DS1831BS

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PMIC or Power Management IC is a semiconductor device used to control multiple supply voltage Rails within a system. It helps to maintain the steady power flow into the system without spikes and dropouts. Supervisors are used to reset, monitor and detect the presence of supply voltages. They have a wide range of applications in telecommunications, consumer electronics, Computers, arcade gaming, medical, industrial and automotive. The DS1831BS is a supervisor chip from Dallas Semiconductor that can monitor and detect system supply voltages. This article explores the application fields of this chip and its working principle.

The DS1831BS operates from a broad input voltage range of 2.0-6.0V and provides a maximum operating temperature of up to 125°C. This feature makes it suitable for applications in low voltage, high temperature conditions. It is a fully integrated supervisor with a dual Power-On Reset (PoR) output stage. It provides multiple levels of precision monitoring for multiple supply voltages. The two reset outputs also provide a glitch and noise immunity to ensure more reliable system operation.

A key feature of this chip is its large operating window. This is useful in providing standby and backup power solutions in embedded applications. The operating windows are typically adjustable and allow the user to configure the monitoring voltages to the desired levels.The main application of the DS1831BS is to monitor and detect supply voltages in systems that use multiple voltage rails. This includes portable and stationary embedded systems that require a clean output signal. It can be used in embedded systems with multiple fixed, real-time and/or time-sensitive supply voltages. Examples include cell phone applications and camera modules.

The DS1831BS has two independent reset outputs. This makes it suitable for low voltage applications, where the media voltage may drop below the minimum required reset voltage. The chip will detect the drop in voltage and reset the system after detecting the threshold voltage. This ensures that the system is correctly monitored and reset in a timely manner.

The working principle of the DS1831BS is straightforward. The chip consumes only 3μA of supply current and utilizes an internal voltage regulator to regulate the internal core voltage. The chip then monitors the external supply voltages and provides a logic-level reset to the system if the voltage drops below the specified threshold level. If the threshold is not met, the chip will continue to monitor the external voltages until it reaches the correct level and then provide a reset signal to the system.The DS1831BS can also be used to ensure valid power-up and correct operational parameters. It has a built-in transistor switch that will turn on the power supply if the external power supply fails. This ensures that the system is not damaged due to incorrect power. The DS1831BS can be used in a variety of applications where supply voltage monitoring and detection of reset signals is required. It is a low power, reliable and accurate device that can provide reliable and fast voltage monitoring and reset signals. It offers flexibility and is suitable for use in low voltage, high temperature applications.

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