DS1231S-50+

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PMIC (Power Management Integrated Circuit) plays an important role in many modern electronic systems – they provide a variety of power components that have a short hand of function, cost, size and thermal constraints. In particular, PMIC Supervisors are special types of devices used for supervising low voltage conditions in a system and for providing a reset signal as required. The DS1231S-50+ is a popular PMIC Supervisor, used widely in many electronic system applications.

Overview of DS1231S-50+

The DS1231S-50+ is a low power, miniature, dual-user supervisor manufactured by Texas Instruments. It can support a wide range of input voltages, typically 3V to 5.5V, making it ideal for applications where space and power consumption are at a premium. It is designed to provide precise and reliable trip point voltage monitoring and reset functions. The device offers an inrush current limit of 50 mA, giving it an optimal efficiency rating while also limiting current spikes.

DS1231S-50+ Application Fields

The DS1231S-50+ is suitable for use in many applications, including:

• Personal computers, notebooks, and embedded systems.
• Portable medical and industrial equipment.
• Set-top boxes and digital TVs.
• Smartphones, automotive, home automation and other consumer electronic products.
• Item tracking, monitoring devices and other remote control systems.

Working Principle of DS1231S-50+

The DS1231S-50+ consists of two main components – a voltage reference circuit, and a comparator circuit. The voltage reference circuit is used to generate an accurate reference voltage, while the comparator circuit compares the input voltage to the reference voltage and generates a reset signal when the input voltage drops below the reference voltage. Threshold voltage accuracy is ±3%.

The reset signal generated by the DS1231S-50+ is used to trigger an external reset signal and also to provide an open-drain output for reset monitoring. The device has a built-in reset time of 200ms, providing a delay time before the reset signal is triggered. The device also features a temperature-compensated reset function to reduce the effects of variation in the power supply voltage.

The DS1231S-50+ also has integrated over-temperature protection, providing an additional level of protection against typical temperature-induced faults. If the internal die temperature exceeds the over-temperature threshold, the device will reset itself and the system.

Conclusion

The DS1231S-50+ is a flexible and reliable PMIC Supervisor designed specifically for applications where energy efficiency and space are at a premium. Its wide range of input voltages, precise trip point monitoring, integrated over-temperature protection, and low current spikes make it an ideal choice for a variety of system applications.

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