NCP303LSN22T1G

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PMIC (Power Management Integrated Circuits) supervisors are devices used to protect digital microprocessor circuits against overvoltage and power-related events. NCP303LSN22T1G is a supervisor device that offers continuous protection of integrated circuits (ICs) from overvoltage and latch-up conditions. It has a low voltage monitor that detects out of range undervoltage (UV) conditions, as well as a power-on reset (POR) circuit that delays and resets the system when power is applied.

Application Field of NCP303LSN22T1G

The NCP303LSN22T1G is a cost-effective single-channel supervisor which is suitable for various applications, such as consumer electronics, automotive, and industrial equipment. It has an adjustable required operating voltage range, which allows it to be used with a wide range of input voltages. It also provides protections against overvoltage, undervoltage, and inrush current conditions.

In consumer electronics, the NCP303LSN22T1G can be used to provide protection in AC-DC or DC-DC converters, as well as in LED or LCD displays. It can be used to prevent excess current or voltage from damaging the ICs in these systems. In automotive applications, it can protect ECUs and other vehicle electronics from voltage spikes caused by sudden changes in the circuit. In industrial applications, the NCP303LSN22T1G can be used to protect sensors and other ICs from sustained high temperature and excessive current.

Working Principle of NCP303LSN22T1G

The NCP303LSN22T1G has an open-drain output, which means that its output is always low unless the input voltage reaches a certain threshold. This threshold is determined by the user-programmable voltage reference (VP pin). When the input voltage exceeds the VP pin, the output will transition from low to high and stay high until the input voltage falls below the VP pin. This ensures that the circuit remains protected from overvoltage and undervoltage conditions.

In addition to its open-drain output, the NCP303LSN22T1G also has an active low power-on reset (POR) circuit, which delays and resets the system when power is applied. This POR circuit is triggered when the input voltage reaches a certain level, and it stays active until the voltage is reduced to a certain level. This ensures that the system is properly reset and prevents any unexpected power-on spikes.

The NCP303LSN22T1G also has a built-in temperature protection circuit, which limits the temperature of the integrated circuit and prevents it from overheating. This temperature protection circuit monitors the temperature of the IC and shuts down the power when it reaches a certain threshold. This ensures that the IC is protected from any thermal damage.

Overall, the NCP303LSN22T1G is an effective single-channel supervisor which provides continuous protection of integrated circuits from overvoltage and latch-up conditions. It has a user-programmable voltage reference, an open-drain output, and a power-on reset circuit. It also has a temperature protection circuit to ensure that the IC remains safe from any thermal damage. This makes it ideal for a variety of applications, including consumer electronics, automotive, and industrial equipment.

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