L4931ABPT120R

Product Overview

• Category: Voltage Regulator
• Use: To regulate voltage in electronic circuits
• Characteristics: Low dropout, low quiescent current, high accuracy
• Package: TO-220, DPAK, or D²PAK
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 20V
• Output Voltage Range: 1.2V to 15V
• Output Current: Up to 100mA
• Dropout Voltage: 0.4V (typical)
• Quiescent Current: 50µA (typical)
• Line Regulation: 0.05% (typical)
• Load Regulation: 0.1% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4931ABPT120R 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 differentials.
• Low quiescent current minimizes power consumption during standby or idle conditions.
• High accuracy provides precise voltage regulation for sensitive electronic components.
• Overcurrent and thermal protection safeguards the regulator and connected circuitry.

Advantages

• Compact package options allow for easy integration into various circuit designs.
• Wide input voltage range enables compatibility with a wide range of power sources.
• Excellent line and load regulation ensure stable output voltage under varying conditions.
• Robust protection features enhance the reliability and longevity of the regulator.

Disadvantages

• Limited output current capability may not be suitable for high-power applications.
• Higher dropout voltage compared to some other voltage regulators may result in higher power dissipation.

Working Principles

The L4931ABPT120R is a linear voltage regulator that utilizes a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage, adjusting the pass transistor's resistance to maintain a constant output voltage. The dropout voltage is the minimum voltage difference required between the input and output for proper regulation.

Detailed Application Field Plans

The L4931ABPT120R finds applications in various electronic devices and systems, including:

1. Battery-powered devices: Portable electronics, handheld instruments, etc.
2. Automotive electronics: Infotainment systems, navigation units, etc.
3. Industrial control systems: Sensors, actuators, motor control, etc.
4. Communication equipment: Routers, switches, modems, etc.
5. Consumer electronics: Set-top boxes, audio amplifiers, gaming consoles, etc.

Detailed and Complete Alternative Models

1. LM1117-ADJ: Adjustable output voltage, up to 800mA output current.
2. LT1763-3.3: Fixed 3.3V output voltage, low dropout voltage, up to 500mA output current.
3. TPS7A4700: Ultra-low noise, adjustable output voltage, up to 1A output current.

(Note: This list is not exhaustive and serves as an example of alternative models.)

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