MIC2937A-3.3BU

Product Overview

Category

The MIC2937A-3.3BU belongs to the category of voltage regulators.

Use

This product is commonly used in electronic circuits to regulate and stabilize the output voltage.

Characteristics

• Voltage regulation: The MIC2937A-3.3BU provides a fixed output voltage of 3.3V.
• High current capability: It can handle a maximum output current of up to 1.5A.
• Low dropout voltage: The device has a low dropout voltage, ensuring efficient power conversion.
• Thermal shutdown protection: It includes built-in thermal shutdown protection to prevent overheating.

Package

The MIC2937A-3.3BU comes in a compact TO-263 package, which allows for easy integration into various circuit designs.

Essence

The essence of the MIC2937A-3.3BU lies in its ability to provide a stable and regulated output voltage, making it suitable for applications requiring precise voltage control.

Packaging/Quantity

This product is typically available in reels or tubes, with a standard quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 26V
• Output Voltage: 3.3V
• Maximum Output Current: 1.5A
• Dropout Voltage: 350mV (typical)
• Quiescent Current: 120µA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MIC2937A-3.3BU features a 5-pin configuration:

1. VIN (Input Voltage): Connects to the input voltage source.
2. GND (Ground): Common ground reference.
3. VOUT (Output Voltage): Provides the regulated output voltage.
4. ADJ (Adjust): Allows for fine-tuning of the output voltage if required.
5. NC (No Connection): This pin is not connected and should be left unconnected.

Functional Features

• Voltage Regulation: The MIC2937A-3.3BU maintains a stable output voltage of 3.3V, even with varying input voltages.
• Current Limiting: It incorporates current limiting circuitry to protect against excessive current draw.
• Thermal Shutdown Protection: The device includes thermal shutdown protection, which activates when the temperature exceeds a safe threshold.
• Short Circuit Protection: It offers short circuit protection to prevent damage in case of a short circuit condition.

Advantages and Disadvantages

Advantages

• High current capability allows for powering a wide range of electronic components.
• Low dropout voltage ensures efficient power conversion.
• Compact package size enables easy integration into various circuit designs.
• Built-in thermal shutdown protection enhances reliability.

Disadvantages

• Fixed output voltage may limit its use in applications requiring variable voltage outputs.
• Limited availability of alternative models with different output voltage options.

Working Principles

The MIC2937A-3.3BU operates based on a linear voltage regulation principle. It utilizes an internal voltage reference and feedback control mechanism to maintain a constant output voltage of 3.3V, regardless of variations in the input voltage. The device adjusts the pass transistor's resistance to regulate the output voltage and minimize the dropout voltage.

Detailed Application Field Plans

The MIC2937A-3.3BU finds application in various fields, including:

1. Power Supply Units: It can be used as a voltage regulator in power supply units to provide a stable 3.3V output for microcontrollers, sensors, and other electronic components.
2. Embedded Systems: The device is suitable for embedded systems that require a regulated power source for reliable operation.
3. Automotive Electronics: It can be employed in automotive electronics to regulate voltage for microcontrollers, sensors, and other critical components.
4. Industrial Control Systems: The MIC2937A-3.3BU is well-suited for industrial control systems that demand precise voltage regulation.

Detailed and Complete Alternative Models

While the MIC2937A-3.3BU is a popular choice for 3.3V voltage regulation, there are alternative models available with different output voltage options. Some notable alternatives include:

1. MIC2937A-5.0BU: Provides a fixed output voltage of 5.0V.
2. MIC2937A-ADJBU: Offers an adjustable output voltage range through an external resistor network.

These alternative models cater to specific voltage requirements beyond the standard 3.3V output.

In conclusion, the MIC2937A-3.3BU is a voltage regulator that provides a stable 3.3V output voltage with high current capability. Its compact package, thermal shutdown protection, and low dropout voltage make it suitable for various applications in different fields. While it has fixed output voltage limitations, alternative models offer flexibility in voltage selection.