TPS3809I50DBVRG4

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The TPS3809I50DBVRG4 PMIC (power management integrated circuit) has a wide variety of applications, including but not limited to automotive and industrial use. This low-power voltage supervisor is designed to protect systems from power supply irregularities and prevent them from operating at an abnormally high or low voltage. It is one of the most commonly used PMICs for such purposes.

Overview

The TPS3809I50DBVRG4 is a voltage supervisor with integrated system power management capabilities. The device is composed of a voltage supervisor, a reset generator, and a 10mA power rail-sequencing circuit with a supply switch. It is available in a 4-pin PowerDFN SOT-23 package and a 4-pin SOT-23 package. It has an operating temperature range of –40°C to 125°C and a voltage range of 3.0V to 6.5V. The device has a maximum supply current of 10mA and all outputs are compatible with TTL/CMOS logic levels.

Applications

The TPS3809I50DBVRG4 is a low-power voltage supervisor device designed for automotive and industrial applications. It can be used in any system requiring the monitoring of its power supply voltage. It is well-suited for automotive applications such as engine control systems, power steering, body control modules, and fuel pump control. It is also used in industrial control systems for protection against overvoltage and undervoltage conditions.

Working Principle

The TPS3809I50DBVRG4 is a voltage supervisor device composed of a voltage monitor, reset generator, and 10mA power rail-sequencing circuit with a supply switch. The voltage monitor monitors the VCC voltage and has two output pin states, the reset pin and power good pin. If the VCC voltage is higher or lower than the specified upper and lower thresholds, the reset pin will be pulled low, indicating a power fault. The power good pin is pulled low if the VCC voltage is within the specified range. The reset generator can generate an output reset pulse for power up reset, watch dog reset, and brown out reset signals. The 10mA power rail-sequencing circuit ensures that the system power is sequenced properly to prevent damage from simultaneous power up errors. The supply switch is used to enable and disable power supply to the system.

Conclusion

The TPS3809I50DBVRG4 is a low-power voltage supervisor designed for automotive and industrial applications. It provides a simple and cost-effective solution for monitoring system power supplies and protecting against power supply irregularities. It has an integrated reset generator and 10mA power rail-sequencing circuit, which ensure that power up, watch dog, and brown out reset sequences are properly and quickly handled.

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