TI recommends placing the input capacitor as close as possible to the IC pins PVIN and PGND.
The VOS connection is noise sensitive and needs to be routed as short and directly to the output pin of the inductor.
The exposed thermal pad of the package, analog ground (pin 6) and power ground (pin 14, 15) should have a single joint connection at the exposed thermal pad of the package. This minimizes switch node jitter.
The charge pump capacitor connected to CP and CN should be placed close to the IC to minimize coupling of switching waveforms into other traces and circuits.