MP3383

– 4-STRING, MAX 80V VOUT, STEP-UP WLED CONTROLLER

MP3383 Rev. 1.0

MonolithicPower.com

18

5/2/2022

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PCB Layout Guidelines

Efficient

PCB

layout

is

critical

for

stable

operation and reducing EMI noise. For the best

results, follow the guidelines below and refer to

Figure 2:

1. Ensure that the loop between the external

MOSFET, output diode, and ceramic COUT is

as small and short as possible since it carries

a high-frequency pulse current.

2. Separate the power ground (PGND) and

signal

ground

(GND)

to

reduce

noise

affection.

3. Connect PGND and GND together. All logic

signals refer to the signal ground.

4. Place ceramic capacitors as close to VIN and

VCC as possible.

Figure 2: Recommended PCB Layout