AS78L05RTR-E1

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize voltage in electronic circuits
• Characteristics:
  • Low dropout voltage
  • High output current capability
  • Thermal shutdown protection
• Package: TO-252 (DPAK)
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 7V to 20V
• Output Voltage: 5V
• Output Current: Up to 100mA
• Dropout Voltage: 2V (maximum)
• Quiescent Current: 5mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The AS78L05RTR-E1 voltage regulator 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

• Voltage Regulation: The AS78L05RTR-E1 maintains a constant output voltage of 5V, regardless of changes in the input voltage or load conditions.
• Low Dropout Voltage: With a maximum dropout voltage of 2V, this regulator can operate efficiently even when the input voltage is close to the desired output voltage.
• High Output Current Capability: Capable of supplying up to 100mA of current to power various electronic components.
• Thermal Shutdown Protection: Built-in thermal protection mechanism that shuts down the regulator if it exceeds the safe operating temperature range, preventing damage to the device.

Advantages and Disadvantages

Advantages: - Simple and easy to use. - Provides stable and regulated output voltage. - Suitable for low-power applications. - Compact package size.

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

Working Principles

The AS78L05RTR-E1 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage. The regulator operates in a "dropout" mode, where it can still provide a regulated output voltage even when the input voltage is slightly lower than the desired output voltage.

Detailed Application Field Plans

The AS78L05RTR-E1 voltage regulator finds applications in various electronic devices and circuits, including:

1. Power Supplies: Used in low-power applications where a stable 5V power source is required.
2. Microcontrollers: Provides a regulated voltage supply to microcontrollers, ensuring proper operation.
3. Sensor Circuits: Used to power sensors and ensure accurate readings by maintaining a stable voltage supply.
4. Audio Amplifiers: Provides a regulated voltage to audio amplifiers, preventing distortion and ensuring consistent performance.

Detailed and Complete Alternative Models

1. LM7805: A widely used linear voltage regulator with similar specifications and pin configuration.
2. MC78L05: Another popular choice for regulating 5V voltage with comparable characteristics.
3. LP2950: Low dropout voltage regulator suitable for low-power applications.

These alternative models offer similar functionality and can be used as substitutes for the AS78L05RTR-E1 depending on specific requirements.

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