TPS3306-18DR

The TPS3306-18DR is part of the Texas Instruments (TI) family of supervisor devices and is designed to provide simple, reliable power supply monitoring to help protect microprocessor-based systems from unwanted power supply excursions. This particular device is specially designed to monitor and protect low power applications powered directly by a 2-cell or 2-cell plus back-up battery configuration. With just one external resistor and solid-state power FET, it can provide efficient power supply monitoring, low power consumption, and a superior tolerance to environment changes.

Features

The TPS3306-18DR is an incredibly versatile device that offers a wide range of features and benefits. It features a low quiescent current (1.3 uA typ.), an adjustable push-pull or open drain reset assertion output, a watchdog timer to provide an additional layer of protection, and a failsafe reset with auto-recover feature. In addition, the device can operate with input voltage going down to 3.2 V and is designed to operate over a -40~+125 °C temperature range. It also provides a reset signal guarantee at various temperatures, allowing it to function reliably even in ever-changing toxic environments.

Application Field

The TPS3306-18DR is primarily used in applications that require robust power supervision solutions such as network and communication systems, digitals signal processing systems, embedded control systems and more. In addition, the device can also be used to protect motherboards from input voltage failure due to sudden accidental power disconnection or power surge. This could be extremely useful for PCs for ensuring their safety against damaging power irregularities.

Working Principle

The TPS3306-18DR is designed to monitor the power supply to a microprocessor system. It uses an internal comparator and an external resistor to set the upper and lower tolerance thresholds of the power supply. The device is capable of monitoring both regular and reverse voltage with two independent thresholds which can be set by external resistors. When the power supply reaches either of the two thresholds, the chip will activate a reset signal which can be used to trigger either a power monitor circuit or directly reset the system.

In addition to the reset signal, the TPS3306-18DR also features a watchdog timer which provides an additional layer of safety to the system. If enabled, the device’s watchdog timer will monitor the system’s activity and force a system reset if the system remains inactive for too long. The device also contains a failsafe reset with auto-recover feature which allows it to assert a reset signal even in cases where the voltage thresholds are too far away from each other.

Conclusion

The TPS3306-18DR is an excellent supervisor device designed to provide effective power supply monitoring and protection for low power applications such as embedded control systems and network equipment. With its adjustable push-pull outputs, watchdog timer and failsafe reset with auto-recover feature, it can provide reliable power monitoring and help keep your systems safe from unwanted power supply excursions.