MIC29201-12WT

Introduction

The MIC29201-12WT is a positive, adjustable, low-dropout (LDO) linear regulator capable of providing up to 250mA of continuous output current with an extremely low 100mV dropout voltage at +12V output. Its low dropout voltage and excellent transient response characteristics make it well-suited for computing, communication systems, and other systems that require a clean, reliable source of power.

Features

• Wide input voltage range: 2.7V to 25V
• Selectable output voltage range: +2.5V to +13.2V
• Efficient and low-quiescent current operation
• Fast Transient Response
• Low Dropout Voltage
• Output Over-Voltage Protection

Applications

• Computing systems
• Communications systems
• Networking systems
• Industrial systems
• Aeronautical and automotive systems

Working Principle

The MIC29201-12WT works by passing an input voltage, typically from a battery, through a linear circuit consisting of an N-channel MOSFET, a resistor, and an error amplifier. The resistor lowers the input voltage by a certain amount and the error amplifier monitors the output voltage and signals to the MOSFET to increase or decrease the resistance to maintain the desired output voltage. The input voltage, combined with the adjusted resistor value, determines the output voltage. An over-voltage protection circuit is used to protect the device from output voltages that exceed 4.0V.

The MIC29201-12WT also features a fast transient response with a frequency compensated control loop, providing a stable output during line and load changes. The device utilizes a precision internal reference, and has a current limit shaped soft-start circuit that prevents momentary peaks in converter output during start-up.

Conclusion

The MIC29201-12WT is a low-dropout linear regulator designed for computing, communications, networking, industrial, and other systems that require a clean and efficient source of power. It has an adjustable output voltage range from 2.5V to 13.2V, a wide input voltage range from 2.7V to 25V, and an over-voltage protection circuit. It also features a fast transient response with a frequency compensated control loop and a current limit shaped soft-start circuit. This makes it well-suited for a variety of applications.