Diodes AP3432 - Manual (Page 15)

Data Sheet
1.5MHz, 2.5A, Step-down DC-DC Converter AP3432
Jun. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
15
Application Information (Continued)
performance of AP3432.
1. The power traces, including the GND trace, the SW
trace and the VIN trace should be kept direct, short and
wide.
2. Put the input capacitor as close as possible to the
VIN_SW, VIN_A and GND pins.
3. The FB pin should be connected directly to the
feedback resistor divider.
4. Keep the switching node SW away from the
sensitive FB pin and the node should be kept small
area.
The following is an example of 2-layer PCB layout as
shown in Figure 32 and Figure 33 for reference.
Figure 31. The Evaluation Board Schematic
Figure 32. Top Layer for Demo Board Figure 33. Bottom Layer for Demo Board