UC2903N

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A supervisor integrated circuit (UC2903N) is a specialized type of power management integrated circuit (PMIC) that monitors the operation of electronic products such as computers and other digital systems. Supervisors are used to detect and protect against an array of potential fault conditions, including under and over-voltage, over-current, and abnormal temperature. In addition, they provide reset and sequencing to ensure proper power-on and power-off sequences.

The UC2903N is a robust supervisor IC with advanced features. It includes voltage monitoring of either single or multiple power supplies; over-current monitoring with a +/- 100mV monitoring window and adjustable threshold; programmable reset time-out and voltage thresholds; manual or automatic reset; active-low reset output; high accuracy voltage monitoring of up to ±1% accuracy; and advanced features such as software-controlled reset and simple analog input control.

The UC2903N is a versatile IC, capable of operating in a wide range of temperature conditions. It has an operating temperature range of -40°C to +85°C and offers both through-hole and surface mount packages. It can be used in a variety of industrial, consumer, automotive, and medical applications, from motor control systems to consumer electronics.

The UC2903N provides efficient and robust power management for a variety of circuits. Its working principle is straight-forward. An input voltage is applied at the pins of the IC and compared to a reference voltage. When the voltage is below the reference voltage, a reset is triggered and output is set to low. When the voltage is above the reference voltage, the reset is cleared and the output is set to high.

The UC2903N also offers a secondary function of under-voltage detection. This is used to detect when voltage drops below a specified level before reset is triggered. This layer of monitoring is particularly useful for monitoring battery voltage in automotive and consumer electronics applications.

The UC2903N is a versatile PMIC that provides robust power protection and monitoring to a variety of circuits. It is ideal for a wide range of low power, embedded applications in industrial, consumer, automotive, and medical markets. The combination of strong reset, under-voltage detection, temperature performance, and input voltage control make it an excellent choice for power management in a wide range of applications.

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