11.1 Layout Guidelines
The TPS62840 pinout has been optimized to enable a single layer PCB routing of the device and its critical passive components such as CIN, COUT, and L.
- 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.
- It is critical to provide a low inductance, low impedance ground path. Therefore, use wide and short traces for the main current paths.
- The input capacitor must be placed as close as possible to the VIN and GND pins of the device. 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, the SW line) or other noise sources.