Datasheet
Table Of Contents
- 2.0 MHz, 500 mA Synchronous Buck Regulator
- Package Types
- Typical Application Circuit
- Functional Block Diagram
- 1.0 Electrical Characteristics
- 2.0 Typical Performance Curves
- 3.0 Pin Descriptions
- 4.0 Detailed Description
- 5.0 Application Information
- 6.0 Typical Application Circuits
- 7.0 Packaging Information
- Appendix A: Revision History
- Product Identification System
- Trademarks
- Worldwide Sales and Service
2007-2012 Microchip Technology Inc. DS22042B-page 19
MCP1603/B/L
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. The current in this path is switching.
Therefore, it is important that the components along the
high-current path should be placed as close as possi-
ble to the MCP1603 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.
V
IN
SHDN
GND
V
FB
L
X
V
IN
2.7V to 4.5V
V
OUT
1.8V @ 500 mA
C
OUT
4.7 µF
C
IN
4.7 µF
L
1
4.7 µH