MIC2172YM

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Low dropout voltage - Adjustable output voltage - Current limiting and thermal shutdown protection

Package: SOIC (Small Outline Integrated Circuit)

Essence: The MIC2172YM is a voltage regulator IC that provides a stable output voltage with high efficiency and low dropout voltage.

Packaging/Quantity: The MIC2172YM is available in a standard SOIC package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 16V
• Output Voltage Range: 1.25V to 13.5V
• Maximum Output Current: 1A
• Dropout Voltage: 300mV at 1A
• Quiescent Current: 120µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The MIC2172YM has the following pin configuration:

```

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| | --| VIN GND |-- Pin 1: Ground --| VOUT NC |-- Pin 2: No Connection --| ADJ FB |-- Pin 3: Feedback --| EN NC |-- Pin 4: No Connection --| NC NC |-- Pin 5: No Connection --| NC NC |-- Pin 6: No Connection --| NC NC |-- Pin 7: No Connection --| NC NC |-- Pin 8: No Connection |___________| ```

Functional Features

• High Efficiency: The MIC2172YM utilizes advanced circuitry to achieve high efficiency, minimizing power losses.
• Low Dropout Voltage: With a dropout voltage of only 300mV at 1A, the MIC2172YM can regulate the output voltage even when the input voltage is close to the desired output voltage.
• Adjustable Output Voltage: The output voltage can be adjusted using an external resistor divider connected to the feedback pin (FB).
• Current Limiting and Thermal Shutdown Protection: The IC incorporates current limiting and thermal shutdown protection mechanisms to prevent damage due to excessive current or temperature.

Advantages and Disadvantages

Advantages: - High efficiency operation - Low dropout voltage - Adjustable output voltage - Built-in protection features

Disadvantages: - Limited maximum output current (1A)

Working Principles

The MIC2172YM is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the feedback voltage (FB) with a reference voltage to control the pass transistor's conduction. By adjusting the resistance in the feedback network, the output voltage can be set to the desired value.

When the input voltage is higher than the desired output voltage, the pass transistor remains in the off state, resulting in no current flow. As the input voltage drops below the desired output voltage, the pass transistor starts conducting, allowing current to flow through it and maintain the output voltage at the desired level.

The IC also includes current limiting and thermal shutdown protection mechanisms. If the output current exceeds the specified limit or the temperature rises above a certain threshold, these protection features activate to prevent damage to the IC.

Detailed Application Field Plans

The MIC2172YM is commonly used in various applications where a stable and regulated voltage supply is required. Some typical application fields include:

1. Power Supplies: The IC can be used in power supply circuits to provide a regulated voltage for electronic devices.
2. Battery-Powered Systems: It is suitable for battery-powered systems where efficient power conversion is crucial to maximize battery life.
3. Automotive Electronics: The MIC2172YM can be employed in automotive electronics, such as infotainment systems or dashboard displays, to ensure stable voltage supply.
4. Industrial Control Systems: It finds applications in industrial control systems that require precise and reliable voltage regulation.

Detailed and Complete Alternative Models

1. LM317: A popular linear voltage regulator with adjustable output voltage and current limiting features.
2. LT1085: A high-current linear voltage regulator with low dropout voltage and adjustable output voltage.
3. LM1117: A low dropout voltage regulator available in various fixed output voltage options.

These alternative models offer similar functionality and can be considered as alternatives to the MIC2172YM depending on specific requirements and design constraints.

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