SPX3819S-L-1-2/TR

Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output voltage accuracy - Low quiescent current - Thermal shutdown protection - Short circuit current limit

Package: SOT-23-5

Essence: The SPX3819S-L-1-2/TR is a voltage regulator IC that provides a stable output voltage with low dropout. It is commonly used in various electronic devices to regulate and maintain a constant voltage level.

Packaging/Quantity: The SPX3819S-L-1-2/TR is available in a SOT-23-5 package, which is a small surface-mount package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 2.5V to 6.0V
• Output Voltage Range: 1.2V
• Dropout Voltage: 200mV at 100mA
• Quiescent Current: 50µA
• Output Current: Up to 500mA
• Line Regulation: ±0.05%
• Load Regulation: ±0.1%
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The SPX3819S-L-1-2/TR has the following pin configuration:

```

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| | --| V IN|-- Pin 1: Input Voltage --| GND |-- Pin 2: Ground --| V OUT|-- Pin 3: Output Voltage --| NC |-- Pin 4: No Connection --| EN |-- Pin 5: Enable/Shutdown Control |____| ```

Functional Features

• Low Dropout Voltage: The SPX3819S-L-1-2/TR has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Output Voltage Accuracy: It provides a high level of accuracy in maintaining the desired output voltage, ensuring stable performance of the connected electronic devices.
• Low Quiescent Current: The IC consumes very low quiescent current, minimizing power wastage and extending battery life in portable applications.
• Thermal Shutdown Protection: It incorporates thermal shutdown protection, which prevents the IC from overheating and ensures safe operation under extreme temperature conditions.
• Short Circuit Current Limit: The SPX3819S-L-1-2/TR has built-in short circuit current limiting, protecting the IC and the connected circuitry from excessive current flow during a short circuit condition.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient regulation - High output voltage accuracy ensures stable performance - Low quiescent current for power efficiency - Thermal shutdown protection for safety - Short circuit current limit protects the circuitry

Disadvantages: - Limited output voltage range (fixed at 1.2V) - Not suitable for applications requiring higher output currents

Working Principles

The SPX3819S-L-1-2/TR operates as a linear voltage regulator. It uses a pass transistor to regulate the output voltage based on the difference between the input voltage and the desired output voltage. The internal circuitry compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

The SPX3819S-L-1-2/TR finds applications in various electronic devices that require a stable and regulated power supply. Some common application fields include:

1. Portable Devices: It is used in smartphones, tablets, portable media players, and other battery-powered devices to regulate the voltage for different components.
2. Wireless Communication Systems: The IC is employed in wireless routers, access points, and other communication systems to provide a stable power source for the circuitry.
3. Automotive Electronics: It is utilized in automotive applications such as infotainment systems, GPS devices, and dashboard electronics to ensure reliable voltage regulation.
4. Industrial Control Systems: The SPX3819S-L-1-2/TR is suitable for industrial control systems, automation equipment, and sensors that require precise and stable power supply.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with an output voltage of 3.3V.
2. MCP1700-3302E/TO: Another option with an output voltage of 3.3V and low quiescent current.
3. LP2985-33DBVR: An alternative with an output voltage of 3.3V and excellent line and load regulation.

These alternative models offer similar functionality and can be used as replacements for the SPX3819S-L-1-2/TR in