LM9071SX

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LM9071SX Application Field and Working Principle

The LM9071SX is a high-performance, low-dropout linear voltage regulator from Texas Instruments. It has an adjustable output voltage range from 0.25V to 20V, allowing high-accuracy precision adjustable voltage regulation. It has several features which make it an ideal regulator for many applications. It has low noise and low quiescent current for excellent power efficiency, high power supply rejection ratio (PSRR) and low temperature coefficient of output. It operates over a temperature range of -40C to +85C and includes a built-in power-on reset to enable stable system start-up.

Features of LM9071SX

• Low dropout voltage.
• High-accuracy, adjustable output voltage from 0.25V to 20V.
• Low quiescent current.
• Low output noise.
• High power supply rejection ratio (PSRR).
• Low temperature coefficient of output.
• Operates over temperature range of -40C to +85C.
• Built-in power-on reset.

Applications of LM9071SX

The LM9071SX is ideal for many applications, making it an extremely versatile device. It is used widely in consumer electronics and automotive electronics, such as battery-powered consumer products, laptop computers, automotive infotainment systems, automotive instrumentation, and instrumentation systems. The adjustable output voltage range and low dropout voltage make it perfect for use as a voltage regulator and power management IC in many different applications.

Working Principle of LM9071SX

The LM9071SX is an adjustable linear voltage regulator. The device operates by passing a reference voltage through an internal amplifier-assisted pass transistor. The reference voltage is generated by an internal voltage divider and is adjusted by an external control voltage. The amplified output voltage is then compared to the reference voltage to adjust the output voltage. The amplifier is designed to maintain tight regulation of the output voltage, even when the load current and line voltage variations. In addition, the device is designed to have low noise, low quiescent current and high PSRR.

The LM9071SX also includes a built-in power-on reset (POR) circuit that monitors the input power supply voltage. When the voltage drops below a predetermined threshold, the POR circuit will assert a reset signal to the output, forcing it to a low state and keeping the system powered on until the input voltage is restored. The reset threshold is adjustable with an external resistor.

Conclusion

The LM9071SX is an adjustable linear voltage regulator from Texas Instruments. It has a wide adjustable output voltage range from 0.25V to 20V, low noise and low quiescent current for excellent power efficiency, and a high power supply rejection ratio. It includes several features, such as a built-in power-on reset, which make it an ideal regulator for many applications. It is used widely in consumer electronics and automotive electronics, such as battery-powered consumer products, laptop computers and automotive infotainment systems.

The device operates by passing a reference voltage through an internal amplifier-assisted pass transistor and comparing the output voltage to the reference voltage to adjust the output. It also includes a built-in power-on reset circuit which monitors the input power supply voltage and asserts a reset signal to the output when the voltage drops below a predetermined threshold.

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