MIC29150-12WU

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This paper introduces the application field and working principle MIC29150-12WU, a dual-channel low dropout (LDO) regulator, which belongs to the voltage regulator family of PMICs.

Overview of MIC29150-12WU

The dual-channel MIC29150-12WU is designed to provide two output voltage channels with the benefits of a wide channel-to-channel variation. It provides constant output voltages of 12 V and 5 V with an input voltage range of 5 V to 14 V, ideal for many general-purpose applications. Both output channels have integrated current-limiting protection and thermal shutdown protection. Additionally, the dropout voltage is low enough to operate small loads with a minimum input voltage of 5 V and very low quiescent current.

Applications of the MIC29150-12WU

The MIC29150-12WU is suitable for a variety of applications, including general benchtop equipment, automotive, motor-driven applications and RF communication systems. Examples of applications include battery-powered products, such as laptop and tablet PCs and other consumer-oriented products, as well as HVAC systems, medical instruments, and so forth.

Working Principle of the MIC29150-12WU

The MIC29150-12WU uses two independent linear voltage regulators to create a regulated supply. The 12 V regulator is built around a P-channel metal-oxide-semiconductor field-effect transistor (PMOSFET), while the 5 V regulator is built around an N-channel metal-oxide-semiconductor field-effect transistor (NMOSFET). As a result, it is able to regulate both positive and negative voltages. Both the PMOSFET and NMOSFET convert the input voltage into output voltage through the linear regulator principle, which is also known as a voltage reference-based approach.

The regulator\'s PMOSFET uses a PMOSFET transistor as its active element, while the NMOSFET does the same but with an NMOSFET transistor. The PMOSFET works by allowing current to pass through when the drain voltage is equal to or higher than the gate voltage, while the NMOSFET works by allowing current to pass through when the gate voltage is equal to or lower than the drain voltage.

The MIC29150-12WU also features an adjustable voltage divider, which is used to adjust the output voltage. The voltage divider is made with a series of resistors, which reduce the output voltage of the linear regulator to the desired level. To further regulate the output voltage, a bypass capacitor is used to provide the necessary loop-circuit for stabilizing the output voltage, and an error amplifier is used to adjust the capacitor\'s value.

Conclusion

In conclusion, the MIC29150-12WU is a dual-channel low dropout (LDO) regulator which is designed for a variety of applications. It uses two linear voltage regulators to generate a regulated voltage, and features a voltage divider, bypass capacitor, and error amplifier for further stability.

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