TPS3850H12DRCT

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TPS3850H12DRCT is a voltage supervisor used in power management integrated circuits (PMICs). It acts as a threshold detector tailored for embedded devices that require a single-ended input to detect power supply accuracy, or to indicate out-of-range conditions. The device is designed to manage various applications, such as memory power supply sequencing, system reset and brown-out protection, power supply fault detection and event logging.

The TPS3850H12DRCT can operate in two main modes, active and power-down. In active mode, the device monitors the voltage supply of embedded devices for out-of-range conditions. The device regularly compares the input voltage supply level with a user-programmable threshold voltage and stays active until the condition is met. Whenever the input voltage supply level is outside of the user-defined voltage range, the TPS3850H12DRCT will assert the RESET/NRESET, generating a reset pulse.

When the device is in power-down mode, it will continue to monitor the voltage supplied to the embedded device. It will detect any changes in the power supply, and then activate its reset pulse. In this case, the device will draw only a small amount of current, which is useful in power-sensitive applications.

The TPS3850H12DRCT is commonly used in embedded devices, such as automotive electronic controllers, communication use devices and industrial automation equipment. It is also used in consumer electronic devices such as mobile phones, digital cameras and set-top boxes. The device has a very low quiescent current of 7 μA and ensures high reliability with its 2kV ESD protection and a high noise immunity of -45dB at 100KHz.

In terms of features, the TPS3850H12DRCT provides a user-configurable voltage threshold, with a range from 0.55V to 5.5V. It also provides an external RC soft reset time of up to 16 seconds for the reset pulse, along with a programmable delay time for active state to power-down transition. The device has a temperature operating range between -40°C and 125°C.

The TPS3850H12DRCT uses a hysteretic design, where the user-defined voltage threshold is compared to the input supply voltage through an internal comparator. Whenever the input supply voltage exceeds the threshold, the output of the comparator is inverted and enables the device to assert the reset pulse. The device also has an internal voltage reference to ensure accurate voltage detection.

In summary, the TPS3850H12DRCT is a single-ended, low-power voltage supervisor suitable for embedded devices that require a reliable detection of power supply voltage. It provides user-programmable voltage thresholds, programmable reset time, and other features to ensure accurate voltage detection and power management. Its many features make it a popular choice for embedded applications.

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