MIC69151-1.8YME-TR

Introduction

The MIC69151-1.8YME-TR is a linear voltage regulator with built-in over-voltage protection circuitry, designed for applications requiring a low dropout linear regulator with a minimum of external components. This versatile device provides a positive voltage regulation with either fixed or adjustable output voltage control, and also provides a low dropout voltage, high power efficiency and low quiescent current. It is suitable for use in commercial and industrial applications, as well as for automotive applications.

Features

• Input voltage range: 4.5V to 6V
• Output voltage range: 1.25V to 5.5V
• Low Dropout Voltage: 150mV
• High Power Efficiency: 93.3%
• Low Quiescent Current: 300µA
• Built-in Over-Voltage Protection
• Fixed or adjustable output voltage control
• Suitable for automotive applications
• Thermal shut-down protection
• Under-voltage protection and short circuit protection

Applications

The MIC69151-1.8YME-TR is suitable for a wide range of applications, such as:

• Power Supply/Battery Charger
• Consumer Electronics
• Automotive Applications
• Industrial Applications

Working Principle

The MIC69151-1.8YME-TR is a linear voltage regulator that operates on the principle of linear regulation. In this method, the output voltage is regulated and maintained at a constant level by the use of an error amplifier, which compares the output voltage to a reference voltage. The error amplifier output controls an internally connected P-channel MOSFET, which is used to regulate the output voltage. The P-channel MOSFET is connected in a standard linear regulator configuration, and its gate voltage is used to control the amount of current that flows through the power transistor.

The current through the power transistor is limited by the load current, and the voltage is regulated by comparing the output voltage to a reference voltage. The voltage is adjusted by varying the gate voltage of the P-channel MOSFET, and the output voltage is maintained within the specified operating range. The MIC69151-1.8YME-TR is also built with over-voltage protection circuitry to ensure that the output voltage does not exceed the specified operating limit.

Conclusion

The MIC69151-1.8YME-TR is a versatile and reliable linear voltage regulator, suitable for a wide range of applications. It features an adjustable output voltage range of 1.25V to 5.5V, low dropout voltage, high power efficiency and low quiescent current, making it a perfect choice for power supply, consumer electronics, automotive and industrial applications. This device also incorporates various protection features such as over-voltage protection, short circuit protection and thermal shut-down protection to ensure reliable operations.