L7818CV-DG

Product Overview

Category

L7818CV-DG belongs to the category of voltage regulators.

Use

It is primarily used for regulating and stabilizing voltage in electronic circuits.

Characteristics

• Input Voltage Range: 20V to 35V
• Output Voltage: 18V
• Maximum Output Current: 1.5A
• Dropout Voltage: 2V
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-220
• Mounting Style: Through Hole

Packaging/Quantity

The L7818CV-DG is typically packaged in a tube or reel, containing a quantity of 50 units per package.

Specifications

• Input Voltage Range: 20V to 35V
• Output Voltage: 18V
• Output Current: Up to 1.5A
• Dropout Voltage: 2V
• Line Regulation: ±0.04%
• Load Regulation: ±0.3%
• Ripple Rejection Ratio: 62dB
• Quiescent Current: 6mA
• Thermal Shutdown Protection: Yes
• Short Circuit Protection: Yes

Pin Configuration

The L7818CV-DG has three pins:

1. Input (VIN): This pin is connected to the input voltage source.
2. Ground (GND): This pin is connected to the ground reference.
3. Output (VOUT): This pin provides the regulated output voltage.

Functional Features

• Voltage Regulation: The L7818CV-DG ensures a stable output voltage of 18V regardless of input voltage fluctuations.
• Overcurrent Protection: It incorporates short circuit protection to prevent damage to the device and the connected circuitry.
• Thermal Shutdown: In case of excessive temperature rise, the regulator shuts down to avoid overheating.

Advantages and Disadvantages

Advantages

• High output current capability of up to 1.5A.
• Wide input voltage range allows for versatile applications.
• Excellent line and load regulation ensures stable performance.
• Built-in protection features enhance reliability.

Disadvantages

• Dropout voltage of 2V may limit its use in low voltage applications.
• TO-220 package may require additional heat sinking for high power dissipation.

Working Principles

The L7818CV-DG is a linear voltage regulator that utilizes a series pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

The L7818CV-DG finds applications in various electronic systems, including but not limited to: - Power supplies - Audio amplifiers - Industrial control systems - Automotive electronics - Battery charging circuits

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to L7818CV-DG are: - LM7818: A similar voltage regulator from Texas Instruments. - UA7818: Another alternative from Fairchild Semiconductor. - MC7818: A compatible model from ON Semiconductor.

These alternative models offer similar specifications and functionality, providing flexibility in design choices.

In conclusion, the L7818CV-DG is a voltage regulator with an input voltage range of 20V to 35V, an output voltage of 18V, and a maximum output current of 1.5A. It is commonly used in various electronic applications and offers advantages such as high output current capability and built-in protection features. However, it has limitations like a dropout voltage of 2V and potential heat dissipation concerns. Alternative models like LM7818, UA7818, and MC7818 can be considered for similar applications.