RNA51958BFP#H0

PMIC (Power Management Integrated Circuit) is an integrated circuit that provides power management functions. One type of PMIC is termed supervisors, which are used to supervise the power supply line of systems, maintain a steady power supply, and provide warning signals and fault protection when the system power supply line is in abnormal situation. This article will discuss the application field and working principle of RNA51958BFP#H0, a low cost supervisor IC to protect the power supply of systems.

RNA51958BFP#H0 is designed for high-volume consumer applications,such asnotebook PCs, mobile phones, digital cameras, camcorders, andmore. It offers system protection with the addition of a resetoutput, over-voltage protection (OVP) and over-temperatureprotection (OTP) at+ 1.8V to 5.25Vwith internal over-currentprotection. On top of that, this product features a lowoperating current of 3.3 Aand low quiescent current, with 22.4 μA at 3V. OVP accuracy is within ±8mV, and a low hysteresis of 10mV.

The basic working principle of this product is that it monitors the input voltage and automatically generates a reset to the controlling unit (such as a microcontroller) when the voltage falls out of the specified range or when the current or the temperature become too high. This reset usually ends up in a cold start, ensuring better system stability and reliability. Moreover, this supervisor IC also supports Watch Dog Timer, Early Warning and Thermostat Reset Modes.

The following are some typical application scenarios of RNA51958BFP#H0: when the system input voltage is lower than the minimum low cutoff voltage, the supporter will send out a warning signal to alert; when the input voltage is higher than the maximum high cutoff voltage, the voltage limiting protection will be triggered;when the system current is over the current limit protection, the current limiting protection will be triggered; when the temperature exceeds the threshold, the temperature limiting protection will be triggered.

In conclusion, RNA51958BFP#H0 is an excellent low-cost supervisor IC used for power supply line monitoring and protection, making it an ideal choice for wide range of consumer applications. With its simple and advanced features, it not only provides the system the necessary reset and protection, but it also adds additional features such as watch dog timer, early warning and thermostat reset modes for better system stability, reliability, and safety.