A 4-layer PCB with a solid ground plane and thermal vias is recommended. The RT8008GB's thermal pad should be connected to the ground plane using multiple thermal vias to ensure efficient heat dissipation.
To ensure stable output voltage regulation, it is recommended to use a minimum output capacitance of 10uF with an ESR of 1ohm or less. Additionally, the input capacitor should be placed as close to the VIN pin as possible.
Although the datasheet specifies a maximum input voltage of 18V, it is recommended to limit the input voltage to 15V to ensure reliable operation and prevent damage to the device.
The output voltage accuracy can be calculated using the formula: Vout = (Vref x (1 + R1/R2)) + (Vref x (R1/R2) x (ΔVref/Vref)), where Vref is the internal reference voltage, R1 and R2 are the feedback resistors, and ΔVref is the tolerance of the internal reference voltage.
A soft-start time of 1-2ms is recommended to prevent inrush currents and ensure a stable output voltage during startup.
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