MP2002 – LOW INPUT VOLTAGE, 500mA LINEAR REGULATOR

MP2002 Rev. 1.11

www.MonolithicPower.com

9

10/10/2011

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PCB Layout Guide

PCB layout is very important to achieve good

regulation, ripple rejection, transient response

and

thermal

performance.

It

is

highly

recommended to duplicate EVB layout for

optimum performance.

If change is necessary, please follow these

guidelines and take Figure 2 for reference.

1) Input and output bypass ceramic capacitors

are suggested to be put close to the IN Pin

and OUT Pin respectively.

2) Ensure all feedback connections are short

and direct. Place the feedback resistors and

compensation components as close to the

chip as possible.

3) Connect IN, OUT and especially GND

respectively to a large copper area to cool

the chip to improve thermal performance and

long-term reliability.

MP2002

OUT

FB

GND

8

5

3

1

4

6

IN

EN

PG

1.8V

C2

C3

C1

R1

R2

PG

R3

IN

C3

C1

OUT

GND

R3

PG

NC

EN

FB

GND

NC

IN

OUT

6

7

8

1

2

3

4

5

C2

R1

R2

Top Layer

Bottom Layer

Figure 2—PCB Layout