ISL6753AAZA-T

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ISL6753AAZA-T is a type of DC-DC switching controller for voltage regulators, designed and manufactured by Intersil Corporation. This family of controllers provides high power density, high efficiency and low system-level cost solutions for virtually any AC or DC input voltage and any desired output voltage. ISL6753AAZA-T offers enhanced features such as single-bit digital Control Interface, voltage-mode control, maximum duty cycle adjust, and excellent EMI performance.

ISL6753AAZA-T can be used in various applications where there is a need for a compact & efficient voltage regulator. The controller comes with the integrated protection for the current-mode control and over-voltage protection for the output voltage. Furthermore, it provides synchronous rectification mode and features such as slope compensation and soft-start. ISL6753AAZA-T can be used for numerous applications such as voltage sequencing, DC/DC converter design, power management, and many other applications where a constant and accurate output voltage is required.

In terms of working principle, ISL6753AAZA-T uses voltage-mode control and is capable of supplying up to 5A of output current. It uses an external reference voltage, which is then regulated by the controller to the desired output voltage. Under the voltage-mode control, the conversion cycle is initiated when the particular DC-DC converter application is enabled. When the enable signal is active, the controller samples the output voltage, compares it to the reference voltage and then controls the converter’s duty cycle accordingly. This closed loop control of the duty cycle ensures that the output voltage remains within the specified range.

ISL6753AAZA-T can operate over a wide range of conditions, such as over-voltage, under-voltage and minimum on-time, to ensure that the conversion process remains safe and reliable. The device also has a built-in current limit protection, which works by sensing the current through a sense resistor and then limiting the on-time of the converter. In the case of an overloaded output, the off-time of the converter will increase, limiting the current and thus preventing any damages.

Overall, ISL6753AAZA-T proves to be a reliable & efficient switching controller for voltage regulators as it can operate in both DC and AC applications and comes with an integrated protection feature. With its compact design, the controller is perfect for applications where there’s a need for a high power density, high efficiency, and low system-level cost solutions.

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