DS1811R-5+T&R

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PMIC - Supervisors refers to Integrated Circuit Supervisor devices, which have multiple functions to monitor system operations and detect faults.
The DS1811R-5+T&R is a supervisor device from Maxim Integrated specifically designed for industrial applications.
The device family includes the DS1811-5+, the DS1811R-5+T, the DS1812R-5+T and the DS1814R-5+T, ranging from a single voltage monitor to a dual voltage and reset supervisor.

Features of the DS1811R-5+T&R

• Extremely low operating current of 10.5uA at operating frequency/temperature
• Wide operating voltage range of 2V to 5.5V and reset thresholds of 1.63V to 4.7V
• Independent timing of the reset and threshold signals
• Very fast response time of 1 us for the reset output and 2 us for the threshold output
• Hysteresis on both reset and threshold pins
• Unique current-source output structure
• Advanced reset control with two options: manual control or internal reset initiation
• Dual watchdog timer

Application Field and Working Principle

The DS1811R-5+T&R is particularly suitable for industrial applications such as HVAC, automotive, automation, and renewable energy due to its high level of integration and its ability to monitor and control multiple signals. Its current-source output structure gives it the ability to interface easily with other ICs, thus providing a highly efficient and robust system. It is also suitable for industrial applications that require precise power-on reset and power-monitoring control.
The main function of the DS1811R-5+T&R is to monitor voltages and to initiate a reset when the voltage level exceeds a predetermined threshold. It also has an internal watchdog timer which can be used to detect system reset events. In addition to its voltage monitoring and reset functions, the device has integrated features that enable it to detect power supply faults and thermal runaway events.

The DS1811R-5+T&R is implemented using a voltage monitor and reset controller that has a hysteresis buffer which allows for both high and low thresholds. The hysteresis allows the voltage monitor and reset controller to generate a reset if the input voltage moves out of the preset range. The device has two outputs, an integrated active-LOW reset and an integrated active-HIGH threshold, which can be programmed to either trigger or disable reset signals based on the voltage level.

The device has a dual watchdog timer which is used to reset the system in the event of a system hang or to initiate a system reset when the voltage level is within the threshold range. The watchdog timer can be programmed with a programmable time interval after which it will generate a reset signal.

The device also has an integrated circuit temperature sense circuit that can detect thermal runaway events. The thermal detection circuit monitors the temperature of the IC and triggers a reset when the temperature rises above the preset level.

The integrated current-source output structure also helps in providing robustreset and threshold signals. The device has a unique current-sensing circuit which monitors the output current to ensure that it is within the safe limits for the output pins. This allows for reliable operation even in harsh environments.

In summary, the DS1811R-5+T&R is a highly integrated supervisor device from Maxim Integrated, specifically designed for industrial applications. It provides accurate voltage monitoring, reset control and thermal sensing for safe system operations. The device has a very low operating current, wide operating voltage range, independent reset and threshold timing, hysteresis on reset and threshold pins, advanced reset control with two options, dual watchdog timer and an integrated current-source output structure. Thus, it is an ideal choice for a variety of industrial applications.

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