AX3702

PCB Layout Recommendations

When laying out the printed circuit board, the following checking should be used to

ensure proper operation of the AX3702. Check the following in your layout:

1. The power traces, consisting of the GND trace, the SW trace and the VIN trace should be

kept short, direct and wide.

2. Does the (+) plates of CIN connect to VIN as closely as possible. This capacitor provides

the AC current to the internal power MOSFETs.

3. Keep the switching node SW away from the sensitive VOUT node.

4. Keep the (-) plates of CIN and COUT as close as possible.

AX3702

1

2

3

4

5

VIN

FB

EN GND SW

C1

R2

R1

C2

C3

L1

Net VIN

Net VIN

VIN

VOUT

GND

GND

AX3702

1

2

3

NC

PGND

VIN

PGND SW

C1

R2

R1

C2

C3

L1

VIN

VOUT

GND

GND

10

9

8

EN

4

5

FB

NC

SW SGND

7

6

AX3702

1

2

3

NC

PGND

VIN

SW

NC

C1

R2

R1

C2

C3

L1

VIN

VOUT

GND

GND

8

7

6

EN

4

SGND

FB

5

9/22

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Rev1.4 Sep.30, 2021