MP2125 – DUAL 1.5A, 1.2MHZ SYNCHRONOURS STEP-DOWN CONVERTER

MP2125 Rev. 1.0

www.MonolithicPower.com

9

12/24/2013

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PCB Layout

PCB layout is very important to achieve stable

operation. Please follow these guidelines and

take Figure3 for references.

The high current paths (GND, IN and SW) should

be placed very close to the device with short,

direct and wide traces. Input capacitors should

be placed as close as possible to the respective

IN and GND pins. The external feedback

resistors shall be placed next to the FB pins.

Keep the switching nodes SW short and away

from the feedback network.

R4

R3

C4

C2

FB1

PVIN1

R2

R1

C1

PVIN2

EN1

N/C

SW2

VIN2

GND1

2

14

13

12

11

10

9

8

1

2

3

4

5

6

7

N/C

EN2

GND2

FB2

VIN1

SW1

L1

L2

C3

VIN1

VOUT1

GND

VIN2

VOUT2

GND

Top Layer

Bottom Layer

Figure 3 -PCB Layout