ISL61853AIRZ-T

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PMIC, otherwise known as Power Management Integrated Circuits, are integrated circuits (ICs) that manage the power supply and the systems onboard the device they are connected to. PMICs are designed to commercialize the power electronics requirement of any given device.

Hot Swap Controllers are now a specific branch of PMICs which have emerged to help manage and monitor the power flow in high power applications. These Controllers are designed to handle high amounts of power with precision and reliability so that devices can be swapped or replaced without any power loss.

ISL61853AIRZ-T is one such Controller which is specifically designed for Hot Swap applications that require a large amount of reliable power control. This chip excels in high power AC/DC, ATX, DC/DC and dual-supply applications. It is a 3.3V controller equipped with unique features such as adjustable ramp rate, adjustable under-voltage lockout, inrush current limiting, and overtemperature protection.

The working principles of the ISL61853AIRZ-T is fairly straightforward. It is designed in a way which allows continuous operation during Hot Swap and USB surge events. It achieves this by using a two-level control system which isolates the equipment being added to the supply, preventing any voltage surges and limiting inrush current.

The chip is designed to detect load current and adjust the output voltage accordingly. It also features a variable hysteretic control loop to regulate the output voltage in line with the input voltage and load current. This feature allows the controller to operate smoothly and reliably, regardless of load changes.

The ISL61853AIRZ-T also features an Active On/Off function which makes system powering off and on extremely easy. This feature allows the controller to be triggered just by simply pressing the On/Off button. The device also includes an OVP monitor which can detect any potential over-voltage conditions, ensuring system reliability.

In short, the ISL61853AIRZ-T, is a robust and innovative hot-swap controller which excels in high power AC/DC, ATX, DC/DC and dual-supply applications. It features a two-level control system, adjustable ramp rate, adjustable under-voltage lockout, Active On/Off function and OVP monitor, all wrapped up in an industry leading 3.3V controller.

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