Place the decoupling capacitors as close as possible to the device.
Connect the BPCAP decoupling capacitors as close as possible to pin D6.
MARGIN pins output PWM signals that have fast-edges. Route these signals away from sensitive analog signals. It is a good practice to place resistor R4 and capacitor C1 (as shown in Figure 22) as close as possible to the MARGIN pin, minimizing the propagation distance of the fast-edge PWM signals on the PCB.
Resistor R3 can be placed near the power supply feedback node to isolate the feedback node from noise sources on the PCB. If resistor R4 and capacitor C1 cannot be located close to the MARGIN pin, add a termination resistor in series with a value between 20-Ω and 33-Ω. Locate it near the MARGIN pin.