MP9186 – 20V, 6A SYNCHRONOUS STEP-DOWN CONVERTER

MP9186 Rev. 1.0

www.MonolithicPower.com

14

2/4/2013

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PC Board Layout

This PCB board layout is referring to the

schematic in Figure 8.

Place the high-current paths (GND, IN and SW)

very close to the device with short, direct and

wide traces. The input decoupling capacitor

needs to be placed as close as possible to the

IN and GND pins. The VCC decoupling

capacitor needs to be placed as close as

possible to the VCC pin and multiple VIAs

should be used on both the ground side of the

VCC decoupling capacitor and the GND pins to

connect to the inner and bottom ground plane.

Place the external feedback resistors next to

the FB pin. Keep the switching node SW short

and away from the feedback network.

Top Layer

Bottom Layer

Figure 7: PCB Layout

Design Example

Below is a design example following the

application guidelines for the specifications:

Table 2: Design Example

12V

1V

Io

6A

The detailed application schematic is shown in

Figure 8

. The typical performance and circuit

waveforms have been shown in the Typical

Performance Characteristics section. For more

device applications, please refer to the related

Evaluation Board Datasheets.