STMicroelectronics provides a recommended PCB layout in the application note AN5046, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
The input capacitor values depend on the input voltage, output voltage, and switching frequency. A general guideline is to use a capacitor with a capacitance value between 10uF to 22uF, and a voltage rating of at least 1.5 times the input voltage. Consult the application note AN5046 for more detailed guidance.
The maximum allowed voltage drop across the internal FETs is not explicitly stated in the datasheet. However, as a general rule, it's recommended to keep the voltage drop below 1V to ensure reliable operation and minimize power losses.
The STB19NB20 is rated for operation up to 150°C, but the device's performance and reliability may degrade at high temperatures. It's essential to consider the thermal management and ensure the device operates within the recommended temperature range to maintain its performance and lifespan.
To troubleshoot issues with the STB19NB20, start by verifying the PCB layout, component values, and input/output voltage levels. Check for any signs of overheating, and ensure the device is properly decoupled. Consult the application note AN5046 and the datasheet for guidance on troubleshooting common issues.
STB19NB20 datasheet
by STMicroelectronics
