VIN and VOUT traces must be as short and wide as possible to accommodate for high current.
The VIN pin must be bypassed to ground with low ESR ceramic bypass capacitors. The typical recommended bypass capacitance is 1-μF ceramic with X5R or X7R dielectric. This capacitor must be placed as close to the device pins as possible.
The VOUT pin must be bypassed to ground with low ESR ceramic bypass capacitors. The typical recommended bypass capacitance is one-tenth of the VIN bypass capacitor of X5R or X7R dielectric rating. This capacitor must be placed as close to the device pins as possible.