MCP1602
DS22061A-page 16 © 2007 Microchip Technology Inc.
5.8 PCB Layout Information
Good printed circuit board layout techniques are
important to any switching circuitry and switching
power supplies are no different. When wiring the high
current paths, short and wide traces should be used.
This high current path is shown with red connections in
Figure 5-1. Therefore, it is important that the
components along the high current path should be
placed as close as possible to the MCP1602 to
minimize the loop area.
The feedback resistors and feedback signal should be
routed away from the switching node and this switching
current loop. When possible ground planes and traces
should be used to help shield the feedback signal and
minimize noise and magnetic interference.
FIGURE 5-1: PCB High Current Path.
SHDN
V
CC
PG
A
GND
V
FB
V
IN
L
X
P
GND
1
2
3
4
8
7
6
5
ON
OFF
MCP1602
V
IN
2.7V to 4.5V
V
OUT
1.5V @ 500 mA
V
IN
R
PULLUP
4.7 µF
4.7 µH
4.7 µF
0.1 µF
10Ω
Processor
Reset
