S-80855CNY-B2-U

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Power management ICs (PMICs) are integrated circuits that are used to provide power and deliver battery performance in a micro-package. PMICs are used in a variety of applications, from portable devices to large systems. One of the common PMICs is the S-80855CNY-B2-U. This PMIC is a supervisor and acts as a system monitor, providing failure protection and performing reset and supervisory functions.

Description

The S-80855CNY-B2-U is a supervisor IC, and it is typically used in applications that require a failsafe operation or protection from system malfunctions. It generates a reset output, which is a logical high signal that is triggered in case of power overages or brownouts. The IC offers one open-drain manual reset input, one reset output, and one active-high reset release signal. It also features an active-low power-on reset signal and optional watch-dog timer control. The operating voltage of the S-80855CNY-B2-U is from 2 V to 5.5 V, while the operating temperature range is from -40°C to 85°C. The IC is available in a 8-pin SOIC package.

Applications

The S-80855CNY-B2-U is typically used in microcontrollers, embedded systems, and analog to digital converters. It is also used in industrial, automotive, and medical applications. The supervisor can be used to protect microcontrollers and systems in critical applications, such as those used in medical imaging systems and industrial controllers. An advantage of the S-80855CNY-B2-U is that it consumes very low power, as it draws only 5µA when operating. This makes it a suitable choice for battery-powered applications.

Working Principle

The S-80855CNY-B2-U acts as a system monitor to detect power failures or brownouts. The reset output is a logical high signal that is triggered when an overvoltage or undervoltage is detected. The IC also features a watch-dog timer for system redundancy. It employs a time-out circuit that can be configured as a watch-dog timer or as a power-on reset timer. When used as a watch-dog timer, the IC functions as a failsafe system to detect system errors. The timer can be programmed with a predetermined timeout period, usually ranging from 12ms to 128ms. When the timer expires, the reset output is triggered and the system is reset. If the timeout period is exceeded, then the reset signal is released.

Conclusion

The S-80855CNY-B2-U is a PMIC supervisor. It is typically used in critical applications, such as those used in medical imaging systems, embedded systems, and industrial controllers. The supervisor can detect power failures or brownouts and can generate a reset output signal. It also features a watch-dog timer for system redundancy and employs a time-out circuit. The S-80855CNY-B2-U is low power and suitable for battery-powered applications. It operates over a wide temperature range and offers features such as active-low power-on reset and manual reset input.

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