MIC2951-3.3BMM

Product Overview

Category

MIC2951-3.3BMM belongs to the category of voltage regulators.

Use

It is commonly used to regulate and stabilize voltage in electronic circuits.

Characteristics

• Input Voltage Range: 4V to 26V
• Output Voltage: 3.3V
• Maximum Output Current: 500mA
• Low Dropout Voltage: 380mV at 500mA
• Low Quiescent Current: 120µA
• Thermal Shutdown Protection
• Short Circuit Protection

Package

MIC2951-3.3BMM is available in a miniature SOT-23 package.

Essence

The essence of MIC2951-3.3BMM is its ability to provide a stable and regulated output voltage of 3.3V, even when the input voltage varies.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 3000 units per reel/tube.

Specifications

• Input Voltage Range: 4V to 26V
• Output Voltage: 3.3V ±2%
• Output Current: Up to 500mA
• Dropout Voltage: 380mV at 500mA
• Quiescent Current: 120µA
• Operating Temperature Range: -40°C to +125°C
• Package Type: SOT-23

Detailed Pin Configuration

MIC2951-3.3BMM has the following pin configuration:

1. GND (Ground)
2. VIN (Input Voltage)
3. VOUT (Output Voltage)

Functional Features

• Voltage Regulation: MIC2951-3.3BMM ensures a stable output voltage of 3.3V, regardless of variations in the input voltage.
• Low Dropout Voltage: The regulator maintains a low dropout voltage of 380mV at 500mA, minimizing power dissipation.
• Thermal Shutdown Protection: It incorporates thermal shutdown protection to prevent damage due to excessive temperature.
• Short Circuit Protection: The device is equipped with short circuit protection, safeguarding the regulator and the connected circuitry.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• Low quiescent current minimizes power consumption.
• Small package size enables space-saving designs.
• Thermal shutdown and short circuit protection enhance reliability.

Disadvantages

• Maximum output current limited to 500mA, which may not be sufficient for high-power applications.
• Output voltage fixed at 3.3V, limiting flexibility in certain scenarios.

Working Principles

MIC2951-3.3BMM utilizes a combination of internal circuitry, including a voltage reference, error amplifier, and pass transistor, to regulate the output voltage. The voltage reference sets the desired output voltage, while the error amplifier compares the actual output voltage with the reference. Any deviation is corrected by adjusting the pass transistor, ensuring a stable output voltage.

Detailed Application Field Plans

MIC2951-3.3BMM finds applications in various electronic systems, including but not limited to:

1. Battery-powered devices: Provides a regulated voltage for microcontrollers, sensors, and other components in portable electronics.
2. Automotive electronics: Ensures stable voltage supply for automotive control units, infotainment systems, and lighting modules.
3. Industrial automation: Used in PLCs (Programmable Logic Controllers), motor control circuits, and sensor interfaces.
4. Communication systems: Regulates voltage in wireless routers, modems, and network switches.
5. Consumer electronics: Enables stable voltage for audio/video equipment, gaming consoles, and smart home devices.

Detailed and Complete Alternative Models

1. LM1117-3.3: Similar voltage regulator with a fixed 3.3V output and higher maximum current rating of 800mA.
2. LT1763-3.3: Low dropout voltage regulator with a fixed 3.3V output and a maximum current rating of 500mA.
3. TPS79633: High-performance voltage regulator with a fixed 3.3V output, low dropout voltage, and a maximum current rating of 1A.

These alternative models offer similar functionality to MIC2951-3.3BMM and can be considered based on specific application requirements.

In conclusion, MIC2951-3.3BMM is a voltage regulator that provides stable and regulated 3.3V output voltage. It offers advantages such as a wide input voltage range, low quiescent current, and thermal and short circuit protection. However, it has limitations in terms of maximum output current and fixed output voltage. This device finds applications in various fields, including battery-powered devices, automotive electronics, industrial automation, communication systems, and consumer electronics. Alternative models like LM1117-3.3, LT1763-3.