Microchip Technology ARD00386 Data Sheet
2011 Microchip Technology Inc.
DS22234B-page 17
MCP1640/B/C/D
The feedback resistors and feedback signal should be
routed away from the switching node and the switching
current loop. When possible, ground planes and traces
should be used to help shield the feedback signal and
minimize noise and magnetic interference.
routed away from the switching node and the 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:
MCP1640/B/C/D SOT23-6 Recommended Layout.
FIGURE 5-2:
MCP1640/B/C/D DFN-8 Recommended Layout.
C
OUT
L
C
IN
+V
IN
GND
GND
+V
OUT
Via to GND Plane
MCP1640
Via for Enable
R
TOP
R
BOT
1
C
OUT
L
C
IN
+V
IN
GND
+V
OUT
MCP1640
Enable
R
TOP
R
BOT
GND
Wired on Bottom
Plane
Plane
1