TPS3837J25DBVT

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PMIC or Power Management IC is a class of integrated circuit (IC) that manages the power flow between hardware and subsystems. The TPS3837J25DBVT is a member of this group and is used to provide reset and watchdog functionality for microprocessors and other peripherals that require a reset signal. It also provides an analog voltage supervisor to monitor and protect the voltage levels of various system components. This article will discuss the application field and working principle of the TPS3837J25DBVT.

The TPS3837J25DBVT is primarily used in automotive and other safety-critical applications that must reset or shut down in response to several conditions, including power supply failure, brownout, and over voltage conditions. The device has a built-in reset timer and hardware controlled reset delay. It detects over-voltage conditions and responds with an active-low reset signal within set time limits. The TPS3837J25DBVT also has a robust watchdog timer with a selectable timeout period, allowing it to monitor and detect any system failures and reset the system as needed.

The TPS3837J25DBVT has an analog voltage supervisor, which can be programmed to detect any failure in supply voltage. An internal voltage divider sets the voltage thresholds and the pullup and pulldown resistors provide the necessary hysteresis. The device can also be configured to detect and respond to open, close, or change of load conditions. The voltage supervisor is powered on or off using the enable pin.

The TPS3837J25DBVT also features a pin-programmable reset output flip-flop that can be set to reset or not depending on a logic level at the reset input pin. This allows the device to monitor a variety of system signals and respond accordingly. The reset output can be monitored for either a low or high logic level is sent indicating the manual reset or the reset following an active reset condition.

The TPS3837J25DBVT also has an active-low reset IN pin, which can be used to reset the device either manually or with software. Additionally, the device provides an active-low power-down reset that can be used to shutdown the device to prevent excess current consumption. This active-low reset is activated when the device experiences an over-voltage condition or when the voltage drops below that of an internal before timeout threshold.

In summary, the TPS3837J25DBVT is a power management IC that provides reset and watchdog functions for microprocessors and other peripherals. It also provides an analog voltage supervisor to monitor and protect the supply voltage of the system. The device has a reset timer and a watchdog timer with a selectable timeout period. It has an active-low reset pin and an active-low power-down reset for shutdown and protection against over-voltage conditions. The device can be programmed to respond to change of load conditions and can send an active-low or active-high logic level indicating the reset condition. With all of these features, the TPS3837J25DBVT makes a reliable choice for use in automotive and other power-sensitive applications.

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