L4931CD80

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize the output voltage in electronic circuits
• Characteristics: Low dropout voltage, high accuracy, low quiescent current
• Package: TO-252 (DPAK)
• Essence: Integrated circuit voltage regulator
• Packaging/Quantity: Available in reels of 2,500 units

Specifications

• Input Voltage Range: 4.4V to 26V
• Output Voltage: 8V
• Output Current: Up to 250mA
• Dropout Voltage: 0.5V at 100mA
• Quiescent Current: 5mA
• Line Regulation: 0.04% typical
• Load Regulation: 0.1% typical
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931CD80 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.
• High accuracy provides a stable output voltage within specified tolerances.
• Low quiescent current minimizes power consumption when the load is light.
• Overcurrent and thermal protection safeguards the device and the connected circuitry.

Advantages and Disadvantages

Advantages

• Compact and easy-to-use package.
• Wide input voltage range allows for versatile applications.
• Excellent line and load regulation characteristics ensure stable performance.
• Built-in protection features enhance reliability.

Disadvantages

• Limited output current capability may not be suitable for high-power applications.
• Dropout voltage may cause a slight power loss in low input-output voltage scenarios.

Working Principles

The L4931CD80 is a linear voltage regulator that utilizes a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage, adjusting the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The L4931CD80 finds applications in various electronic systems where a regulated 8V supply is required. Some common application fields include:

1. Battery-powered devices: Portable electronics, such as smartphones, tablets, and portable audio players, benefit from the L4931CD80's low dropout voltage and low quiescent current, extending battery life.
2. Industrial control systems: The regulator ensures stable voltage supply for microcontrollers, sensors, and other components in industrial automation systems.
3. Automotive electronics: Used in automotive modules, infotainment systems, and lighting controls, providing reliable voltage regulation in harsh environments.

Detailed and Complete Alternative Models

1. LM7808: A widely used linear voltage regulator with similar specifications and pin configuration.
2. LT1084: A high-current linear regulator suitable for applications requiring higher output currents.
3. TPS7A4700: A low-dropout voltage regulator with adjustable output voltage, offering flexibility in various applications.

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