Texas Instruments recommends a 2-layer or 4-layer PCB with a solid ground plane on the bottom layer to improve thermal performance. Additionally, placing thermal vias under the device and using a thermal pad can help to dissipate heat more efficiently.
To ensure reliable operation at high temperatures, it's essential to follow the recommended operating conditions, including the maximum junction temperature (TJ) of 150°C. Also, consider using a heat sink, thermal interface material, and ensuring good airflow around the device.
The recommended input capacitor value is 10uF to 22uF, with a low ESR (Equivalent Series Resistance) and a voltage rating of at least 25V. X5R or X7R ceramic capacitors are suitable for this application.
To minimize EMI, use a shielded inductor, keep the switching node (SW) as short as possible, and use a common-mode choke or ferrite bead on the input lines. Additionally, ensure good PCB layout practices, such as separating analog and digital grounds, and using a solid ground plane.
The recommended output capacitor value is 10uF to 47uF, with a low ESR and a voltage rating of at least 10V. X5R or X7R ceramic capacitors are suitable for this application. It's also recommended to use a capacitor with a low ESL (Equivalent Series Inductance) to minimize ringing.
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LV3842XFDBVR 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.
