SM72240MF-3.08/NOPB

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Power management integrated circuits (PMICs) are used in many applications such as consumer electronics and automotive systems. They provide superior control and flexibility for the system designer. PMICs can be categorized in many ways, such as DC-DC converter modules, voltage and current references, voltage regulators, and supervisors. The SM72240MF-3.08/NOPB is an example of a PMIC supervisor.

Application Field

The SM72240MF-3.08/NOPB is a multi-function reset supervisor used to provide reliable start-up, monitoring and control functions for embedded computing systems. It is used in a wide range of applications, including cell phones, digital cameras, printers, RF transmitters, graphics cards, and FPGA development boards. It can also be used in automotive systems, industrial computing and data communication devices. The device features an integrated voltage supervisor that monitors the power supply voltage levels, a 32-bit software reset timer to detect system lock-ups and a hybrid supervisor that provides two configurable levels of reset signaling depending on the system requirements.

The SM72240MF-3.08/NOPB is designed to minimize power consumption in battery-powered systems by entering a low-power mode when the system is inactive. The supervisor has a wide operating voltage range of 0.8V to 5.5V and supports both 3.3V and 5V VDD peripherals. The device requires only 0.8V to start-up, which provides increased immunity to interference and reduces power consumption during start-up.

Working Principle

The SM72240MF-3.08/NOPB supervisor monitors the power supply voltage levels to protect the processor from voltage supply excursions. The device provides two configurable reset signals: an active-low hardware reset signal and a delayed active-low reset signal. The hardware reset signal is generated during power-on and when the voltage level is below a configurable threshold. The delayed reset signal is generated after a programmable timeout period, allowing the system to recover from transient voltage excursions. The supervisor also features an integrated 32-bit software reset timer that can be used to detect processor lock-ups in real-time. The timer can be programmed to issue a reset signal after a user-defined timeout period, allowing the application to recover from errors without having to manually reset the system.

The SM72240MF-3.08/NOPB features an integrated voltage supervisor that is capable of monitoring multiple supply nodes simultaneously. The supervisor has two programmable threshold levels and two configurable active-low reset signals. The first threshold level generates a reset signal when the voltage level drops below a programmed threshold. The second threshold level generates a reset signal when the voltage level rises above the programmed threshold. The device also features an integrated temperature sensor and four temperature thresholds that can be used to monitor system temperatures and generate reset signals accordingly. The device also supports a variety of system reset sources, including software, power-on-reset, peak current monitoring and watchdog signals.

The SM72240MF-3.08/NOPB is designed to provide reliable start-up and system supervision in embedded computing applications. The device supports configurable reset signals to detect system errors and monitor system temperatures. The integrated voltage supervisor monitors the power supply voltage levels and provides two configurable reset signals. The device also features an integrated temperature sensor and four temperature thresholds, and supports a variety of system reset sources for increased reliability.

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