L4931ABDT120R

Product Overview

• Category: Voltage Regulator
• Use: To regulate voltage in electronic circuits
• Characteristics:
  • Low dropout voltage
  • High output current capability
  • Thermal shutdown protection
• Package: TO-252 (DPAK)
• Essence: Provides stable and regulated voltage output
• Packaging/Quantity: Available in reels of 2,500 units

Specifications

• Input Voltage Range: 4.4V to 20V
• Output Voltage: 1.2V
• Output Current: Up to 100mA
• Dropout Voltage: 0.6V at 100mA
• Quiescent Current: 5mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The L4931ABDT120R 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: The L4931ABDT120R exhibits a low dropout voltage, ensuring efficient regulation even when the input voltage is close to the desired output voltage.
• High Output Current Capability: With an output current capability of up to 100mA, this voltage regulator can handle a wide range of applications.
• Thermal Shutdown Protection: The device incorporates thermal shutdown protection, which prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages

• Provides stable and regulated voltage output.
• Suitable for low-power applications.
• Compact package size allows for easy integration into various circuit designs.
• Offers thermal shutdown protection, enhancing reliability.

Disadvantages

• Limited output current capability compared to higher-rated voltage regulators.
• Not suitable for high-power applications.

Working Principles

The L4931ABDT120R is a linear voltage regulator that operates by comparing the output voltage with an internal reference. It adjusts the resistance between the input and output pins to maintain a constant output voltage, compensating for changes in the input voltage and load conditions.

Detailed Application Field Plans

The L4931ABDT120R is commonly used in various electronic devices and circuits, including:

1. Battery-powered devices: Provides stable voltage supply for microcontrollers, sensors, and other low-power components.
2. Communication systems: Ensures consistent voltage levels for RF modules, transceivers, and signal processing circuits.
3. Automotive electronics: Used in automotive control units, infotainment systems, and lighting applications.
4. Industrial automation: Suitable for powering sensors, actuators, and control circuitry in industrial equipment.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with a fixed output voltage of 3.3V and higher output current capability.
2. LT1763: Offers adjustable output voltage and lower dropout voltage than the L4931ABDT120R.
3. MCP1700: Another low dropout voltage regulator available in various output voltage options.

These alternative models provide similar functionality and can be considered based on specific application requirements.

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