DS1811R-10/T&R

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PMIC stands for power management integrated circuit. Supervisors, which is a product within the PMIC family, is an integrated circuit which is used for monitoring power and providing various protections for the system. DS1811R-10/T&R is a supervisor developed by Maxim Integrated, which provides system reset output and power failure detect (PFD) reset output. It is designed to be used with microcontrollers and digital signal processors in always-on connected systems. It is equipped with safety features that ensure that the system recovers correctly in the event of a fault or a power outage. In this article, we will look at the application field, features and working principle of DS1811R-10/T&R supervisor.

Application field of DS1811R-10/T&R supervisor

DS1811R-10/T&R supervisor is designed for use in always-on connected systems for microcontrollers and digital signal processors. Its unique, low-power design allows it to remain in low-power (“sleep”) mode for extended periods of time and still provide reliable system reset and monitoring. This feature makes it ideal for monitoring inputs from smart meters, cloud infrastructure or sensors. It can also be used in mobile and battery-operated systems, such as mobile phones, wearable electronics and portable medical devices, to reduce power consumption and provide accurate monitoring of power fail events. Additionally, the supervisor can be used in automotive, industrial and aerospace/defense systems to monitor key parameters in the system.

Features of DS1811R-10/T&R supervisor

DS1811R-10/T&R supervisor provides advanced monitoring, overvoltage/undervoltage protection and system reset functions. It also includes programmable supply voltage and reset transition thresholds, reset timeout and internal pull-up resistors. Moreover, it provides tolerable power-fail (TPF) output and pass-through reset (PTR) indication outputs. Besides, the IC is designed to withstand overvoltage and ESD stresses up to 12V, and provides a low-power sleep mode and adjustable low-power active mode. In addition, its industrial temperature range (-40°C to +125°C) makes it suitable for harsh automotive and industrial applications.

Operation principle of DS1811R-10/T&R supervisor

The supervisor starts working when a power supply voltage is applied to it. It then monitors the voltage level of the power supply and if it falls below the predefined trip point, it turns on the power fail detect (PFD) output. The voltage trip point for PFD can be programmed for any voltage between 4.0V and 6.5V. In the event of a power failure, the PFD output can be used to enable a reset if the voltage does not rise above the predefined reset timeout after the power is restored. After the PFD is reset, the supervisor will also reset the pass-through reset output. The supervisor also includes a reset output which can be used to reset the system in the event of an overvoltage or undervoltage condition. This alarm output has two thresholds which can be programmed for any voltage between 4.0V and 6.5V.In the active mode, the supervisor is designed to remain in a low-power mode, drawing only 1.5µA. This helps to keep the power consumption at a minimum while still providing precise system monitoring and reset features.

Conclusion

DS1811R-10/T&R supervisor is a versatile integrated circuit designed to provide advanced monitoring and system reset features. It is suitable for a wide range of applications, including mobile devices, smart meters and healthcare equipment. It includes various protection features, such as overvoltage and ESD protection up to 12V, and has an adjustable performance mode that reduces power consumption even further. Additionally, its low-power design ensures that the system remains in a low-power sleep mode for extended periods of time. Overall, DS1811R-10/T&R supervisor is a highly efficient and reliable solution for system monitoring and reset applications.

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