TC1271MERCTR

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TC1271MERCTR is an application field and working principle for PMIC - Supervisors. It is a single-supply supervisor with dual digital comparator with an open-drain interrupt and reset output, an internal voltage reference, and a soft start circuit. The TC1271MERCTR is designed primarily for use in battery-powered consumer product applications, where the minimized total system power is key.

The TC1271MERCTR offers two integrated digital comparators for monitoring supply voltages and other system variables; each comparator can be programmed at power-up with two voltage thresholds. The upper threshold is used as a supply upper limit, while the lower threshold is used to generate a reset or interrupt condition. The two levels of reset/interrupt generation allow the user to program a reset or a asserted or non-asserted interrupt flag.

The TC1271MERCTR functions based on two primary input parameters: enable voltage (EV) and reference voltage (RV). EV controls the enable state of the device and is typically tied to the system supply voltage. When EV is greater than the voltage on RV, the TC1271MERCTR is enabled. During this time, the output status is determined by the higher and lower trip point voltages.

The TC1271MERCTR has an internal voltage reference that provides a 1.2V output with an accuracy of ±2%. This voltage is set by an external resistor and can be adjusted by the user. This reference voltage is compared with the supply voltage and when the supply voltage exceeds this reference, an assert flag will be generated.

The TC1271MERCTR has a soft start circuit which limits inrush currents. Soft start is enabled by programming the reset flag to assert. When soft start is enabled, the reset flag will remain asserted until the supply voltage reaches the upper trip point voltage. When the upper trip point voltage is reached, the reset flag will be deasserted, and the device will return to normal operation.

The TC1271MERCTR has a watch-dog timer which can be enabled or disabled by setting a single-bit in the control register. When enabled, the watch-dog timer is a 16-bit timer, with the lower two bits being user configurable, and the upper 14 bits being set to 0xAAAA. The user can adjust the value of the lower two bits depending on the frequency of the external clock source, allowing for a more accurate calibration of the watch-dog timer.

The TC1271MERCTR also has an interrupt flag, which is set when the lower or upper trip point voltage is exceeded. This flag can be configured to be asserted or non-asserted when the interrupt occurs. This allows for more flexibility in terms of system design, minimizing the response time of the system.

In summary, the TC1271MERCTR is an ideal application field and working principle for PMIC - Supervisors. It offers a single-supply supervisor with dual digital comparator with an open-drain interrupt and reset output, an internal voltage reference, and a soft start circuit. By offering flexible programming options, the TC1271MERCTR is a great solution for battery-powered consumer product applications, where the minimized total system power is key.

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