SPX3819S-L-3-3/TR

Overview

Product Category: Voltage Regulator

Use: The SPX3819S-L-3-3/TR is a voltage regulator that provides a stable output voltage for electronic devices.

Characteristics: - Input Voltage Range: 2.5V to 16V - Output Voltage: 3.3V - Maximum Output Current: 500mA - Low Dropout Voltage: 300mV at 500mA - Low Quiescent Current: 75µA - Thermal Shutdown Protection - Short Circuit Protection

Package: SOT-23-5

Essence: The SPX3819S-L-3-3/TR is an essential component in electronic circuits that require a regulated power supply.

Packaging/Quantity: The SPX3819S-L-3-3/TR is typically sold in reels containing 3000 units.

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage: 3.3V ±2%
• Output Current: Up to 500mA
• Dropout Voltage: 300mV at 500mA
• Quiescent Current: 75µA
• Line Regulation: 0.05% typical
• Load Regulation: 0.1% typical
• Ripple Rejection: 70dB typical
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOT-23-5

Pin Configuration

The SPX3819S-L-3-3/TR has the following pin configuration:

```

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| | --| V+ |-- --| |-- --| GND|-- --| |-- --| Vout|-- |____| ```

Pin Descriptions: - V+: Input Voltage - GND: Ground - Vout: Output Voltage

Functional Features

1. Voltage Regulation: The SPX3819S-L-3-3/TR maintains a stable output voltage of 3.3V, regardless of input voltage fluctuations.
2. Low Dropout Voltage: With a dropout voltage of only 300mV at 500mA, the regulator can operate efficiently even with low input voltages.
3. Low Quiescent Current: The device consumes only 75µA of current when in standby mode, minimizing power consumption.
4. Thermal Shutdown Protection: The regulator includes built-in thermal shutdown protection to prevent overheating and damage.
5. Short Circuit Protection: In case of a short circuit, the SPX3819S-L-3-3/TR automatically shuts down to protect the circuit.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications. - Low dropout voltage ensures efficient operation. - Low quiescent current minimizes power consumption. - Thermal shutdown and short circuit protection enhance reliability.

Disadvantages: - Limited maximum output current of 500mA may not be sufficient for high-power applications. - SOT-23-5 package may require additional space on the PCB.

Working Principles

The SPX3819S-L-3-3/TR is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the output voltage to a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage of 3.3V. The regulator operates by dissipating excess voltage as heat, which is why it has a dropout voltage and requires an input voltage higher than the desired output voltage.

Detailed Application Field Plans

The SPX3819S-L-3-3/TR is commonly used in various electronic devices and applications, including but not limited to: - Battery-powered devices - Portable audio players - Wireless communication systems - Microcontrollers and embedded systems - Automotive electronics - Industrial control systems

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and package type.
2. MCP1700-3302E/TO: Another alternative with a slightly lower dropout voltage and higher maximum output current.
3. LP2985-33DBVR: An alternative with a smaller SOT-23-3 package and lower quiescent current.

These alternative models offer similar functionality and can be used as replacements for the SPX3819S-L-3-3/TR depending on specific requirements and availability.

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