L78L20ACD-TR

Product Overview

Category

The L78L20ACD-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 20V
• Low dropout voltage
• Short-circuit protection
• Thermal overload protection

Package

The L78L20ACD-TR comes in a small surface mount package (TO-252), also known as DPAK.

Essence

The essence of the L78L20ACD-TR is to provide a stable and regulated output voltage of 20V, ensuring proper functioning of electronic devices.

Packaging/Quantity

The L78L20ACD-TR is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 7V to 35V
• Output Voltage: 20V
• Output Current: Up to 100mA
• Dropout Voltage: 2V (max)
• Line Regulation: 0.04% (typ)
• Load Regulation: 0.1% (typ)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L20ACD-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 20V.

Functional Features

• Regulates and stabilizes the output voltage at 20V.
• Provides short-circuit protection, preventing damage to the circuit.
• Incorporates thermal overload protection, safeguarding against excessive heat.
• Low dropout voltage ensures efficient operation even with low input voltages.

Advantages

• Simple and easy to use.
• Compact surface mount package saves space on the circuit board.
• Reliable and stable output voltage.
• Suitable for a wide range of applications.

Disadvantages

• Limited output current capacity (up to 100mA).
• Dropout voltage may cause inefficiency in low input voltage scenarios.

Working Principles

The L78L20ACD-TR operates based on the principle of linear voltage regulation. It uses a series pass transistor to regulate the output voltage by adjusting the resistance between the input and output terminals. The internal circuitry compares the output voltage with a reference voltage, making necessary adjustments to maintain a constant 20V output.

Detailed Application Field Plans

The L78L20ACD-TR finds applications in various electronic devices and systems, including:

1. Power supply circuits for microcontrollers and digital ICs.
2. Battery-powered devices requiring a regulated 20V supply.
3. Industrial control systems.
4. Automotive electronics.
5. Audio amplifiers and preamplifiers.

Detailed and Complete Alternative Models

1. LM317: Adjustable linear voltage regulator with a wide input voltage range.
2. LM7805: Fixed 5V linear voltage regulator.
3. LT1086: High-current adjustable linear voltage regulator.

These alternative models offer similar functionality but may have different specifications and package options.

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