MP20042 datasheet(8/9 Pages) MPS

8 / 9 page

MP20042-DUAL, LOW NOISE, HIGH PSRR, 200mA LINEAR REGULATOR

MP20042 Rev. 0.9

www.MonolithicPower.com

9/28/2009

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

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 ? 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.

EN2

EN1

OUT2

OUT1

GND

OUT2

OUT1

EN2

MP20042

CIN

COUT2

COUT1

Top Layer

Figure 5—PCB Layout

MP20042 Datasheet(PDF) 8 Page - Monolithic Power Systems