SPX1587T-L-1-5

Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High precision - Low dropout voltage - Adjustable output voltage - Thermal shutdown protection - Short circuit current limit

Package: TO-220

Essence: The SPX1587T-L-1-5 is a voltage regulator IC that provides a stable output voltage with high precision and low dropout voltage. It is commonly used in various electronic devices to regulate and maintain a constant voltage level.

Packaging/Quantity: The SPX1587T-L-1-5 is available in a TO-220 package, which is a widely used package type for power semiconductors. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 4.75V to 7V
• Output Voltage Range: 1.5V to 5.5V
• Dropout Voltage: 1.2V (typical)
• Output Current: Up to 3A
• Line Regulation: 0.02% (typical)
• Load Regulation: 0.04% (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The SPX1587T-L-1-5 has the following pin configuration:

```

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| | --| VIN GND |-- --| VOUT ADJ |-- |___________| ```

• VIN: Input voltage
• GND: Ground
• VOUT: Output voltage
• ADJ: Adjustable pin for setting the output voltage

Functional Features

• High Precision: The SPX1587T-L-1-5 offers high precision voltage regulation, ensuring a stable output voltage even under varying input conditions.
• Low Dropout Voltage: With a low dropout voltage of 1.2V, the IC can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
• Adjustable Output Voltage: The ADJ pin allows for easy adjustment of the output voltage within the specified range.
• Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, which prevents damage due to excessive temperature.
• Short Circuit Current Limit: It also features short circuit current limit protection, safeguarding the IC and connected components from excessive current.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Low dropout voltage - Adjustable output voltage - Thermal shutdown protection - Short circuit current limit

Disadvantages: - Limited input voltage range (4.75V to 7V) - Maximum output current limited to 3A

Working Principles

The SPX1587T-L-1-5 operates as a linear voltage regulator. It uses a pass transistor to regulate the output voltage based on the difference between the input and desired output voltage. The adjustable pin (ADJ) allows the user to set the desired output voltage within the specified range. The IC continuously monitors the output voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Application Field Plans

The SPX1587T-L-1-5 finds applications in various electronic devices that require a stable and regulated power supply. Some common application fields include:

1. Consumer Electronics: Used in smartphones, tablets, portable media players, and other battery-powered devices to regulate the voltage for different components.
2. Automotive Electronics: Employed in automotive systems such as infotainment systems, navigation units, and engine control modules to ensure stable power supply.
3. Industrial Equipment: Utilized in industrial automation systems, control panels, and motor drives to provide regulated power for reliable operation.
4. Telecommunications: Integrated into networking equipment, routers, switches, and communication devices to maintain a constant voltage level.

Alternative Models

1. LM317T: A popular alternative with similar specifications and adjustable output voltage capability.
2. LT1084CP-5: Offers higher output current capability (up to 5A) while maintaining low dropout voltage.
3. LM1117-3.3: Fixed output voltage regulator with a voltage rating of 3.3V.

These alternative models can be considered based on specific requirements and compatibility with the application.

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