The pinout of the TPS6286x converter has been optimized to enable a single top layer PCB
routing of the converter and its critical passive components such as CIN, COUT, and
L. This pinout allows the connection of tiny components such as 0201 (0603) size
capacitors and 0402 (1005) size inductor. A design size smaller than 5
mm2 can be achieved with a fixed output voltage.
- As for all switching power supplies, the layout is an important step in the
design. A specified performance requires the correct on board layout.
- Provide a low inductance, low impedance ground path. Therefore, use wide and
short traces for the main current paths.
- Place the input capacitor as close as possible to the VIN and GND pins of the
converter. This 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, SW line) or other noise sources.