DS1818R-10/T&R

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PMIC (Power Management Integrated Circuit) is a complex type of integrated circuit, which is a popular device for managing the power of electronic circuits. Supervisors, as one type of PMIC, are used for monitoring power supply and system voltage, detecting the power-on reset of the system and supplying reset signals to various circuits in order to maintain the stable operation of the system. The DS1818R-10/T&R Supervisors are the latest series of Supervisors developed by Maxim Integrated, which feature enhanced monitoring and reset functions and optimized performance characteristics over previous models. This article will introduce DS1818R-10/T&R Supervisors, including their application field and working principle.

Application Field of DS1818R-10/T&R Supervisors:

DS1818R-10/T&R Supervisors can be used in many embedded applications, such as industrial and consumer devices, automotive electronic products, digital home media and IT systems. They are an ideal choice for loading a large number of low power devices, ensuring that those low power devices can be reliably detected, reset and initiate the system power-on-reset sequence in a secure and reliable manner. At the same time, the Supervisors are capable of delivering low reset signals down to 0.8V, thus providing reliable reset signals for embedded application even in low voltage environments.

Working Principle Of DS1818R-10/T&R Supervisors:

DS1818R-10/T&R Supervisors use a wide input voltage range of 1.7V up to 5.5V, which makes them highly compatible with various embedded systems. They use two bipolar power supply inputs with different voltage thresholds to form a differential circuit. With the differential circuit, one voltage threshold will be lower than the other and the Supervisors will compare the voltage differences between these two inputs. If the differences exceeded the preset standards, the Supervisors will output a reset signal to the system, resetting the system and starting the system power-on sequence, ultimately restoring the system to a usable state.

The Supervisors also have a dedicated "reset switch" input, which can be used to set a key stroke to trigger a system reset. This is done by connecting the input to a key stroke operation, for example by connecting it to a push button. By doing so, a system reset can be achieved with the press of a button, and there is no need for external trigger or controlling signals.

DS1818R-10/T&R Supervisors also feature programmable power delay setting, which can be set between 1ms to 250ms. This allows system designers to reduce the total power-on time and avoid potential boot issues, without compromising the stability of the system.

DS1818R-10/T&R Supervisors also come equipped with a versatile and robust UVLO (Under-Voltage Lockout) and adjustable reset timer, which provides tight control on power-on and power-down of the system. The programmable reset timer, together with the adjustable UVLO and power delay settings, make DS1818R-10/T&R Supervisors a highly capable and versatile supervisor that can reliably protect embedded system against accidental power-on or power-down failures and significant voltage fluctuations.

DS1818R-10/T&R Supervisors are also designed with high output current capability of 40mA, which gives system designers more leeway to design their applications. The Supervisors also feature low power consumption of 0.45mA and are available in a small 6-pin SOT-23 package, making them suitable for applications with limited space.

Finally, DS1818R-10/T&R Supervisors are also integrated with advanced protection features, such as reverse polarity protection, thermal overload protection and protection against too high voltage. These features are important for ensuring the long-term performance and stability of embedded systems, especially in tough environments.

In conclusion, DS1818R-10/T&R Supervisors are a highly capable and versatile series of Supervisors from Maxim Integrated, which are designed for embedded applications. With its wide input voltage range, reset switch input, programmable power delay setting, UVLO and adjustable reset timer, reverse polarity protection, thermal overload protection and protection against too high voltage, DS1818R-10/T&R Supervisors are an excellent choice for reliable power management and system voltage monitoring.

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