ROHM recommends a 4-layer PCB with a solid ground plane, and to keep the input and output traces as short as possible. Additionally, it's recommended to use a common mode choke and a 10uF capacitor for input filtering.
To ensure stable output voltage regulation, it's essential to use a suitable output capacitor with a low ESR (Equivalent Series Resistance) and a high ripple current rating. ROHM recommends a 10uF to 22uF ceramic capacitor with an ESR of less than 100mΩ.
Although the datasheet specifies a maximum input voltage of 36V, ROHM recommends limiting the input voltage to 32V to ensure reliable operation and to prevent damage to the internal components.
The output voltage accuracy can be calculated by considering the internal reference voltage tolerance, the resistor tolerance, and the output voltage setting resistor tolerance. ROHM provides a calculation formula in the datasheet, which can be used to determine the output voltage accuracy.
ROHM provides a thermal derating curve in the datasheet, which shows the maximum output current that can be achieved at different ambient temperatures. The curve is based on a junction temperature of 125°C and a maximum output current of 1.5A.
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