STEF12EPUR

Product Overview

Category: Electronic Component
Use: Voltage Regulator
Characteristics: High Efficiency, Low Dropout, Low Noise
Package: TO-220
Essence: Linear Regulator
Packaging/Quantity: Tape and Reel / 1000 units per reel

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: 1.2V to 15V
• Output Current: Up to 1A
• Dropout Voltage: 0.3V (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.1% (typical)
• Quiescent Current: 75µA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The STEF12EPUR follows the standard TO-220 package pin configuration:

1. Vout (Output Voltage)
2. GND (Ground)
3. Vin (Input Voltage)

Functional Features

• High efficiency with low dropout voltage ensures minimal power dissipation.
• Low noise output provides clean and stable voltage for sensitive applications.
• Excellent line and load regulation guarantees accurate voltage output.
• Wide input voltage range allows flexibility in various power supply designs.
• Thermal shutdown and current limit protection ensure safe operation.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption. - Low dropout voltage enables operation with low input voltages. - Low noise output is ideal for noise-sensitive applications. - Compact TO-220 package facilitates easy integration into circuit designs. - Wide input voltage range accommodates diverse power supply requirements.

Disadvantages: - Limited output current may not be suitable for high-power applications. - Linear regulator design leads to higher power dissipation compared to switching regulators. - Higher cost compared to some alternative voltage regulator solutions.

Working Principles

The STEF12EPUR is a linear voltage regulator that operates by maintaining a constant output voltage regardless of variations in the input voltage or load conditions. It achieves this by using a pass transistor to regulate the voltage drop across it, ensuring a stable output voltage. The device employs feedback control to continuously adjust the pass transistor's resistance, compensating for changes in the input voltage and load current.

Detailed Application Field Plans

The STEF12EPUR finds applications in various electronic systems where a stable and regulated voltage supply is required. Some common application fields include:

1. Consumer Electronics: Powering microcontrollers, sensors, and display modules.
2. Automotive Electronics: Providing regulated voltage for automotive control units.
3. Industrial Automation: Supplying power to PLCs, motor drives, and sensors.
4. Telecommunications: Regulating voltage for communication devices and base stations.
5. Medical Equipment: Powering medical instruments and diagnostic devices.

Detailed and Complete Alternative Models

1. LM317: A popular adjustable linear voltage regulator with similar specifications.
2. LT1084: High-current linear regulator with low dropout voltage and adjustable output.
3. LM1117: Low dropout voltage regulator available in various fixed output voltages.
4. L78xx: Series of fixed output voltage linear regulators with different current ratings.
5. TPS7A47: Ultra-low noise linear regulator suitable for audio and precision applications.

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