Introduction

The MIC5370-SKYMT-TR device is a low dropout linear voltage regulator designed for regulating output within 3V to 5V range. It has a fixed turn on voltage of 2.6V and a maximum dropout voltage of 530mV at 1A load. It is available in Surface Mount (SMT) and Through Hole (TH) packages, and has one enable pin for sequencing and shutdown.

Features

The MIC5370-SKYMT-TR comes with multiple features, such as:

• Wide input voltage range 3V to 5V
• Output voltage range adjustable from 2.6V to 5V
• Accuracy ±1%
• Low memory and low temperature coefficient
• Low dropout voltage of 0.53 V at 1A load
• Thermal shutdown status flag and overcurrent protection
• Ordering options of -MP (commercial) and -TR (automotive)

Application Field

The MIC5370-SKYMT-TR Voltage Regulator is suitable for a wide range of applications, such as computers, telecom, consumer electronics, networking, automotive, and medical devices. It is also appropriate for industrial, ATE, and aerospace applications.

Working Principles

The device uses a p-channel MOSFET as the main regulating element to generate the output voltage. This p-channel MOSFET is controlled by a control circuit, which regulates the gate voltage of the MOSFET to set and maintain the output voltage to a predetermined value. The control circuit is powered through the Out Enable and bias pins connected to the input voltage source.

The control circuit uses an error amplifier to compare the output voltage with a reference voltage. The reference voltage is provided by a voltage reference. If the output voltage is lower than the reference voltage, the error amplifier has a positive output, and the control transistor is enabled, which pulls the gate of the regulating MOSFET to increase the output voltage. If the output voltage is higher than the reference voltage, the error amplifier has a negative output, and the control transistor is disabled, which lowers the gate voltage of the regulating MOSFET to reduce the output voltage.

The MIC5370-SKYMT-TR also employs a number of functional blocks to ensure the regulator performs properly and safely in operation. These include an overcurrent protection (OCP) circuit, thermal shutdown (TSD) circuit, and thermal monitor circuit. The OCP circuit senses the current output and when this reaches the preset limit, it shuts off the output and shuts down the regulator until the output current drops below the trip point. The TSD circuit monitors the junction temperature and if it exceeds the predetermined temperature, it shuts off the regulator to protect it from thermal damage.

Conclusion

The MIC5370-SKYMT-TR is a linear voltage regulator providing high accuracy, low dropout voltage, and low temperature coefficient. It has a wide input voltage range and is suitable for a large number of applications. The device utilizes a p-channel MOSFET as the main regulating element and also includes a control circuit, error amplifier, and various protection circuits.