SPX1431S-L/TR

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize the output voltage in electronic circuits
• Characteristics:
  • Small size
  • Low dropout voltage
  • High accuracy
  • Low quiescent current
• Package: SOT-23
• Essence: Linear voltage regulator
• Packaging/Quantity: Tape and reel, 3000 pieces per reel

Specifications

• Input Voltage Range: 2.5V to 6.0V
• Output Voltage Options: 1.8V, 2.5V, 3.0V, 3.3V, 5.0V
• Output Current: Up to 100mA
• Dropout Voltage: 200mV (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Quiescent Current: 50µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SPX1431S-L/TR has three pins:

1. VIN (Pin 1): Input voltage pin
2. GND (Pin 2): Ground pin
3. VOUT (Pin 3): Output voltage pin

Functional Features

• Provides a stable and regulated output voltage regardless of input voltage fluctuations
• Low dropout voltage allows for efficient power conversion even with low input voltages
• High accuracy ensures precise voltage regulation
• Low quiescent current minimizes power consumption when the load is light

Advantages and Disadvantages

Advantages

• Small size makes it suitable for space-constrained applications
• Wide input voltage range allows for flexibility in various electronic circuits
• High accuracy ensures reliable voltage regulation
• Low quiescent current helps conserve power in battery-powered devices

Disadvantages

• Limited output current capability (up to 100mA)
• Dropout voltage may cause a slight decrease in efficiency

Working Principles

The SPX1431S-L/TR 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 to maintain a stable output voltage.

Detailed Application Field Plans

The SPX1431S-L/TR is commonly used in various electronic devices and applications, including:

1. Battery-powered devices: Provides regulated voltage for microcontrollers, sensors, and other low-power components.
2. Portable audio players: Ensures stable power supply for audio amplifiers and digital-to-analog converters.
3. Automotive electronics: Regulates voltage for sensors, actuators, and control modules in vehicles.
4. Industrial control systems: Stabilizes voltage for PLCs, motor drivers, and other industrial automation equipment.

Detailed and Complete Alternative Models

1. SPX1431M-L/TR: Similar specifications and features, but available in a different package (SOT-89).
2. SPX1431T-L/TR: Higher output current capability (up to 200mA), but with slightly higher dropout voltage.
3. SPX1431R-L/TR: Lower quiescent current (30µA), suitable for ultra-low power applications.

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