MCP1603 datasheet(19/34 Pages) MICROCHIP

Part #	MCP1603

Description	2.0 MHz, 500 mA Synchronous Buck Regulator

PDF	34 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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19 / 34 page

 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.

VIN

SHDN

GND

VFB

VIN

2.7V to 4.5V

VOUT

1.8V @ 500 mA

COUT

4.7 µF

CIN

4.7 µF

4.7 µH

MCP1603 Datasheet(PDF) 19 Page - Microchip Technology