MIC29312BU

MIC29312BU Voltage Regulator

Introduction

The MIC29312BU are low-dropout, positive-voltage, three-terminal regulators that can provide a low-impedance voltage source with the output voltage accurately set by the external resistors. The MIC29312BU are available in 0.8V to 17V output voltage range and absolute maximum input voltage up to 20V. This device is mainly used as an additional power source for systems having multiple power-supply requirements. Its adjustable output, wide input voltage range and low dropout voltage make it perfect for space-constrained designs such as portable and handheld devices.

Features

• Low-Dropout Voltage Density
• Nominal Dropout Voltage: 200mV
• Output Range: 0.8V to 17V
• Extremely Low Quiescent Current Consumption
• High Load and Line Transient Response
• Adjustable Output via External Resistors
• High Accuracy
• Extremely Low Output Noise
• Wide Input Voltage Range: Up to 20V
• High Output Current Saturation
• Extremely Fast Reverse Voltage/Current Response
• Precise Voltage Regulation

Application

The MIC29312BU voltage regulator is typically used in system designs that require several different power supply voltages in the same system, such as portable or handheld devices which have multiple power supply requirements. It is also ideal for space-constrained designs, and its high accuracy, wide input voltage range and low dropout voltage make it suitable for any type of application requiring high reliability and precision voltage-regulating functions.

Working Principle

The MIC29312BU voltage regulator operates on the principle of controlling the gate of a pass gate MOSFET in order to regulate the output voltage. The voltage divider formed by the external resistors R1 and R2 sets the output voltage of the regulator. The output voltage of the regulator is determined by the following expression:

Vout = Vref*[(R1/(R1+R2)) + 1]

Where Vref is the reference voltage of the regulator and R1 and R2 are the external resistors.

The regulator adjusts the gate voltage of the pass MOSFET such that the output voltage is always equal to the reference voltage. This ensures that the output voltage remains constant even when the load or line voltage changes. The MIC29312BU has a low quiescent current consumption and low temperature coefficient, making it ideal for applications requiring high accuracy and reliability.

Conclusion

The MIC29312BU is a low-dropout, positive-voltage, three-terminal regulator that can provide a low-impedance voltage source with the output voltage accurately set by external resistors. It has a wide input voltage range that can handle up to 20V and an output voltage range of 0.8V to 17V. This regulator is mainly used in portable or handheld devices requiring multiple power supply voltages due to its low dropout voltage and extreme low output noise. The MIC29312BU operates primarily on the principle of controlling the gate of a pass gate MOSFET in order to regulate the output voltage.