Richtek provides a recommended PCB layout in their application note ANI-23, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
The input capacitor selection depends on the input voltage, output voltage, and output current. Richtek recommends using a low-ESR capacitor with a value between 10uF to 22uF, and a voltage rating of at least 1.5 times the input voltage. Refer to the application note ANI-24 for more details.
The maximum allowed voltage on the EN (enable) pin is 6V. Exceeding this voltage may damage the device. It's recommended to use a voltage divider or a buffer circuit to ensure the EN pin voltage remains within the specified range.
To ensure the device operates within the specified junction temperature range (TJ), follow the recommended thermal design guidelines, use a heat sink if necessary, and monitor the device's temperature using the thermal monitoring pin (TMP).
Richtek recommends using a low-ESR ceramic capacitor with a value between 10uF to 47uF, and a voltage rating of at least 1.5 times the output voltage. The output capacitor selection depends on the output voltage, output current, and desired ripple voltage.
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