ISL6439IRZ

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The ISL6439IRZ is a high-performance, high-efficiency DC-DC switching controller that is optimized for direct, point-of-load (POL) current sourcing or sinking applications. It enables stable and reliable power delivery in a variety of environments and has been designed to meet demanding system requirements. It integrates a number of features, such as digital current-mode control, adjustable-voltage feedback (VFB) control loop, and adjustable frequency synchronization for maximum system flexibility and performance.

The ISL6439IRZ is ideally suited for applications such as direct POL current sourcing, POL current sinking, and POL voltage regulation systems. It can be used to deliver steady power with minimum external components while remaining compact and efficient. It is particularly suitable for use in narrow or low profile PC or workstation motherboards that lack space for large power components.

The ISL6439IRZ provides an adjustable output voltage from 100mV to 1.5V, a programmable output current of 1A to 4A, and adjustable output frequency from 25kHz to 600kHz. It also features an adjustable feed-forward voltage loop that can be used to compensate for changes in output voltage. The integrated control loop allows for precise current regulation control and provides high-bandwidth operation.

The ISL6439IRZ accepts a 5V input voltage and can be configured to operate from either a single-ended or dual-symmetric power supply rail. It is available in a space-saving, 16-pin Thin Quad Flat No-Lead (TQFN) package. It also features an integrated shutdown mode that allows the user to shut down the device when not in use to reduce power consumption.

In order to ensure efficient and reliable operation, the ISL6439IRZ implements in-system monitoring and protection functions such as over-voltage protection (OVP), under-voltage protection (UVP), overtemperature protection (OTP), and programmable output current limiting. The device also features an integrated thermal monitoring system that provides a warning signal when the ambient temperature drops beyond a certain threshold.

The ISL6439IRZ is designed for use in a wide range of industrial and consumer applications, such as tablet computers, notebooks, server and storage systems, peripheral cards, battery-powered devices, and medical equipment. It is also suitable for use in automotive, aviation, and military applications. With its wide input voltage range, precise current regulation, and robust protection features, the ISL6439IRZ provides a compact and efficient solution for demanding system requirements.

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