MP2362 — DUAL 2A, 23V, 380KHZ STEP-DOWN CONVERTER

MP2362 Rev. 0.93

www.MonolithicPower.com

9

1/25/2010

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© 2010 MPS. All Rights Reserved.

PCB Layout Guide

PCB layout is very important to achieve stable

operation. Please follow these guidelines and

take Figure3 for references.

1) Keep the path of switching current short and

minimize the loop area formed by Input cap,

high-side MOSFET and schottky diode.

2) Keep the connection of schottky diode

between SW pin and input power ground as

short and wide as possible.

3) Ensure all feedback connections are short

and direct. Place the feedback resistors and

compensation components as close to the

chip as possible.

4) Route SW away from sensitive analog areas

such as FB.

5) Connect IN, SW, and especially GND

respectively to a large copper area to cool

the chip to improve thermal performance and

long-term reliability.

L1A

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

SYNCA

NC1

BSA

INA

SWA

PGA

SGA

FBB

COMPB

ENB

ENA

COMPA

FBA

SGB

PGB

SWB

INB

NC2

BSB

SYNCB

PGND

PGND

L1A

D1B

C2B

R1A

C1B

D1A

C2A

C1A

R2A

R4A

C5A

R3A

C3A

C6A

R4B

R1B

R2B

R3B

C3B

C6B

C5B

Top Layer

SGND

Bottom Layer

Figure3―PCB Layout