MIC2951-4.85BM-TR

Product Overview

Category

The MIC2951-4.85BM-TR belongs to the category of voltage regulators.

Use

This product is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 6V to 26V
• Output Voltage: 4.85V
• Maximum Output Current: 500mA
• Dropout Voltage: 0.5V (typical)
• Low Quiescent Current: 120µA (typical)
• Thermal Shutdown Protection
• Short Circuit Current Limiting
• Available in SOT-223 Package

Package

The MIC2951-4.85BM-TR is available in a SOT-223 package, which provides excellent thermal performance and ease of mounting.

Essence

The essence of the MIC2951-4.85BM-TR is its ability to regulate voltage with high efficiency and low quiescent current consumption.

Packaging/Quantity

This product is typically packaged in reels or tubes, containing a specific quantity per package. Please refer to the manufacturer's datasheet for detailed packaging information.

Specifications

• Input Voltage Range: 6V to 26V
• Output Voltage: 4.85V
• Output Current: Up to 500mA
• Dropout Voltage: 0.5V (typical)
• Quiescent Current: 120µA (typical)
• Operating Temperature Range: -40°C to +125°C
• Thermal Resistance: 50°C/W (junction-to-ambient)

Pin Configuration

The MIC2951-4.85BM-TR has the following pin configuration:

```

---

| | --| VIN GND |-- --| VOUT ADJ |-- |___________| ```

• VIN: Input Voltage
• GND: Ground
• VOUT: Output Voltage
• ADJ: Adjustable Pin (used to set the output voltage)

Functional Features

1. Voltage Regulation: The MIC2951-4.85BM-TR provides a stable output voltage of 4.85V, regardless of input voltage fluctuations.
2. Low Quiescent Current: With a low quiescent current of only 120µA, this regulator minimizes power consumption in standby or idle modes.
3. Thermal Shutdown Protection: The device incorporates thermal shutdown protection, which prevents damage due to excessive temperature.
4. Short Circuit Current Limiting: The regulator includes short circuit current limiting to protect against overcurrent conditions.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for flexibility in various applications.
• Low quiescent current reduces power consumption and extends battery life.
• Thermal shutdown protection ensures reliable operation even under high temperature conditions.
• Short circuit current limiting protects the regulator and connected components from damage.

Disadvantages

• Limited maximum output current of 500mA may not be suitable for high-power applications.
• Dropout voltage of 0.5V may result in reduced efficiency in certain scenarios.

Working Principles

The MIC2951-4.85BM-TR is a linear voltage regulator that utilizes a feedback mechanism to maintain a constant output voltage. It compares the output voltage with a reference voltage and adjusts the internal pass transistor accordingly to regulate the output voltage at the desired level. The device operates by dissipating excess voltage as heat, resulting in a dropout voltage of 0.5V.

Detailed Application Field Plans

The MIC2951-4.85BM-TR can be used in various applications where a stable and regulated voltage supply is required. Some potential application fields include:

1. Battery-Powered Devices: This regulator can be used in portable electronic devices, such as smartphones, tablets, and wearable devices, to ensure a stable power supply from the battery.
2. Embedded Systems: It is suitable for powering microcontrollers, sensors, and other components in embedded systems, providing reliable voltage regulation.
3. Automotive Electronics: The regulator can be employed in automotive applications, such as infotainment systems, dashboard displays, and lighting control circuits, to maintain stable voltage levels.
4. Industrial Control Systems: It finds application in industrial control systems, where precise and regulated voltage is crucial for the proper functioning of various components.

Detailed and Complete Alternative Models

1. LM1117-4.85: A popular alternative with similar specifications and pin configuration.
2. LT1085CT-4.85: Another alternative offering higher output current capability.
3. TPS7A4901-4.85: An alternative with lower dropout voltage and higher efficiency.

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

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