BU4909G-TR

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The BU4909G-TR is a new type of integrated circuit from ROHM Semiconductor. It is designed to be a multifunctional power management IC (PMIC), as well as a supervisor for micro-processors and other applications. As with any PMIC, the BU4909G-TR has several different functions and is used to monitor, protect, and regulate the power inputs for any application where it is used. The BU4909G-TR is able to do this because of its Power On Reset (POR) and Power Inhibit (PI) functions. These allow the supervisor to shut down or power off the device if certain conditions are not met.

The Power On Reset function is triggered when the power supply voltage going into a device rises to a certain predetermined level. The supervisor will then shut down or power off the device if the specified level is not met. This helps prevent the device from being powered on when a voltage is present that is too low for the device to properly run. It also helps prevent power outages during power up or power down. The supervisor will then reset the device when the power supply is back at the correct level. In addition, the supervisor can be configured to shut down the device if the power supply voltage rises too quickly.

The Power Inhibit function of the BU4909G-TR is used to prevent certain functions from being used when the device is powered on. It can be used to disable certain parameters or features of the device, such as the clock speed or memory size. This helps ensure that the device is running at its optimum configuration based on the specific application requirements. For example, some applications may require a fast clock speed while others may require a slower one. By using the Power Inhibit function, the supervisor can make sure that the device is running according to the specific application requirements.

The BU4909G-TR also has a watchdog timer which can be used to monitor the power supply voltage level. The timer is designed to trigger an interrupt if the power supply voltage drops below a particular level for a predetermined period of time. This allows the supervisor to quickly shut down the device if the power supply fails or if the device is running at an abnormal speed. It is important to note that the watchdog timer must be set correctly in order for it to properly monitor the power supply voltage levels.

In addition to its Power On Reset, Power Inhibit and watchdog timer functions, the BU4909G-TR also has a shared power source protection feature. This feature helps to reduce the amount of power consumed when multiple devices are connected to a single power supply. It works by reducing the power consumption of the devices sharing the same power supply. This helps to prevent any power shortages or surges which could damage the devices.

Overall, the BU4909G-TR is a versatile PMIC with a wide range of functions and features. It is capable of monitoring, protecting, and regulating the power supply as well as providing a watchdog timer and shared power source protection. This makes it ideal for use in micro-processors and other applications which require reliable power management.

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