The pinout of the TPS62843 has been optimized to enable a single top layer PCB routing of the IC and its critical passive components such as CIN, COUT, and L. Furthermore, this pinout allows the user to connect tiny components such as 0201 (0603 Metric) size capacitors and 0402 (1005 Metric) size inductors. A solution size smaller than 5mm² can be achieved with a fixed output voltage. As for all switching power supplies, the layout is an important step in the design. Care must be taken in board layout to get the specified performance. Providing a low inductance, low impedance ground path is critical. Therefore, use wide and short traces for the main current paths. Place the input capacitor as close as possible to the VIN of the IC and GND pins. This placement is the most critical component placement. The VOS line is a sensitive, high impedance line and must be connected to the output capacitor and routed away from noisy components and traces (for example, the SW line) or other noise sources.