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PMIC – Voltage Regulators – Linear

The ISL9012IRMMZ is an integrated MOSFET linear regulator designed for use in power management applications. It provides an extremely low quiescent current and low dropout voltage, making it ideal for battery-powered applications.

Overview

The ISL9012IRMMZ is a low-quiescent linear regulator featuring an integrated high-side MOSFET. Its low-dropout, low-noise operation ensures long battery life by minimizing power dissipation, and its adjustable output voltage capability can provide a wide range of solutions for adjustable voltage requirements. The external enable control allows the user to control the regulator’s output voltage, so it can be used in applications requiring precision, such as battery-charged systems and microprocessor-controlled power supplies. The ISL9012IRMMZ is available in a 6-pin SOT-23 package.

Applications

The ISL9012IRMMZ is ideal for applications that require an adjustable output voltage, such as battery-charged systems, microcontroller and processor-controlled power supplies, and digital-to-analog converter (DAC) power supplies. It is also suitable for use in applications requiring low quiescent current for long battery life and low dropout voltage for maximum performance.

Working Principle

The ISL9012IRMMZ works by connecting the high-side MOSFET with the low-side load and then regulating the voltage across the load. The voltage across the load is sensed by an integrated voltage divider, which is then compared to a reference voltage. The comparison is used to adjust the gate driver for the MOSFET, so the current can be adjusted to regulate the voltage at the load. This is done by adjusting the gate voltage, which in turn determines the resistance of the MOSFET, which in turn determines the current across the load. The enable input allows the user to control the output voltage by either connecting the logic pin to a low voltage source or using an external signal such as a microcontroller or processor.

Conclusion

The ISL9012IRMMZ is an ideal choice for applications that require an adjustable output voltage. Its low quiescent current and low dropout voltage mean it can be used in battery-powered applications, digital-to-analog converter power supplies, and microprocessor-controlled power supplies. Its enable control allows the user to control the output voltage, making it a great choice for applications that require precision.

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