S-80860CNUA-B9LT2U

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Power management integrated circuits (PMICs) are a major component in the design of robust and energy efficient products. PMICs are responsible for providing power stability and protection against voltage, current and temperature irregularities that can lead to system malfunctions or improper operation. PMICs are used in a variety of architectures, ranging from automotive to industrial, communication and consumer applications.One of the most advanced type of PMICs available is Supervisors. It is designed to monitor various input signals and generate a reset signal to guard against system malfunctions triggered by voltage or current irregularities.A typical application of a Supervisor is S-80860CNUA-B9LT2U, which is a low voltage supervisory circuit for microcontroller applications. It is specifically designed for portable and embedded applications and it integrates a microcontroller reset, three general purpose input/output (GPIO) signals, and cycle-by-cycle current limitation.The features of S-80860CNUA-B9LT2U includes a highly accurate reset threshold, a low power consumption Any Reset mode, up to three independent general-purpose input signals, and an adjustable, multi-level cycle-by-cycleovercurrent protection circuit. It also features a Throttle open phase-lock loop (PLL) Soft start function at power up and a Fault Pin, which is an open-collector PNP transistor output.When it comes to the application field, S-80860CNUA-B9LT2U can be applied in power supply systems, automotive electronics, industrial control systems, portable products, signalling systems and digital TV.The working principle of S-80860CNUA-B9LT2U can be summarised in three steps.First, it monitors the VCC input voltage. When the input voltage rises above the reset threshold, the RESET pin is released low.The GPIO output is also driven high and the reset sequence is complete.Second, any increase in the external supply voltage from the pre-set voltage level is monitored and the Throttle pin is driven high for a soft start sequence.Third, a shutdown current is applied to the VCC pin if the current load exceeds a pre-set level. The current can be adjusted via the internal Gain setting.Overall, S-80860CNUA-B9LT2U is a high performance and reliable supervision circuit that is suitable for use in a variety of applications.

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