A good PCB layout for the UCC27201ADRMR involves keeping the high-frequency switching nodes (e.g., SW and VIN) away from sensitive analog nodes, using a solid ground plane, and minimizing trace lengths and loops. TI provides a recommended layout in the datasheet and application notes.
Choose an input capacitor with a low ESR, high ripple current rating, and a voltage rating that exceeds the maximum input voltage. A wrong choice can lead to increased noise, reduced efficiency, and even damage to the device.
The maximum allowable voltage drop across the internal FETs is approximately 1.5V. Exceeding this can reduce efficiency, increase heat generation, and affect reliability. Ensure that the input voltage and output current are within the recommended operating range.
Ensure good thermal conduction by using a heat sink, thermal interface material, and a PCB with a solid ground plane. Keep the device away from heat sources, and avoid blocking airflow around the device. Monitor the junction temperature (TJ) and adjust the design accordingly.
Choose an output inductor with a high saturation current rating, low DCR, and a suitable core material. Select an output capacitor with a high capacitance, low ESR, and a voltage rating that exceeds the output voltage. Ensure the LC filter is properly designed to minimize ripple and noise.
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UCC27201ADRMR Overview
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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.
