S-80831CNNB-B8QT2G

Power management integrated circuit (PMIC), also known as power chip, is an important component of power system design. It is responsible for providing adequate, stable and reliable power supply to all parts of the system and ensuring the normal and safe operation of the whole system. The supervisor in PMIC is mainly used to monitor the power management and system reset. S-80831CNNB-B8QT2G is a standard 3.3V supervisor IC that provides system reset and independent power-on reset (POR) functions.

The S-80831CNNB-B8QT2G, or prevalidated monitor, is designed to monitor internal and external system voltages, detect and signal power failure, minimize reset pulse width, and internally reset the system. The device is available in space-saving SO-8, SOT-23-5 and DFN-6 packages and has a low standby current of 1μA, making it suitable for real-time battery-powered applications. It has an input operating range of 1.4V to 5.5V, a very low reset threshold voltage of 2.2V, and it generates low power consumption with a power supply current of only 4μA.

The S-80831CNNB-B8QT2G is mainly applicable to the design of mobile intelligent terminals, such as smart phones and tablets, which require designing a reset circuit, thereby protecting the system against unexpected power off and intervening to keep the operation of the system stable. It can also be used in other systems, such as laptop computers, routers, LED screens and other systems that require power reset.

In addition, the S-80831CNNB-B8QT2G has superior self-stabilization performance and can monitor sudden power failure or overvoltage caused by external effects such as AC power disturbances and mechanical disturbances. The disadvantage of the S-80831CNNB-B8QT2G is that its reset output current is low and not suitable for high-current load startup. Moreover, its input power parasitic is also relatively high, which will cause excessive power consumption.

The working principle of S-80831CNNB-B8QT2G is relatively simple. It mainly monitors the power supply voltage through the input pin and sends out a reset signal when the power supply voltage is lower than the preset reset voltage. Once voltage monitoring is performed, the IC then has its own reset circuitry, which creates a logic low signal in the reset output pin to reset the system. The reset voltage can be adjusted according to different devices. After system power-up, if the voltage exceeds the reset voltage, the reset pin will reset to its high state, ensuring that the device will be reset again when it fails.

In conclusion, the S-80831CNNB-B8QT2G is a highly general-purpose supervisor IC for system reset and power-on reset, suitable for applications in mobile intelligent terminals and other systems. Its low standby current and input operating range make it an ideal choice for a variety of power management applications. It has superior self-stabilization performance, but its reset output current is not suitable for high-current load startup and its input power parasitic is relatively high. Its working principle is relatively simple—it monitors the power supply voltage, sends out a reset signal if the power supply voltage is lower than the preset voltage, and creates a logic low or high status in the reset pin while it is reset.