MIC4576WT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High efficiency, low dropout voltage, adjustable output voltage
• Package: TO-220
• Essence: Linear regulator with current limit and thermal shutdown protection
• Packaging/Quantity: Tube packaging, 50 units per tube

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.25V to 37V
• Dropout Voltage: 0.45V at 1A load current
• Maximum Output Current: 3A
• Line Regulation: 0.02% typical
• Load Regulation: 0.04% typical
• Quiescent Current: 10mA typical
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

MIC4576WT follows the standard pin configuration for TO-220 packages:

1. VIN: Input voltage pin
2. GND: Ground pin
3. ADJ: Adjustable pin for setting the output voltage
4. VOUT: Output voltage pin

Functional Features

• High efficiency: The MIC4576WT offers high efficiency due to its low dropout voltage and low quiescent current.
• Adjustable output voltage: The ADJ pin allows users to set the desired output voltage within the specified range.
• Current limit protection: The IC incorporates a current limit feature to protect against excessive load currents.
• Thermal shutdown protection: The MIC4576WT includes thermal shutdown circuitry to prevent overheating.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications. - Adjustable output voltage provides flexibility in various scenarios. - High efficiency ensures minimal power loss. - Current limit and thermal shutdown protection enhance reliability.

Disadvantages: - Limited maximum output current of 3A may not be suitable for high-power applications. - TO-220 package may require additional heat sinking for efficient thermal management.

Working Principles

The MIC4576WT is a linear voltage regulator that operates by maintaining a constant output voltage despite variations in input voltage and load conditions. It achieves this through a pass transistor that adjusts its resistance to regulate the output voltage. The adjustable pin (ADJ) allows users to set the desired output voltage, which is then maintained by the internal circuitry.

Detailed Application Field Plans

The MIC4576WT finds applications in various fields, including:

1. Power supplies: It can be used as a voltage regulator in power supply circuits for electronic devices, ensuring stable and regulated power delivery.
2. Automotive electronics: The IC's wide input voltage range and robust protection features make it suitable for automotive applications, such as powering sensors and control modules.
3. Industrial equipment: The MIC4576WT can be utilized in industrial machinery and equipment to provide reliable and regulated power for control systems and sensors.
4. Telecommunications: It finds use in telecommunications equipment, such as routers and switches, to maintain stable power supply voltages.

Detailed and Complete Alternative Models

Some alternative models to the MIC4576WT include:

1. LM317: A popular adjustable linear voltage regulator with similar characteristics and pin configuration.
2. LT1085: A high-current linear voltage regulator with adjustable output voltage and low dropout voltage.
3. LM7805: A fixed-output linear voltage regulator with a 5V output voltage, commonly used in low-power applications.

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

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