MIC37151-3.3WR-TR

Product Overview

Category

The MIC37151-3.3WR-TR belongs to the category of voltage regulators.

Use

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

Characteristics

• Voltage regulation: The MIC37151-3.3WR-TR provides a stable output voltage of 3.3V.
• High efficiency: This voltage regulator offers high efficiency, minimizing power loss during operation.
• Low dropout voltage: The device has a low dropout voltage, ensuring reliable performance even when the input voltage is close to the desired output voltage.
• Thermal shutdown protection: It includes thermal shutdown protection to prevent damage due to excessive heat.
• Small package size: The MIC37151-3.3WR-TR comes in a compact package, making it suitable for space-constrained applications.

Package and Quantity

This product is available in a small outline SOT-223 package. It is typically sold in reels or tubes containing a specified quantity, such as 2500 units per reel.

Specifications

• Input voltage range: 4.5V to 20V
• Output voltage: 3.3V
• Maximum output current: 1.5A
• Dropout voltage: 300mV at 1A load
• Line regulation: ±0.2%
• Load regulation: ±0.4%
• Quiescent current: 120µA (typical)
• Operating temperature range: -40°C to +125°C

Pin Configuration

The MIC37151-3.3WR-TR has the following pin configuration:

```

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| | --| VIN GND|-- --| VOUT EN |-- |___________| ```

• VIN: Input voltage pin
• GND: Ground pin
• VOUT: Output voltage pin
• EN: Enable pin (active high)

Functional Features

1. Voltage regulation: The MIC37151-3.3WR-TR ensures a stable output voltage of 3.3V, regardless of input voltage fluctuations.
2. Thermal shutdown protection: It includes built-in thermal shutdown protection to prevent overheating and potential damage to the device.
3. Low dropout voltage: The low dropout voltage allows the regulator to maintain a stable output even when the input voltage is close to the desired output voltage.
4. High efficiency: This voltage regulator offers high efficiency, reducing power dissipation and maximizing energy utilization.

Advantages and Disadvantages

Advantages

• Stable output voltage
• Compact package size
• High efficiency
• Thermal shutdown protection

Disadvantages

• Limited maximum output current (1.5A)
• Dropout voltage may affect performance in low input voltage scenarios

Working Principles

The MIC37151-3.3WR-TR operates based on the principle of linear voltage regulation. It uses a feedback mechanism to compare the output voltage with a reference voltage and adjusts the internal circuitry to maintain a constant output voltage of 3.3V. The enable pin allows the user to control the regulator's operation by enabling or disabling the output.

Detailed Application Field Plans

The MIC37151-3.3WR-TR finds applications in various electronic systems that require a stable 3.3V power supply. Some common application fields include:

1. Microcontrollers: Providing a regulated voltage for microcontrollers, ensuring reliable operation.
2. Communication devices: Powering communication modules, such as Wi-Fi or Bluetooth modules, with a stable voltage.
3. Industrial automation: Supplying power to sensors, actuators, and control circuits in industrial automation systems.
4. Automotive electronics: Regulating voltage for automotive components like infotainment systems, navigation units, and engine control modules.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and pin configuration.
2. LT1763-3.3: Another alternative offering low dropout voltage and high output current capability.
3. TPS79633: An alternative model with excellent line and load regulation characteristics.

These alternative models can be considered based on specific requirements and availability in the market.

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