Richtek provides a recommended PCB layout in their application note AN-101, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
Richtek recommends using an inductor with a saturation current rating of at least 2x the maximum output current, and a DC resistance (DCR) of less than 100 mΩ. The inductor value should be chosen based on the output voltage, output current, and switching frequency.
The maximum junction temperature (Tj) for the RT9428WSC is 150°C. However, it's recommended to keep the junction temperature below 125°C for reliable long-term operation.
Yes, the RT9428WSC can be used with high input voltages, but it's essential to ensure that the input voltage does not exceed the maximum rating of 60V. Additionally, the designer should consider the power dissipation and thermal management of the device.
Richtek provides a troubleshooting guide in their application note AN-102, which covers common issues and their solutions. Additionally, designers can use simulation tools and oscilloscope measurements to identify and debug issues.
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