MP4575

– 5A, 55V, SYNCHRONOUS, STEP-DOWN CONVERTER

MP4575 Rev. 1.0

www.MonolithicPower.com

20

8/16/2016

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PCB Layout Guidelines

Efficient

PCB

layout

is

critical for

stable

operation. For best results, refer to Figure 3 and

follow the guidelines below.

1. Place

the

ceramic

input

capacitor,

especially the small package size (0603)

input bypass capacitor, as close to IN and

GND as possible.

2. Keep the connection of the input capacitor

and VIN as short and wide as possible.

3. Place the VDD capacitor to VDD and GND

as close as possible.

4. Use a large ground plane to directly connect

to GND.

5. Add vias near GND if the bottom layer is a

ground plane.

6. Route SW and BST away from sensitive

analog areas such as FB.

7. Ensure that all feedback connections are

short and direct.

8. Place the feedback resistors as close to the

chip as possible.

9. Connect VIN, SW, and especially GND and

the exposed pad to large copper areas to

cool

the

chip

for

improved

thermal

performance and long-term reliability.

Top Layer

Inner Layer 1

Inner Layer 2

Bottom Layer

Figure 3: Recommended PCB Layout