MIC39151-1.8WT

Product Overview

Category

MIC39151-1.8WT belongs to the category of voltage regulators.

Use

This product is used to regulate and stabilize voltage levels in electronic circuits.

Characteristics

• Input Voltage Range: 2.5V to 16V
• Output Voltage: 1.8V
• Maximum Output Current: 500mA
• Low Dropout Voltage: 120mV at 500mA
• Low Quiescent Current: 85µA
• Thermal Shutdown Protection
• Short Circuit Current Limiting
• Available in SOT-223 Package

Package

MIC39151-1.8WT is available in a SOT-223 package, which provides thermal resistance and mechanical protection.

Essence

The essence of MIC39151-1.8WT lies in its ability to provide a stable output voltage despite variations in input voltage and load conditions.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage: 1.8V
• Output Current: Up to 500mA
• Dropout Voltage: 120mV at 500mA
• Quiescent Current: 85µA
• Operating Temperature Range: -40°C to +125°C
• Thermal Resistance: 50°C/W (junction to ambient)
• Package Type: SOT-223

Detailed Pin Configuration

MIC39151-1.8WT has the following pin configuration:

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

Functional Features

• Voltage Regulation: MIC39151-1.8WT ensures a stable output voltage of 1.8V, regardless of input voltage fluctuations.
• Low Dropout Voltage: With a dropout voltage as low as 120mV at 500mA, this regulator minimizes power dissipation and improves efficiency.
• Thermal Shutdown Protection: The device incorporates thermal shutdown protection to prevent damage due to excessive temperature.
• Short Circuit Current Limiting: MIC39151-1.8WT includes short circuit current limiting to protect the circuit from excessive current flow.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• Low dropout voltage reduces power dissipation and improves efficiency.
• Thermal shutdown protection ensures safe operation under high-temperature conditions.
• Short circuit current limiting protects the circuit from damage.

Disadvantages

• Limited output current capacity (up to 500mA).
• SOT-223 package may require additional space on the PCB.

Working Principles

MIC39151-1.8WT 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 stable output voltage of 1.8V. The device regulates the voltage by controlling the flow of current through a pass transistor, which drops the excess voltage across it to maintain the desired output voltage.

Detailed Application Field Plans

MIC39151-1.8WT finds applications in various electronic systems that require a stable 1.8V voltage supply. Some common application fields include:

1. Mobile Devices: Powering low-voltage components such as processors, memory modules, and sensors.
2. Automotive Electronics: Providing a regulated voltage for microcontrollers, sensors, and communication modules.
3. Industrial Control Systems: Supplying stable voltage to control circuits, sensors, and actuators.
4. IoT Devices: Powering low-power wireless modules, sensors, and microcontrollers.
5. Consumer Electronics: Regulating voltage for audio/video systems, gaming consoles, and portable devices.

Detailed and Complete Alternative Models

1. LM1117-1.8: A popular alternative with similar specifications and a TO-220 package.
2. LT1763-1.8: Offers lower dropout voltage and higher output current capacity in a SOT-223 package.
3. TPS79618: Provides a fixed 1.8V output voltage with low dropout voltage and high PSRR.

These alternative models offer similar functionality and can be considered based on specific application requirements.

In conclusion, MIC39151-1.8WT is a voltage regulator that provides stable 1.8V output voltage, low dropout voltage, and thermal protection. It finds applications in various electronic systems, including mobile devices, automotive electronics, industrial control systems, IoT devices, and consumer electronics. Alternative models such as LM1117-1.8, LT1763-1.8, and TPS79618 offer similar functionality and can be used as substitutes.