TPS3831G33DQNR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	120 ms Minimum
Voltage - Threshold:	3.08V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	4-XDFN Exposed Pad
Supplier Device Package:	4-X2SON (1x1)
Base Part Number:	TPS3831

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Introduction of TPS3831G33DQNR

TPS3831G33DQNR, an electronic device of PMIC - Supervisors, is a micropower supervisory circuit from Texas Instruments. It is designed to monitor a single power supply or multiple power supplies with the aid of digital state monitoring and reset functions. This device provides a reset signal to the external system, when the voltage is being out of the desired power supply threshold.

Application Field

TPS3831G33DQNR is applied in different sophisticated industries. For instance, its highly accurate voltage threshold and hysteresis are used to protect integrated circuits from voltage drops below expected levels. Also, it is used in medical, automotive and industrial applications. Some of the well known application fields include system reset and peripheral shut down on high-integrity power control systems, resetting a voltage regulator module in automotive modules, resetting a computer system from an AC power loss, resetting in telematics and telecommunication, reset during power up and many more.The intriguing features maintaining its reputation include automatic system reset, open drain reset output and excellent tolerance for high-voltage surges. Few of its advanced features include total power-on-reset delay from 2 msec to 65535 ms, ensuring primary and secondary power ramp sequencing and precise threshold.

Working Principle

When the applied voltage reaches the threshold of the TPS3831G33DQNR, it will send a reset signal to the target system and activate the microcontroller as well as reset all other peripherals.Basically, this device has two stages. The first stage is where voltage sensing is performed and the second stage is to generate the reset signal. First, the set voltage will be compared with the reference voltage. Reference voltage is taken from internal reference of the device and whose magnitude is fixed irrespective of the applied. If the applied voltage is higher than the reference voltage, then the voltage sensing stage is triggered and the internal comparator will provide a voltage sensitive output, which is then inverted by an inverter. This inverted output, after passing through a logic gate, will set a flip flop whose output is connected to the reset signal to the system.The flip flop output will go to the inactive state, due to the presence of the internal weak pull-down resistor, when the applied voltage falls below the reference voltage. This will reset the flip-flop, which in turn resets the target system.

Conclusion

The TPS3831G33DQNR of PMIC - Supervisors is employed in several applications. Its implementation allows protection against voltage drops below the desired levels and reset signal to target systems as per requirement. It has triggering, resetting and hysteresis voltage enabling reliability of the target system and its accuracy. Its convenient use and finely drafted features have established its foothold in automotive, telecommunications and medical industries. Its operation is based on comparison of applied and reference voltage and presence of flip-flop whose output controls the reset signal.

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