MIC2951-4.85BM

Product Overview

Category

The MIC2951-4.85BM 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
• Low Dropout Voltage: 0.5V (typical)
• Low Quiescent Current: 120µA (typical)
• Thermal Shutdown Protection
• Short Circuit Current Limiting
• Overtemperature Protection

Package

The MIC2951-4.85BM comes in a TO-263 package, also known as D2PAK or DDPAK.

Essence

The essence of this product lies in its ability to provide a stable and regulated output voltage despite variations in the input voltage.

Packaging/Quantity

The MIC2951-4.85BM 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: 4.85V
• Output Current: Up to 500mA
• Dropout Voltage: 0.5V (typical)
• Quiescent Current: 120µA (typical)
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-263 (D2PAK)
• Package Dimensions: 10.16mm x 9.91mm x 3.30mm

Detailed Pin Configuration

The MIC2951-4.85BM has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. VOUT (Output Voltage)
4. ADJ (Adjustment Pin)

Functional Features

• Voltage Regulation: The MIC2951-4.85BM provides a stable output voltage of 4.85V, regardless of variations in the input voltage.
• Low Dropout Voltage: With a low dropout voltage of 0.5V, this regulator can operate efficiently even when the input voltage is close to the desired output voltage.
• Low Quiescent Current: The device consumes only 120µA of current when in standby mode, minimizing power consumption.
• Thermal Shutdown Protection: In case of excessive temperature, the regulator shuts down to prevent damage.
• Short Circuit Current Limiting: The MIC2951-4.85BM has built-in protection against short circuits, limiting the current to protect the circuitry.
• Overtemperature Protection: The regulator includes overtemperature protection, ensuring safe operation even under high-temperature conditions.

Advantages and Disadvantages

Advantages

• Stable and regulated output voltage
• Low dropout voltage for efficient operation
• Low quiescent current for reduced power consumption
• Built-in thermal shutdown and short circuit protection
• Wide input voltage range for versatility

Disadvantages

• Limited maximum output current (500mA)
• Relatively large package size (TO-263)

Working Principles

The MIC2951-4.85BM is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant output voltage. The regulator operates by dissipating excess voltage as heat, which is why it has a dropout voltage.

Detailed Application Field Plans

The MIC2951-4.85BM finds applications in various electronic devices and systems, including but not limited to: - Power supplies - Battery-powered devices - Automotive electronics - Industrial control systems - Audio amplifiers - LED lighting systems

Detailed and Complete Alternative Models

1. LM1117-4.85: This is a similar voltage regulator with a fixed output voltage of 4.85V. It offers low dropout voltage and current limiting features.
2. LT1085CT-4.85: Another alternative, this regulator provides a fixed 4.85V output voltage with low dropout voltage and thermal shutdown protection.
3. TPS79650DRBR: This device offers a fixed 4.85V output voltage, low dropout voltage, and excellent line and load regulation.

These alternative models can be considered based on specific requirements and application needs.

In conclusion, the MIC2951-4.85BM is a voltage regulator that provides stable and regulated output voltage in various electronic applications. With its low dropout voltage, low quiescent current, and built-in protection features, it offers advantages for efficient and reliable circuit operation. However, it has limitations in terms of maximum output current and package size. Alternative models such as LM1117-4.85, LT1085CT-4.85, and TPS79650DR