TPS3306-25DGKRG4

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Introduction

The TPS3306-25DGKRG4 is a high-performance, low-power, configurable, integrated supervisory circuit designed to monitor voltages and protect against over-voltage and under-voltage conditions. This IC is also capable of providing a reset signal to the system. The TPS3306-25DGKRG4 falls into the category of PMIC (Power Management IC) supervisors, along with other integrated circuits like the LDO (Low Dropout) regulators, the PWM (Pulse Width Modulation) Controllers, and the Battery Chargers.

Application

The TPS3306-25DGKRG4 can be used for a range of applications. The most common applications include power supply monitoring and reset generation, where the circuit is used to detect and respond to over-voltage or under-voltage conditions. The TPS3306-25DGKRG4 can also be used as a reset supervisor for systems which require reset functions due to fault or power up conditions. Other applications include providing protection against input voltage fluctuations, providing adjustable power-up/ power-down delays and supply sequencing, and providing a dual-voltage system reset.

Working Principle

The TPS3306-25DGKRG4 is designed to detect voltage conditions and react accordingly. The reset signal is generated by two comparators. The first comparator detects whether the monitored voltage is higher than the set threshold, while the second comparator detects any voltage below a given setpoint. The reset circuitry is comprised of two N-channel MOSFETs connected to the comparator output, and a logic gate configured to trigger the reset. When the voltage exceeds the set threshold, the MOSFETs act as a switch and the logic gate triggers the reset signal. Similarly, when the voltage drops below the setpoint, the logic gate triggers the reset signal.

The TPS3306-25DGKRG4 has an adjustable throttle mode, which allows the generated reset signal to be held low for an adjustable period of time. This prevents the system from being reset too frequently. The duration of the throttle mode is adjustable with the ‘Rthrottle’ pin and can be set from 1 to 8 seconds. Additionally, the adjustable power-up and power-down delay limits allow precise sequencing of the monitored voltage and reset signal. The adjustable delay limit can be set with the ‘Rpwrup’ and ‘Rpwrdn’ pins.

Conclusion

The TPS3306-25DGKRG4 is a PMIC (Power Management IC) supervisor, designed to monitor and protect against over-voltage and under-voltage conditions, and to provide a reset signal to the system. The TPS3306-25DGKRG4 can be used in a range of applications, including power supply monitoring and reset generation, protection against input voltage fluctuations, and supply sequencing. The reset signal is generated by two comparators and two MOSFETs, and the reset signal can be held low for an adjustable period of time, to prevent the system from being reset too frequently. Additionally, the adjustable power-up and power-down delay limits allow precise sequencing of the monitored voltage and reset signal.

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