S-80926CNPF-G8WTFU

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Power management integrated circuits (PMICs) are essential components in the power management of many electronic systems because they provide flexibility to the system by delegating power control to a readily available, off-the-shelf component. PMICs eliminate the need for multiple discrete components, thereby reducing the overall cost and complexity of the power management system.

PMICs are categorized into various device types such as voltage regulators, voltage monitoring devices and supervisory circuits. Supervisory circuits are designed to ensure proper functioning of the system once power has been applied.

S-80926CNPF-G8WTFU is a supervisor IC from STMicroelectronics. This IC provides the interface between voltage regulators and microcontrollers in order to monitor and protect the system. The monitoring function is accomplished through an input, reset, and interrupt signal combination.

The S-80926CNPF-G8WTFU has a 2.5V to 7.0V operating supply voltage range, making it suitable for multiple applications, such as automotive and consumer products. This IC is packaged in the small SOT-23-5 package, which makes the IC suitable for portable applications where the space is at a premium. It also provides 2MHz oscillator frequency and 8.5ms start-up time.

The reset signal of the S-80926CNPF-G8WTFU is used to protect microcontrollers from brownout conditions. It has an integrated voltage detector that monitors the voltage level of the power supply rail and signals the microcontroller when the voltage falls below a pre-programmed threshold. It also has an adjustable reset threshold that can be set from 2.6V to 3.9V.

The S-80926CNPF-G8WTFU also provides power-on reset delay and power-down reset delay features. Power-on reset delay is used to delay the system start-up until the voltage supply reaches its normal level. Power-down reset delay ensures that the microcontroller is reset prior to the power supply rail dropping at the end of the power down cycle. This feature prevents data corruption due to the voltage unexpectedly dropping too low before the microcontroller is reset.

The S-80926CNPF-G8WTFU has an integrated reference voltage for correct reset delay timing. It also provides a programmable reset output pulse width to ensure faster recovery from reset during power-up. The reset output function is complemented by an integrated clamping circuit to protect the microcontroller from overvoltages.

The S-80926CNPF-G8WTFU also provides an interrupt output signal which can be used to inform the microcontroller when the power supply rail has dropped below the reset threshold. This feature is useful in applications where the microcontroller needs to be alerted as soon as the power supply rail drops. The interrupt output can be latched or pulsed and has a selectable voltage range.

In summary, the S-80926CNPF-G8WTFU supervisor IC provides the interface between voltage regulators and microcontrollers. It has a wide operating supply voltage range and a small package size, making it suitable for multiple applications. It is designed to protect the microcontroller from brownout conditions, and features a programmable reset output pulse width, an adjustable reset threshold, power-on reset delay and power-down reset delay, an integrated reference voltage and an interrupt output signal.

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