DS1831B

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The DS1831B from Maxim Integrated is a precision reset IC (PMIC - Supervisors) designed for applications requiring moderate amount of accuracy and extreme reliability. The device is a rail-to-rail precision voltage detector, with an adjustable trip point, and is available in an SOT-23 package. It can be used to provide any system with a reliable reset based on a monitored supply voltage.

The DS1831B works by implementing a slope voltage measurement principle. By the use of an external capacitor and by monitoring the voltage increase on this capacitor, the DS1831B can accurately monitor the voltage in supplies over a wide range with 5% accuracy at 25°C. The trip point can be adjusted using the external capacitor by changing the value or by using an external voltage reference.

The reset function of the device is activated when the voltage is below a predetermined trip point level and remains inactive when the voltage is within the predetermined range. During power-on, the reset signal stays active for 8ms. The reset is not hold in the active state when the signal is no longer activated. The active reset signal can be used to signal a microcontroller or logic device.

The DS1831B also offers features such as an adjustable reset active time. This allows the designer to adjust the reset to the systems requirements. The device also features a power-on reset (POR) signal. This signal is activated when the power supply voltage rises above the specified reset threshold and is then disabled when the reset threshold is reached. It can be used to reset the system on power up.

The DS1831B is an ideal device for a wide range of applications where accurate voltage monitoring and reliable reset is required. This variety of applications includes digital systems, embedded controllers, automation and control networks, telecommunication systems, battery monitoring equipment, and industrial automation. The device offers high accuracy, low power consumption, and an adjustable reset time.

In summary, the DS1831B from Maxim Integrated is an excellent choice of a PMIC - Supervisors for applications requiring moderate accuracy and extreme reliability. The device monitors the supply voltage with 5% accuracy at 25°C by implementing a slope voltage measurement principle and provides a reliable reset signal when the voltage falls below a predetermined trip point. In addition, the device offers features such as adjustable reset active time and powerful-on reset signal for optimal system performance.

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