MIC2940A-12WU

Product Overview

Category

The MIC2940A-12WU belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• High accuracy and low dropout voltage
• Low quiescent current
• Thermal shutdown protection
• Short-circuit current limiting

Package

The MIC2940A-12WU comes in a TO-263 package.

Essence

This voltage regulator is designed to provide a stable output voltage even when the input voltage varies.

Packaging/Quantity

The MIC2940A-12WU is typically packaged in reels or tubes, with a quantity of 1000 units per reel/tube.

Specifications

• Input Voltage Range: 6V to 26V
• Output Voltage: 12V
• Output Current: Up to 1A
• Dropout Voltage: 0.5V (typical)
• Quiescent Current: 75µA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MIC2940A-12WU has three pins:

1. Pin 1 (VIN): This pin is used to connect the input voltage.
2. Pin 2 (GND): This pin is connected to the ground.
3. Pin 3 (VOUT): This pin provides the regulated output voltage.

Functional Features

• High accuracy: The MIC2940A-12WU ensures precise regulation of the output voltage.
• Low dropout voltage: It maintains a stable output voltage even when the input voltage is close to the desired output voltage.
• Thermal shutdown protection: The regulator shuts down if the temperature exceeds a safe limit, preventing damage.
• Short-circuit current limiting: It protects the circuit from excessive current in case of a short circuit.

Advantages and Disadvantages

Advantages

• High accuracy ensures reliable voltage regulation.
• Low dropout voltage allows for efficient power conversion.
• Thermal shutdown protection prevents overheating and damage.
• Short-circuit current limiting protects the circuit from damage.

Disadvantages

• Limited output current capacity (up to 1A).
• Requires an input voltage within the specified range.

Working Principles

The MIC2940A-12WU operates by comparing the output voltage with a reference voltage. It adjusts the internal circuitry to maintain a stable output voltage, even when the input voltage varies. The regulator uses feedback control to continuously monitor and adjust the output voltage.

Detailed Application Field Plans

The MIC2940A-12WU is commonly used in various applications, including:

1. Power supply circuits: It provides regulated voltage for microcontrollers, sensors, and other electronic components.
2. Automotive electronics: It ensures stable voltage supply for automotive systems, such as infotainment systems and engine control units.
3. Industrial automation: It is used in control systems, motor drives, and other industrial equipment that require precise voltage regulation.
4. Telecommunications: It finds application in telecom infrastructure, providing stable voltage for communication devices.

Detailed and Complete Alternative Models

Some alternative models to the MIC2940A-12WU include:

1. LM317: A popular adjustable voltage regulator with similar characteristics.
2. LT1086: Another fixed voltage regulator with high accuracy and low dropout voltage.
3. LM1117: A low dropout voltage regulator available in various fixed output voltages.

These alternative models offer similar functionality and can be used as substitutes depending on specific requirements.

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