L78L12ACD13TR

Basic Information Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage levels in electronic circuits
• Characteristics:
  • Low dropout voltage
  • Output current up to 100 mA
  • Fixed output voltage of 12V
• Package: SOT-89
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

• Input Voltage Range: 14V to 35V
• Output Voltage: 12V ±5%
• Dropout Voltage: 1.7V (typical)
• Output Current: Up to 100 mA
• Line Regulation: 0.04% (typical)
• Load Regulation: 0.2% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L12ACD13TR 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.

Functional Features

• Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
• Fixed output voltage eliminates the need for external resistors or adjustments.
• Overcurrent and thermal protection safeguards the device and connected circuitry.
• Short-circuit protection prevents damage in case of a fault.

Advantages

• Simple and cost-effective solution for voltage regulation.
• Compact package size allows for space-saving designs.
• Wide operating temperature range enables usage in various environments.
• Reliable and stable output voltage for consistent performance.

Disadvantages

• Limited output current capability may not be suitable for high-power applications.
• Dropout voltage can cause power dissipation and efficiency loss.
• Fixed output voltage restricts flexibility in voltage selection.

Working Principles

The L78L12ACD13TR is a linear voltage regulator that utilizes a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage, adjusting the pass transistor's resistance to maintain a constant output voltage. The dropout voltage is the minimum voltage required for the regulator to function correctly.

Detailed Application Field Plans

The L78L12ACD13TR is commonly used in various electronic applications, including: 1. Power supplies for microcontrollers and other low-power digital circuits. 2. Battery-powered devices requiring a stable 12V supply. 3. Automotive electronics, such as dashboard displays and audio systems. 4. Industrial control systems and instrumentation. 5. Consumer electronics, such as audio/video equipment and home appliances.

Detailed and Complete Alternative Models

• LM7805: 5V fixed output voltage regulator, suitable for lower voltage requirements.
• LM317: Adjustable output voltage regulator, offering flexibility in voltage selection.
• LT1084: High-current adjustable voltage regulator, ideal for power-hungry applications.
• LM1117: Low dropout voltage regulator, suitable for battery-powered devices.

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