ADM1810-5ART-REEL7

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PMICs (Power Management Integrated Circuits) are special device that are designed to manage a set of power supply rails within a system. They are responsible for providing the accurately regulated power supply voltages and currents, mostly based on a clearclipping of the output load current and protecting the system from the undervoltage and overvoltage conditions. Therefore, the PMICs are often referred to as the power supervisors, meaning the integrated circuits that supervise the power delivery and condition. Among the different kind of power supervisors, the ADM1810-5ART-REEL7 belongs to the group of the voltage supervisors.

When talking about the ADM1810-5ART-REEL7, these devices are particularly designed by Texas Instruments and are in the form of a 5-pin SOT-23 package. They are specifically developed to protect the system from both randomly occurring as well as static over-voltage and under-voltage events. In addition, it is not only preventing the excessive voltage changes from damaging the system, but also monitoring and controlling the active-low reset output.

Moreover, this kind of power supervisor IC utilizes the dielectric isolation to protect the application from the action of harmful input transients and spikes, providing the basic voltage translation from one level to another. Synchronizing the reset output with the failure of any of the monitored power rail supplies, which resulting in an increased safety for the downstream IC, by pulling it to the low state with typical delay of 30ms.

In terms of the operation, the ADM1810-5ART-REEL7 features an internal 2.6V Supervisory Circuit in order to reduce the power consumption and improve the noise performance of the entire device. This IC has two hysteresis versions; one is able to tolerate up to +35Vdc, while others has the hysteresis range of +25Vdc. At its foundation, it has the typical undervoltage throttle of 2.6V, but the adjustable pins are great to set the desired turn-on and turn-off thresholds for further customization.

The working principle of this power supervisor IC is fairly simple, once the power supply supervision is completed, it initates the reset sequence, resetting the system\'s microcontroller and preventing a potential overload of downstream ICs. This reset sequence begins with the internal voltage supervisor which anticipates the voltage decrease for more than 35mV. As soon as the voltage drops, it turns on the logic enable and then the reset time delay starts. This reset time delay duration is determined by the external ceramic capacitor and resistor, resulting in the reset output remaining in the active-low state.

The ADM1810-5ART-REEL7 is great for a wide range of applications, including portables devices such as smartphones, notebooks, as well as various automotive or industrial systems. As mentioned, this power supervisor IC is designed to protect the system from the overvoltage and undervoltage conditions, enabling the system to tolerate the voltage changes and operate properly in almost any conditions.

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