SPX3819S-L

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The SPX3819S-L is a low quiescent current linear voltage regulator integrated circuit (IC) by EXAR. This PMIC is a two-terminal adjustable regulator for providing a regulated output voltage from a wide input voltage source. This device comes in the industry-standard SOIC-8 package. It is a low dropout (LDO) device with very low ground current and very low power dissipation.

SPX3819S-L Application Field

The SPX3819S-L is used in a wide range of applications, including battery-powered applications, automotive applications, and telecom applications. Its low power dissipation and very low ground current make it suitable for portable applications where current is a concern. It is also suitable for wireless applications where power efficiency is required.

It is suitable for powering microprocessors and other highly integrated circuits. It is also suited for powering automotive modules and accessories, providing constant DC voltage and excellent ripple rejection in a value-based solution. It is compatible with a wide range of operating temperature conditions, up to +125°C, making it suitable for applications in harsh environments.

SPX3819S-L Working Principle

SPX3819S-L is a low quiescent current linear voltage regulator integrated circuit (IC) which uses the advanced proprietary low quiescent current bias architecture. This device works by sensing and storing the input voltage (Vin) and then providing a programmed voltage (Vout) output from 0.8V to 10V with a voltage accuracy of ±3%.

The output voltage is regulated by varying the operating current of the bias network built into the SPX3819S-L IC. This enables the device to achieve a very low quiescent current, making it suitable for applications where power efficiency is important, such as in battery-powered applications. The SPX3819S-L also features shutdown input, allowing the regulator to be disabled when not in use, further improving power efficiency.

The SPX3819S-L also offers very low ground current and very low output noise, making it ideal for sensitive applications such as RF transceiver modules and microcontrollers. It also offers protection against over-temperature and current-limit conditions. These features allow for reliable operation, even in harsh operating conditions.

Conclusion

The SPX3819S-L is a versatile low quiescent current linear voltage regulator integrated circuit (IC) from EXAR. It is suitable for a wide range of applications, from battery-powered to automotive, and telecom. Its low power dissipation and very low ground current make it suitable for portable applications where current is a concern. It uses the advanced proprietary low quiescent current bias architecture to regulate output voltage from 0.8V to 10V with a voltage accuracy of ±3%. It also offers very low ground current and very low output noise, making it ideal for sensitive applications such as RF transceiver modules and microcontrollers. The SPX3819S-L also offers protection against over-temperature and current-limit conditions and is compatible with a wide range of operating temperature conditions.

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