Description:The ISL91302B is a highly efficient, dual or single output, synchronous multiphase buck switching regulator that can deliver up to 5A per phase continuous output current. The ISL91302B features four integrated power stages and has the capability to assign its power stages to either output. This flexibility allows seamless design-in for a wide range of applications where dual, triple, or quad phase outputs are needed, such as CPU and GPU core power mobile applications. The ISL91302B features integrated low O
A good PCB layout for the ISL91302BIIZ-T involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the traces between the IC and the capacitors. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure the stability of the output voltage, it's essential to choose the right output capacitor value and type. A minimum capacitance of 10uF is recommended, and the capacitor should have a low ESR (Equivalent Series Resistance) to minimize voltage ripple. Additionally, the output voltage can be stabilized by adding a small ceramic capacitor (e.g., 1uF) in parallel with the main output capacitor.
The ISL91302BIIZ-T can handle a maximum input voltage of 5.5V. Exceeding this voltage may damage the IC. It's essential to ensure that the input voltage is within the recommended range to ensure reliable operation.
The ISL91302BIIZ-T is a programmable voltage regulator, and the output voltage can be programmed using an external resistor divider network. The output voltage is determined by the ratio of the resistors in the divider network. The datasheet provides a formula to calculate the required resistor values for a specific output voltage.
The thermal shutdown temperature of the ISL91302BIIZ-T is typically around 150°C. When the junction temperature exceeds this value, the IC will shut down to prevent damage. The thermal shutdown is an automatic protection feature that helps prevent overheating and ensures reliable operation.
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ISL91302BIIZ-T Overview
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