SPX3819S-L-2-5

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-2-5 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-2-5 is typically sold in reels or tubes, containing a quantity of 3000 units per reel/tube.

Specifications

• Input Voltage Range: 2.5V to 6.0V
• Output Voltage: 2.5V
• Dropout Voltage: 200mV at 100mA
• Quiescent Current: 120µA
• Output Current: 500mA
• Line Regulation: 0.05%/V
• Load Regulation: 0.1%/mA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SPX3819S-L-2-5 has five pins arranged as follows:

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Pin 1: Input Voltage (VIN)

Pin 2: Ground (GND)

Pin 3: Enable (EN)

Pin 4: Bypass Capacitor (BYP)

Pin 5: Output Voltage (VOUT)

Functional Features

1. Low Dropout Voltage: The SPX3819S-L-2-5 exhibits a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.

2. High Output Voltage Accuracy: This voltage regulator provides a high level of accuracy in maintaining the desired output voltage, ensuring stable performance of the connected electronic devices.

3. Low Quiescent Current: The IC has a low quiescent current, minimizing power consumption when the load is light or idle.

4. Thermal Shutdown Protection: The SPX3819S-L-2-5 incorporates thermal shutdown protection, which prevents the IC from overheating and ensures its safe operation.

5. Short Circuit Current Limit: It features a short circuit current limit that protects 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 even with low input voltages. - High output voltage accuracy ensures stable performance of connected devices. - Low quiescent current minimizes power consumption. - Thermal shutdown protection prevents overheating and damage. - Short circuit current limit protects against excessive current flow.

Disadvantages: - Limited to a fixed output voltage of 2.5V. - May require additional external components for specific applications.

Working Principles

The SPX3819S-L-2-5 operates as a linear voltage regulator. It regulates the output voltage by comparing the reference voltage with the feedback voltage obtained from the output. The internal circuitry adjusts the pass transistor to maintain a constant output voltage, compensating for changes in the input voltage and load conditions.

Detailed Application Field Plans

The SPX3819S-L-2-5 finds application in various electronic devices where a stable and regulated voltage supply is required. Some common application fields include:

1. Battery-Powered Devices: Portable electronic devices such as smartphones, tablets, and portable media players often utilize the SPX3819S-L-2-5 to regulate the voltage supplied by the battery.

2. Embedded Systems: Microcontrollers, sensors, and other components in embedded systems often require a stable voltage supply, which can be achieved using the SPX3819S-L-2-5.

3. Automotive Electronics: The IC is suitable for automotive applications where regulated voltage is essential for proper operation of various electronic modules.

4. Industrial Control Systems: Voltage regulation is crucial in industrial control systems to ensure reliable and accurate operation of control circuits and sensors.

Detailed and Complete Alternative Models

1. LM1117-2.5: This voltage regulator offers similar specifications and features as the SPX3819S-L-2-5, with a fixed output voltage of 2.5V.

2. MCP1700-2502E/TO: Another alternative with a fixed 2.5V output voltage, providing low dropout and high accuracy.

3. LP2985-2.5: This IC also regulates the output voltage to 2.5V, featuring low dropout, low quiescent current, and thermal shutdown protection.

These alternative models can