MP1660

– SYNCHRONOUS STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

MP86953 Rev. 1.0

www.MonolithicPower.com

14

6/9/2020

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PCB Layout Guidelines

Efficient PCB layout of the switching power

supplies is critical for stable function. Poor

layout design can result in poor line or load

regulation and stability issues. For the best

results, refer to Figure 5 and follow the

guidelines below:

1. Place the high-current paths (GND, VIN,

and SW) very close to the device with short,

direct, and wide traces.

2. Place the input capacitor as close to VIN

and GND as possible (within 1mm).

3. Place the external feedback resistors next

to FB.

4. Keep the switching node (SW) short, and

route it away from the feedback network.

VIN

OUT

GND

GND

Top Layer

GND

VOUT

Bottom Layer

Figure 5: Recommended PCB Layout