MC7818CD2TR4G

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Fixed Output, Positive Voltage Regulator
• Package: D2PAK-3
• Essence: Provides a stable and regulated output voltage
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 20V to 35V
• Output Voltage: 18V
• Output Current: Up to 1A
• Dropout Voltage: 2V (maximum)
• Line Regulation: 0.01%/V
• Load Regulation: 0.5%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MC7818CD2TR4G has three pins:

1. Pin 1: Input Voltage (VIN)
2. Pin 2: Ground (GND)
3. Pin 3: Output Voltage (VOUT)

Functional Features

• Fixed output voltage of 18V
• Low dropout voltage for efficient operation
• Overcurrent and thermal protection
• Short-circuit protection
• Wide input voltage range
• High reliability and stability

Advantages and Disadvantages

Advantages: - Provides a stable and regulated output voltage - Suitable for various applications requiring an 18V power supply - Offers overcurrent and thermal protection - Compact package size

Disadvantages: - Limited output current capacity (up to 1A) - Dropout voltage may affect efficiency in low input voltage scenarios

Working Principles

The MC7818CD2TR4G is a positive voltage regulator that maintains a constant output voltage of 18V regardless of changes in the input voltage or load conditions. It achieves this by using a series pass transistor that adjusts the current flowing through it to maintain the desired output voltage. The regulator also incorporates protection features to safeguard against overcurrent, thermal overload, and short-circuit conditions.

Detailed Application Field Plans

The MC7818CD2TR4G is commonly used in various electronic devices and systems that require a stable 18V power supply. Some typical application fields include:

1. Industrial Control Systems: Used to regulate voltage in control panels, motor drives, and PLCs.
2. Automotive Electronics: Provides regulated power for automotive sensors, actuators, and control modules.
3. Audio Amplifiers: Ensures a constant voltage supply for audio amplification circuits.
4. Power Supply Units: Used as a voltage regulator in power supplies for computers, telecommunication equipment, and other electronic devices.

Detailed and Complete Alternative Models

• LM7818: Similar fixed-output positive voltage regulator with a TO-220 package.
• UA7818: Fixed 18V voltage regulator with a TO-220 package.
• L78S18CV: Positive voltage regulator with an adjustable output voltage range of 18V, available in a TO-220 package.

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