up to 100mA
• Dropout Voltage: 1.7V (typical)
• Quiescent Current: 5mA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The MC78L15ACDR2G has 8 pins arranged as follows:

```

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| | --| Vout GND|-- --| Vin NC |-- --| Vin GND|-- --| Vin GND|-- --| Vin GND|-- --| Vin GND|-- |___________| ```

Pin Description: - Vout: Output Voltage - Vin: Input Voltage - GND: Ground - NC: No Connection

Functional Features

1. Voltage Regulation: The MC78L15ACDR2G regulates the input voltage to maintain a constant output voltage of 15V, even when the input voltage fluctuates.

2. Low Dropout Voltage: The regulator has a low dropout voltage of 1.7V, which means it can maintain a stable output voltage even when the input voltage is close to the desired output voltage.

3. Thermal Overload Protection: The IC incorporates thermal overload protection, which prevents damage due to excessive heat by shutting down the regulator temporarily.

4. Short Circuit Current Limiting: In case of a short circuit, the MC78L15ACDR2G limits the output current to protect both the regulator and the connected devices.

Advantages

• Compact size and lightweight
• Easy to use and integrate into electronic circuits
• Provides a stable output voltage for various applications
• Offers thermal overload protection and short circuit current limiting for added safety

Disadvantages

• Limited output current capacity (up to 100mA)
• Requires an input voltage within a specific range (17V to 30V)

Working Principles

The MC78L15ACDR2G operates based on the principle of linear voltage regulation. It uses a series pass transistor to regulate the output voltage. When the input voltage exceeds the desired output voltage, the regulator reduces the excess voltage across the pass transistor, maintaining a constant output voltage.

Detailed Application Field Plans

The MC78L15ACDR2G is commonly used in various electronic devices and applications, including:

1. Power Supplies: It is used as a voltage regulator in power supply circuits to provide a stable 15V output for microcontrollers, sensors, and other components.

2. Automotive Electronics: The regulator finds application in automotive electronics, such as car audio systems, GPS devices, and dashboard displays, where a regulated 15V supply is required.

3. Industrial Control Systems: It is utilized in industrial control systems to regulate voltages for analog and digital circuits, ensuring reliable operation of control modules and sensors.

4. Consumer Electronics: The MC78L15ACDR2G is used in various consumer electronic devices, including audio amplifiers, LED lighting systems, and battery chargers.

Detailed and Complete Alternative Models

1. LM7815: This is a popular alternative voltage regulator with similar specifications and pin configuration.

2. UA7815: Another widely used alternative that provides a fixed 15V output voltage.

3. L78L15ABD: A low dropout voltage regulator with a fixed 15V output and higher output current capability.

4. LP2950-15: A low-power voltage regulator with a fixed 15V output and ultra-low quiescent current.

These alternative models offer similar functionality and can be used as substitutes for the MC78L15ACDR2G in various applications.

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