SPX431LAN-L/TR

Product Overview

• Category: Integrated Circuit
• Use: Voltage Regulator
• Characteristics: Low Dropout, Adjustable Output, Low Quiescent Current
• Package: SOT-23-5
• Essence: Linear Voltage Regulator
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6.0V
• Output Voltage Range: 1.25V to 5.5V
• Output Current: Up to 150mA
• Dropout Voltage: 200mV (typical)
• Quiescent Current: 50µA (typical)
• Line Regulation: 0.05% (typical)
• Load Regulation: 0.1% (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SPX431LAN-L/TR is a 5-pin integrated circuit with the following pin configuration:

1. GND (Ground)
2. ADJ (Adjustment)
3. VOUT (Output Voltage)
4. VIN (Input Voltage)
5. NC (No Connection)

Functional Features

• Low dropout voltage ensures stable output even when input voltage is close to the desired output voltage.
• Adjustable output voltage allows for flexibility in various applications.
• Low quiescent current minimizes power consumption during standby or idle modes.
• Excellent line and load regulation characteristics ensure consistent performance under varying conditions.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables compatibility with different power sources.
• Adjustable output voltage provides versatility for various circuit requirements.
• Low dropout voltage ensures efficient power conversion.
• Low quiescent current prolongs battery life in portable devices.
• Compact SOT-23-5 package allows for space-saving designs.

Disadvantages

• Limited output current may not be suitable for high-power applications.
• Dropout voltage may cause a slight decrease in efficiency compared to switching regulators.
• Heat dissipation may be required for certain operating conditions due to linear regulation.

Working Principles

The SPX431LAN-L/TR is a linear voltage regulator that uses 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 dropout voltage is minimized by utilizing a low saturation voltage transistor.

Detailed Application Field Plans

The SPX431LAN-L/TR is commonly used in various electronic devices and systems, including:

1. Battery-powered devices: Portable audio players, handheld gaming consoles, and digital cameras.
2. Automotive electronics: Infotainment systems, navigation units, and dashboard displays.
3. Industrial control systems: PLCs (Programmable Logic Controllers), motor drives, and power supplies.
4. Communication equipment: Routers, switches, and wireless access points.
5. Consumer electronics: Smartphones, tablets, and wearable devices.

Detailed and Complete Alternative Models

1. LM1117-ADJ: Adjustable Linear Voltage Regulator, TO-220 package, 800mA output current.
2. LT1763-3.3: Fixed 3.3V Linear Voltage Regulator, SOT-223 package, 500mA output current.
3. MCP1700T-3302E/TT: Fixed 3.3V Low Quiescent Current Linear Voltage Regulator, SOT-23 package, 250mA output current.
4. TPS79633DCQR: Fixed 3.3V Ultra-Low Dropout Linear Voltage Regulator, VSON package, 1A output current.
5. XC6206P332MR: Fixed 3.3V Low Dropout Linear Voltage Regulator, SOT-23 package, 200mA output current.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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