NCP308SN190T1G

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PMIC (power management IC) supervisors are designed to ensure correct operation in a variety of electronic systems. The NCP308SN190T1G is a versatile supervisor designed to manage and monitor power up and down events, providing protection against out-of-range voltage, current, or temperature. This article will discuss the application fields and working principle of the NCP308SN190T1G.

The NCP308SN190T1G is a compact, CMOS voltage supervisor that can be integrated into a wide variety of applications. The NCP308SN190T1G offers overvoltage and brown-out protection as well as programmable monitoring windows and reset generation. Its features make it an ideal choice for numerous mission-critical, safety-critical and time-critical applications such as automotive, military, industrial and consumer applications. This supervisor provides an idle-mode feature so the device can detect power-up and power-down events while in the idle-mode. It is packaged in an 8-pin ultra-small, thin S.O.P (Small Outline Package), making it ideal for space-constrained systems.

The NCP308SN190T1G offers significant protection for numerous system applications, including out-of-range-voltage (OVP), extended-temperature (EXTT) monitoring. The OVP feature of the NCP308SN190T1G allows it to detect and provide protection against both overvoltage and undershoot conditions. The EXTT feature gives the supervisor temperature capability up to 105°C. In addition, the supervisor has an adjustable delay (DLY) between power-on and power-on reset (POR) generation, which provides a programmable time window of up to 0.832 seconds.

The working principle of the NCP308SN190T1G is straightforward. It has an input voltage range of 2V to 5.5V and is designed to detect when the input voltage is outside of this voltage range. When the input voltage is within the expected operating range, the output voltage remains low. However, when the input voltage drops below the specified minimum (or rises above the specified maximum), the output voltage is pulled high. This output signal is then used to generate a system reset, which causes the system to enter a safe state.

In addition to the input and output monitoring, the NCP308SN190T1G also has a slew rate control. The slew rate control allows the supervisor to gradually raise and lower the voltage as it approaches the low or high thresholds, avoiding any sudden drops or rises which may cause system malfunction. The NCP308SN190T1G also has a reset delay (DLY) feature, which allows the supervisor to wait for a predetermined amount of time before asserting a reset. This feature can be useful in situations where a power failure may cause a large current spike which can damage components.

The NCP308SN190T1G is a versatile supervisor that can be used to monitor and protect numerous system applications. Its high-accuracy and wide-voltage sensing range allows it to provide robust protection against overvoltage, undershoot, and extended temperature conditions, as well as programmable reset times. The slew rate control and reset delay features make it an ideal choice for applications where power up and power down events need to be monitored and reset is required to ensure correct operation.

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