L4931CD50

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize the output voltage in electronic circuits
• Characteristics: Low dropout voltage, high output current capability, thermal shutdown protection
• Package: TO-220, DPAK, SO-8
• Essence: Linear voltage regulator
• Packaging/Quantity: Available in reels or tubes, quantity depends on supplier

Specifications

• Input Voltage Range: 4.4V to 26V
• Output Voltage: 5V
• Output Current: Up to 250mA
• Dropout Voltage: 0.6V (typical)
• Quiescent Current: 5mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931CD50 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 L4931CD50 has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Output Current Capability: With an output current capability of up to 250mA, this voltage regulator can handle a wide range of applications.
• Thermal Shutdown Protection: The device includes built-in thermal shutdown protection, which prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation. - High output current capability allows for versatile use. - Thermal shutdown protection enhances reliability.

Disadvantages: - Limited output current compared to higher-rated regulators. - May require additional components for specific applications.

Working Principles

The L4931CD50 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor accordingly. The dropout voltage is minimized by using a low dropout (LDO) design, allowing the regulator to maintain regulation even when the input voltage is close to the desired output voltage.

Detailed Application Field Plans

The L4931CD50 can be used in various electronic circuits where a stable 5V power supply is required. Some common application fields include:

1. Embedded Systems: Provides regulated power to microcontrollers, sensors, and other components in embedded systems.
2. Consumer Electronics: Used in devices such as smartphones, tablets, and portable audio players to ensure stable power supply to critical components.
3. Automotive Electronics: Suitable for automotive applications requiring a regulated 5V power source, such as infotainment systems or engine control units.

Detailed and Complete Alternative Models

1. LM1117-5.0: Similar voltage regulator with adjustable output voltage.
2. AMS1117-5.0: Low dropout voltage regulator with fixed 5V output.
3. LT1086: High current, adjustable voltage regulator with thermal shutdown protection.

These alternative models offer similar functionality and can be considered as alternatives to the L4931CD50 depending on specific requirements.

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