L78L12ACZ-TR

Overview

Product Category

The L78L12ACZ-TR belongs to the category of voltage regulators.

Use

This product is commonly used in electronic circuits to regulate and stabilize the output voltage.

Characteristics

• Voltage Regulation: The L78L12ACZ-TR provides a fixed output voltage of 12V.
• Low Dropout: It has a low dropout voltage, ensuring efficient regulation even when the input voltage is close to the desired output voltage.
• Current Limiting: The device incorporates current limiting protection to prevent damage due to excessive current flow.
• Thermal Overload Protection: It includes thermal shutdown circuitry to safeguard against overheating.

Package

The L78L12ACZ-TR is available in a TO-92 package. This package is compact and suitable for through-hole mounting.

Essence

The essence of the L78L12ACZ-TR lies in its ability to provide a stable and regulated output voltage, making it an essential component in various electronic applications.

Packaging/Quantity

The L78L12ACZ-TR is typically packaged in reels or tubes, containing a specific quantity of devices per package. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Input Voltage Range: 14V to 35V
• Output Voltage: 12V
• Output Current: Up to 100mA
• Dropout Voltage: 2V (max)
• Quiescent Current: 4.5mA (typ)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The L78L12ACZ-TR 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 L78L12ACZ-TR maintains a constant output voltage of 12V, regardless of variations in the input voltage or load conditions.
• Current Limiting: It incorporates current limiting protection to prevent excessive current flow, ensuring the safety of the connected circuitry.
• Thermal Overload Protection: The device includes thermal shutdown circuitry, which activates when the temperature exceeds a certain threshold, preventing damage due to overheating.

Advantages and Disadvantages

Advantages

• Compact Size: The TO-92 package makes it suitable for space-constrained applications.
• Easy to Use: The three-pin configuration simplifies the integration into electronic circuits.
• Stable Output: The L78L12ACZ-TR provides a stable and regulated output voltage, ensuring reliable performance.

Disadvantages

• Limited Output Current: With a maximum output current of 100mA, it may not be suitable for high-power applications.
• Dropout Voltage: The 2V dropout voltage can limit its efficiency in low-input voltage scenarios.

Working Principles

The L78L12ACZ-TR is a linear voltage regulator that operates by comparing the output voltage with an internal reference voltage. It adjusts the resistance within the device to maintain a constant output voltage, compensating for changes in the input voltage and load conditions.

Detailed Application Field Plans

The L78L12ACZ-TR finds application in various electronic systems, including but not limited to: - Power supplies for microcontrollers and other digital ICs - Battery-powered devices requiring a stable voltage source - Automotive electronics - Audio amplifiers and preamplifiers - Industrial control systems

Detailed and Complete Alternative Models

Some alternative models to the L78L12ACZ-TR include: - LM7812: A popular voltage regulator with similar specifications and pin configuration. - MC78L12: Another commonly used linear voltage regulator offering a fixed 12V output. - UA7812: A series of positive voltage regulators with various output current options.

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

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