SPX3940AT-L-3-3/TR

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout, Fixed Output Voltage
• Package: TO-220
• Essence: Regulates input voltage to a fixed output voltage
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 7V
• Output Voltage: 3.3V
• Dropout Voltage: 0.5V
• Maximum Output Current: 1A
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The SPX3940AT-L-3-3/TR has three pins: 1. Pin 1: Input Voltage (VIN) 2. Pin 2: Ground (GND) 3. Pin 3: Output Voltage (VOUT)

Functional Features

• Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
• Fixed output voltage of 3.3V provides a stable power supply for various applications.
• Excellent line and load regulation characteristics ensure consistent performance under varying conditions.
• Thermal shutdown and current limit protection features safeguard the IC from damage.

Advantages and Disadvantages

Advantages: - Low dropout voltage allows for efficient operation. - Fixed output voltage simplifies circuit design. - Excellent regulation characteristics ensure stable performance. - Thermal shutdown and current limit protection enhance reliability.

Disadvantages: - Limited maximum output current of 1A may not be suitable for high-power applications. - Narrow input voltage range restricts compatibility with certain systems.

Working Principles

The SPX3940AT-L-3-3/TR is a linear voltage regulator that utilizes a pass transistor to regulate the input voltage to a fixed output voltage of 3.3V. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor accordingly to maintain the desired output voltage.

Detailed Application Field Plans

The SPX3940AT-L-3-3/TR is commonly used in various electronic devices and systems that require a stable 3.3V power supply. Some typical application fields include: 1. Microcontrollers and microprocessors 2. Communication equipment 3. Audio and video devices 4. Battery-powered systems 5. Industrial control systems

Detailed and Complete Alternative Models

1. LM1117-3.3: Similar low dropout voltage regulator with a fixed output voltage of 3.3V.
2. LT1763-3.3: Low dropout linear regulator with adjustable output voltage capability.
3. TPS79633: Fixed output voltage regulator with low dropout and high PSRR (Power Supply Rejection Ratio).

These alternative models offer similar functionality and can be considered as substitutes for the SPX3940AT-L-3-3/TR depending on specific requirements.

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