L78L12ABD-TR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - Output current up to 100 mA - Fixed output voltage of 12V - Thermal overload protection - Short-circuit protection - Output voltage accuracy ±2%

Package: TO-252 (DPAK)

Essence: The L78L12ABD-TR is a linear voltage regulator IC designed to provide a fixed output voltage of 12V with a maximum output current of 100 mA. It is commonly used in various electronic devices to regulate and stabilize the voltage supply.

Packaging/Quantity: The L78L12ABD-TR is available in a TO-252 package, also known as DPAK (Plastic Package). It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 14V to 35V
• Output Voltage: 12V
• Output Current: Up to 100 mA
• Dropout Voltage: 1.7V (typical)
• Quiescent Current: 4 mA (typical)
• Line Regulation: 50 mV (typical)
• Load Regulation: 100 mV (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L12ABD-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 of 12V.

Functional Features

• Low Dropout Voltage: The L78L12ABD-TR exhibits a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Thermal Overload Protection: The IC incorporates thermal overload protection, which prevents damage due to excessive heat by shutting down the regulator temporarily.
• Short-Circuit Protection: The L78L12ABD-TR includes short-circuit protection, safeguarding the device and the connected circuitry from potential damage in case of a short circuit.
• Output Voltage Accuracy: The IC provides a high level of output voltage accuracy, with a tolerance of ±2%.

Advantages and Disadvantages

Advantages: - Simple and easy to use - Low dropout voltage ensures efficient regulation - Thermal and short-circuit protection enhance reliability - Compact TO-252 package allows for space-saving designs

Disadvantages: - Limited output current capability (up to 100 mA) - Fixed output voltage may not be suitable for all applications

Working Principles

The L78L12ABD-TR operates as a linear voltage regulator. It uses a pass transistor to regulate the output voltage based on the difference between the input and desired output voltage. The internal circuitry compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage of 12V.

Detailed Application Field Plans

The L78L12ABD-TR finds applications in various electronic devices that require a regulated 12V power supply. Some common application areas include: - Consumer electronics - Automotive electronics - Industrial control systems - Power management circuits - Battery-powered devices

Detailed and Complete Alternative Models

1. LM7812: This is a popular alternative model from Texas Instruments with similar specifications and pin configuration.
2. MC7812: Another alternative model from ON Semiconductor, offering comparable performance and compatibility.
3. UA7812: A voltage regulator IC from Fairchild Semiconductor, providing a fixed 12V output with similar characteristics.

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

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