S-1009N08I-N4T1U

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PMIC - Supervisors

PMIC (Power Management IC) Supervisors are devices that provide precision under- and over-voltage monitoring for condition-based control of power supplies. PMIC supervisors are typically used in embedded microcontroller (MCU) systems because they can provide efficient control over power and other resources. The S-1009N08I-N4T1U is a well-known example of PMIC supervisors.

Application Field

PMIC supervisors are beneficial to a variety of embedded systems such as portable, small, and low-power applications. These small devices are used to monitor and control supply voltages in order to preserve resources, as well as to prevent system crashes or malfunctions. One example of a system that uses PMIC supervisors is a robotics system, which requires precise measurements and efficient operations in order to reliably and safely operate. To prevent unexpected fatalities, these devices are also essential for medical systems, automotive systems, and industrial automation systems.

Working Principle

S-1009N08I-N4T1U supervisors use a comparator to sense the input voltage status, an output buffer to drive external fault indicators such as buzzing, an internal voltage reference generator designed to detect under-voltage (UV), and an internal voltage source that sets the detection threshold for over-voltage (OV) conditions. The main components of S-1009N08I-N4T1U supervisors include CMOS comparator, a precision high-tolerance ±1.5% bandgap voltage reference, a temperature-independent analog output buffer, and an adjustable over-voltage latch logic, which shuts down the output voltage. The supervisor also features a wide operating temperature range, typically -40°C to +85°C.

The comparator compares the input voltage with an internal reference voltage to determine if it is low or high. Depending on the voltage level, two different signals are generated by the comparator, which are then sent to a buffer to drive external fault indicators. When the input voltage drops below the reference voltage, a negative voltage is generated and the buffer drives an open-collector shutdown output. Conversely, when the voltage exceeds the reference voltage, the comparator pulls the number of the output pins low and the buffer generates a fault logic output.

The S-1009N08I-N4T1U supervisor also features an adjustable over-voltage latch logic. This feature allows the user to adjust the over-voltage threshold as well as insulate against false-trips of the UV latch. When the voltage reaches the over-voltage threshold, the device shuts down the output voltage. In addition, the S-1009N08I-N4T1U is designed with an analog temperature-independent output buffer, which allows the user to detect over-temperature faults.

Conclusion

The S-1009N08I-N4T1U is a widely-used PMIC supervisor that is beneficial to a variety of embedded systems. By using a CMOS comparator to sense the input voltage and an adjustable over-voltage latch logic to control the output voltage, the S-1009N08I-N4T1U is designed to be efficient, reliable, and safe. Its application field is beneficial for portable, small, and low-power applications, such as robotics systems and medical systems.

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