Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as keeping the input and output traces separate, using a solid ground plane, and minimizing parasitic inductance. Additionally, ensure the PCB is designed to handle the high-frequency switching of the converter.
When selecting an inductor, consider the inductor's saturation current, DC resistance, and self-resonant frequency. The PUCC21750DW datasheet provides guidelines for inductor selection, but you may need to consult the inductor manufacturer's datasheet for specific information. A good starting point is to choose an inductor with a saturation current rating above the peak current of the converter.
The PUCC21750DW has an absolute maximum input voltage rating of 28V, but the recommended operating input voltage range is 4.5V to 18V. Exceeding the absolute maximum rating can damage the device.
To ensure the PUCC21750DW operates within its thermal limits, follow the thermal design guidelines in the datasheet, such as providing adequate heat sinking, using a thermal pad, and keeping the device away from heat sources. Monitor the device's junction temperature (TJ) and ensure it stays below the maximum rating of 150°C.
The EN (enable) pin is used to enable or disable the PUCC21750DW. When the EN pin is high, the device is enabled, and when it's low, the device is disabled. You can use the EN pin to implement power sequencing, shutdown, or low-power modes in your design.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
