TPS3813J25DBVT

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TPS3813J25DBVT is a type of ultra-low-power supervisory circuit from Texas Instruments. It is designed to monitor the regulated 3.3V power supply of battery-powered electronic devices. It combines the functions of an adjustable voltage reset, adjustable voltage monitor and a push-pull or open-drain reset output. This circuit offers an excellent combination of performance, current consumption and accuracy.

Applications

TPS3813J25DBVT is suitable for a variety of applications including embedded control, telecommunications and medical equipment. It can also be used in smart card readers, external memory, ATX power supplies and system on chips.

It is also especially designed to detect and reset the processor in digital applications that are powered by a battery. The TPS3813J25DBVT can detect the minimum acceptable battery voltage and will automatically reset the processor when the voltage level drops below the pre-programmed reset threshold. This helps to ensure that the processor’s data integrity and reliability are maintained while minimizing battery consumption.

Working Principle

TPS3813J25DBVT has two comparator inputs: Vref, which determines the reset threshold, and Vmon, which is compared against the reference voltage. When the voltage of Vmon is lower than the reference voltage, the DOUT output is high. When the threshold is exceeded, the output is low. It also has an active-low power-on reset output (nRESET) that keeps the system from starting up until the voltage is within the range.

This reset circuit has a power-on reset circuit composed of a band-gap reference and comparator. An internal switch initiates the start-up process when there is power-up and it will only come out of reset and start up when the voltage level is above the reference threshold. The TPS3813J25DBV’s lockout voltage can adjust up to 4.2 Volts, making it suitable for use with a variety of battery chemistries.

In addition, the TPS3813J25DBV features an adjustable reset timeout that ensures that the processor is held in reset until the voltage has been stabilized, eliminating spikes and minimizing the minimum reset voltage.

Conclusion

The TPS3813J25DBVT is an ultra-low-power supervisory circuit from Texas Instruments. It offers excellent performance and accuracy for applications powered by batteries, with adjustable reset threshold, monitor and reset output. Furthermore, it has an adjustable reset timeout to ensure the processor is held in reset until the voltage is stabilized.

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