L78L15CD-TR

Product Overview

Category

The L78L15CD-TR belongs to the category of linear voltage regulators.

Use

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

Characteristics

• Linear voltage regulator
• Fixed output voltage of 15V
• Low dropout voltage
• High ripple rejection
• Thermal overload protection
• Short-circuit protection

Package

The L78L15CD-TR comes in a TO-252 package, also known as DPAK (Plastic Packaged Surface Mount).

Essence

The essence of the L78L15CD-TR is to provide a stable and regulated output voltage of 15V.

Packaging/Quantity

The L78L15CD-TR is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 17V to 35V
• Output Voltage: 15V
• Output Current: Up to 100mA
• Dropout Voltage: 2V (max)
• Ripple Rejection: 60dB (typ)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The L78L15CD-TR 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 of 15V.

Functional Features

• Voltage regulation: The L78L15CD-TR ensures a constant output voltage of 15V regardless of input voltage fluctuations.
• Overload protection: It incorporates thermal overload protection, safeguarding the device from excessive heat.
• Short-circuit protection: The regulator automatically shuts down in case of a short circuit, preventing damage to the circuitry.
• Ripple rejection: The L78L15CD-TR exhibits high ripple rejection, minimizing the impact of AC voltage fluctuations.

Advantages and Disadvantages

Advantages

• Simple to use and integrate into electronic circuits.
• Provides a stable output voltage, ensuring reliable operation of connected components.
• Offers protection against thermal overload and short circuits.
• High ripple rejection enhances the quality of the regulated output.

Disadvantages

• Limited output current capacity (up to 100mA).
• Dropout voltage of 2V may not be suitable for applications with low input voltages.

Working Principles

The L78L15CD-TR operates on the principle of linear voltage regulation. It utilizes a series pass transistor to regulate the output voltage. When the input voltage exceeds the desired output voltage, the regulator adjusts the pass transistor to maintain a constant output voltage. This ensures that the load receives a stable and regulated 15V supply.

Detailed Application Field Plans

The L78L15CD-TR finds applications in various electronic systems, including but not limited to:

1. Power supply units: Used to regulate the voltage supplied to different components within power supply circuits.
2. Audio amplifiers: Ensures a stable power source for audio amplification stages, reducing noise and distortion.
3. Industrial control systems: Provides regulated voltage for control circuitry, ensuring accurate and reliable operation.
4. Automotive electronics: Used in automotive applications where a stable voltage is required for sensors, actuators, and other electronic components.

Detailed and Complete Alternative Models

1. LM7815: A popular alternative from Texas Instruments with similar specifications and pin configuration.
2. MC7815: An alternative from ON Semiconductor offering comparable performance and compatibility.
3. UA7815: Another alternative from Fairchild Semiconductor, providing a fixed 15V output voltage.

These alternative models can be considered based on specific requirements and availability.

Word count: 511 words