TPS389050LQDSERQ1

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TPS389050LQDSERQ1 Application Field and Working Principle

The TPS389050LQDSERQ1 is a supervisor manufactured by Texas Instruments. This integrated circuit (IC) is part of the PMIC – Supervisors, which are used to detect an under-voltage lockout (UVLO) state, then reset system power to enable the system to start. It is a low power microprocessor supervisor designed for applications requiring ARD and PSI threshold detection, reset and monitoring, Small Size & Superior Accuracy.

Application Fields for TPS389050LQDSERQ1

The TPS389050LQDSERQ1 is designed to be used in applications such as industrial equipment, healthcare, telecommunications, commercial and automotive applications. Its small form factor and superior accuracy make it a suitable for these applications as it helps assure reliable operation. Some of its features include programmable threshold levels, 0.8V to 5.5V operating voltage range and low quiescent current consumption.

Working Principle of TPS389050LQDSERQ1

The TPS389050LQDSERQ1 activates two delay-enabled reset outputs, /RESET and /PSI_RST, when the power supply falls below the programmed reset threshold levels. It has two delay outputs that can be configured as a pulse width modulated (PWM) signal or as a digital output. The reset threshold levels are set using a single-pin voltage threshold register. When the voltage on the input falls below the set threshold, the device’s internal voltage monitor initiates a power-up reset which clears the device and any attached logic. If the voltage is exceeded prior to the power-up time, the device will not reset. The /RESET and /PSI_RST outputs remain active until the voltage on the input rises above its reset threshold or the delay time elapses, whichever comes first.

The TPS389050LQDSERQ1 also has a programmable watchdog timer. The watchdog timer is used when the operating system requires an additional periodic reset. This can help with detecting the occurrence of frozen execution. The device also features a 5.25V overvoltage detector output and an input voltage monitor. This feature can be used to monitor the power supply voltage and to shut down the system in the event of an overvoltage or brownout condition.

Conclusion

The TPS389050LQDSERQ1 is a low-power microprocessor supervisor designed for applications requiring ARD and PSI threshold detection, reset, and monitoring. It is suitable for applications such as industrial equipment, healthcare, telecommunications, commercial, and automotive applications. It operates on a 0.8V to 5.5V operating voltage range with a programmable threshold and reset. Operating as a part of Texas Instruments’ PMIC – Supervisors, the TPS389050LQDSERQ1 is reliable for critical applications, offering accurate reset timing and exceptional safety features.

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