MP8904 –500mA LINEAR REGULATOR

MP8904 Rev. 1.02

www.MonolithicPower.com

9

6/6/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

PCB layout guide

PCB layout is very important to achieve good

regulation, ripple rejection, transient response

and

thermal

performance.

For

optimal

performance, duplicate the EVB layout from

Figure 3.

For any changes, follow the guidelines below:

1) Place the input and output ceramic bypass

capacitors close to their respective IN and

OUT pins.

2) Use short and direct feedback connections.

Place

the

feedback

resistors

and

compensation components as close to the

chip as possible.

3) Connect IN, OUT and GND to large copper

surfaces to help cool the chip to improve

thermal performance and long-term reliability.

MP8904

4

6

8

5

OUT

FB

GND

EN

PG

IN

R1

R3

R2

C1

C2

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

Figure 3: PCB Layout, Top Layer