AS1923A-BSTT-O Integrated Circuits (ICs)

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PMIC - Supervisors are important components in applications where voltages must be monitored and maintained at a fixed level. The AS1923A-BSTT-O is a useful supervisor IC, capable of detecting and outputting signals when there is an over- or under-voltage situation. Below, we will discuss the application field and working principle of the AS1923A-BSTT-O.

Application Field and Benefits

The AS1923A-BSTT-O is a versatile supervisor IC that can be used in many types of systems. Its applications include, but are not limited to, the following:

• Computer systems and electronic equipment
• Medical devices
• Automotive and industrial equipment
• Power supplies, UPS systems, and battery-operated equipment
• Avionics

The benefits of the AS1923A-BSTT-O include its low power consumption, small package size, and wide operating temperature range. Its low power consumption is achieved through its detection and output stages, which utilize low-power CMOS circuitry. This makes it an ideal choice for battery-powered applications, where power consumption is a critical factor. Additionally, the AS1923A-BSTT-O’s small package size allows it to fit in tight spaces in systems that typically have limited space for components. Finally, its wide operating temperature range (0°C to +70°C) makes it suitable for a variety of applications.

Working Principle

The AS1923A-BSTT-O employs a voltage monitoring circuit that operates with a single supply voltage, typically ranging from 2.3 to 5.5V. The IC has a threshold voltage range from 0.9 to 3.3V, with an accuracy of ±2%. If the monitored voltage falls below the threshold voltage, it will trigger an internal reset circuit, which will cause an active low reset output to be generated. The reset output is then used to force the reset of the system by setting the logic level of the reset line low.

The AS1923A-BSTT-O also features an open-drain output to indicate exactly when the under-voltage or over-voltage condition has occurred. This is useful for debugging purposes, as well as for monitoring the monitored voltage in real time. The output can also be used to indicate fault conditions, such as a loss of power.

The AS1923A-BSTT-O has an additional feature known as “power-up reset”. This feature ensures that the reset output is held low until the monitored power supply voltage reaches the designated threshold. This ensures that the system will be held in reset until the power supply has stabilized, eliminating the need for additional circuitry or manual resetting.

Conclusion

The AS1923A-BSTT-O is a versatile supervisor IC that is suitable for a wide range of applications. It is low-power, small in size, and has a wide temperature range, making it an ideal choice for battery-powered devices. Additionally, its built-in reset circuit and output stage make it easy to use and reliable. Because of its wide range of features, the AS1923A-BSTT-O is a popular choice for voltage monitoring and resetting applications.

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