SPX1587AR-L/TR

Product Overview

• Category: Voltage Regulator
• Use: Provides a stable output voltage for electronic circuits
• Characteristics:
  • High precision and low dropout voltage
  • Adjustable output voltage
  • Overcurrent and thermal protection
• Package: TO-252-3 (DPAK)
• Essence: Voltage regulation
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.75V to 7V
• Output Voltage Range: 1.25V to 5.5V
• Output Current: Up to 3A
• Dropout Voltage: 1.2V typical at 3A load
• Line Regulation: ±0.05% typical
• Load Regulation: ±0.1% typical
• Quiescent Current: 10mA typical
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The SPX1587AR-L/TR has three pins in the TO-252-3 package:

1. Pin 1 (Input): Connects to the input voltage source.
2. Pin 2 (Ground): Connected to the ground reference.
3. Pin 3 (Output): Provides the regulated output voltage.

Functional Features

• High Precision: The SPX1587AR-L/TR 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 at 3A load, this voltage regulator minimizes power dissipation and improves efficiency.
• Adjustable Output Voltage: The output voltage can be adjusted using external resistors, allowing flexibility in various applications.
• Overcurrent and Thermal Protection: The device incorporates overcurrent and thermal protection mechanisms to safeguard against excessive current and temperature conditions.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Low dropout voltage - Adjustable output voltage - Overcurrent and thermal protection

Disadvantages: - Limited input voltage range (4.75V to 7V) - Relatively high quiescent current (10mA)

Working Principles

The SPX1587AR-L/TR is a linear voltage regulator that utilizes a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage, adjusting the pass transistor's resistance to maintain a stable output voltage. The device employs a feedback loop to continuously monitor and adjust the output voltage, compensating for any variations in the input voltage or load conditions.

Detailed Application Field Plans

The SPX1587AR-L/TR finds applications in various electronic systems where a stable and regulated voltage supply is required. Some of the common application fields include:

1. Power Supplies: It can be used in power supply circuits to provide a stable voltage source for microcontrollers, sensors, and other electronic components.
2. Battery-Powered Devices: The voltage regulator ensures a constant voltage supply from batteries, extending the operating time of portable devices such as smartphones, tablets, and handheld instruments.
3. Automotive Electronics: It is suitable for automotive applications, providing regulated voltage for control units, infotainment systems, and lighting modules.
4. Industrial Control Systems: The SPX1587AR-L/TR can be employed in industrial control systems to regulate voltages for PLCs (Programmable Logic Controllers), motor drives, and communication modules.

Detailed and Complete Alternative Models

1. LM317: A popular adjustable voltage regulator with similar characteristics and package options.
2. LT1084: Offers higher output current capability and lower dropout voltage compared to the SPX1587AR-L/TR.
3. LM1117: Provides fixed output voltage options with low dropout voltage and thermal shutdown protection.

These alternative models offer similar functionality and can be considered as substitutes for the SPX1587AR-L/TR based on specific requirements and application constraints.

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