L78L33ACD13TR

Basic Information Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage in electronic circuits
• Characteristics: Low dropout voltage, high output current capability, thermal overload protection
• Package: TO-252 (DPAK)
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 2,500 units per reel

Specifications

• Input Voltage Range: 4.75V to 20V
• Output Voltage: 3.3V
• Output Current: Up to 100mA
• Dropout Voltage: 1.7V (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.1% (typical)
• Quiescent Current: 5mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L33ACD13TR has three pins: 1. Input (VIN): Connects to the input voltage source. 2. Ground (GND): Connected to the ground reference of the circuit. 3. Output (VOUT): Provides the regulated output voltage.

Functional Features

• Low dropout voltage: The L78L33ACD13TR maintains a stable output voltage even when the input voltage is close to the desired output voltage.
• High output current capability: It can deliver up to 100mA of current to power various components in the circuit.
• Thermal overload protection: The regulator includes built-in protection against excessive heat, ensuring safe operation even under demanding conditions.

Advantages and Disadvantages

Advantages: - Simple and easy to use. - Provides a stable output voltage. - Suitable for low-power applications. - Offers thermal overload protection.

Disadvantages: - Limited output current capability. - Requires an input voltage higher than the desired output voltage.

Working Principles

The L78L33ACD13TR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant output voltage. The dropout voltage is minimized by using a low dropout (LDO) design, allowing the regulator to operate with a small difference between the input and output voltages.

Detailed Application Field Plans

The L78L33ACD13TR is commonly used in various electronic devices and circuits, including: 1. Battery-powered devices: Provides a stable voltage supply for microcontrollers, sensors, and other low-power components. 2. Automotive applications: Regulates voltage for automotive electronics, such as infotainment systems, lighting controls, and engine management systems. 3. Industrial equipment: Ensures a reliable power source for control systems, sensors, and communication modules. 4. Consumer electronics: Used in portable devices like smartphones, tablets, and digital cameras to maintain a consistent voltage level.

Detailed and Complete Alternative Models

1. LM317: Adjustable voltage regulator with a wide input voltage range and high output current capability.
2. LM7805: Fixed 5V voltage regulator suitable for powering digital logic circuits.
3. LT1084: High-current adjustable voltage regulator with low dropout voltage and thermal overload protection.

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