ISL8118IRZ

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The ISL8118IRZ DC-DC Switching Controller provides an innovative, cost-effective solution for commercial and consumer computing and embedded applications needing high efficiency Synchronous Buck switching power supplies, such as those for microprocessors, GPUs, and other power-hungry components. In these applications, the ISL8118IRZ offers high efficiency, accurate current sensing and control, a programmable switching frequency, and superior thermal characteristics in a small, low-cost package.

The ISL8118IRZ utilizes two internal PWM (pulse width modulated) switches. The switch nodes are externally tied to two power supply rails—Vin, the input voltage, and Vout, the output voltage. The ISL8118IRZ monitors the output voltage of the power supply and adjusts its switching frequency and duty cycle accordingly.

The first step in the ISL8118IRZ configuration is to select the necessary feedback components for the desired output voltage. This is done by applying the desired voltage to the voltage feedback pin (Pin 4) and the corresponding current to the current feedback pin (Pin 3). Once the feedback components are set, the PWM switches are turned on and the voltage feedback circuit determines the output voltage level.

The ISL8118IRZ also includes a host of features that further enhance its performance and ease of use. The integrated loop compensation circuitry eliminates the need for external compensation components, simplifying design and saving board space. Additionally, the ISL8118IRZ includes a programmable current limit feature. This feature allows the designer to set the maximum output current of the system, providing protection against overload conditions.

The ISL8118IRZ also features frequency synchronization to reduce EMI generation. The device can synchronize to an external clock frequency, allowing the designer to optimize system performance by synchronizing multiple controllers with one clock source. Furthermore, the device supports both voltage mode and current mode control for further flexibility.

The ISL8118IRZ is the ideal choice for microprocessor, GPU, and other power-hungry applications. It features high efficiency, integrated current sensing and control, programmable switching frequency, and a small package size, making it an ideal solution for many applications. Additionally, the device\'s integration of feedback components and loop compensation circuitry simplifies design and reduces BOM costs.

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