RT7258
SW should be connected to inductor by
wide and short trace. Keep sensitive
components away from this trace.
Input capacitor must be placed
as close to the IC as possible.
V
IN
GND
The EN/SYNC must be kept
C
C
IN
OUT
away from noise. The trace
should be short and shielded
with a ground trace.
Q1
L
BG
SW
8
7
6
5
VIN
V
OUT
C
BOOT
2
3
4
BOOT
VCC
BG
GND
R1
EN/SYNC
FB
C
capacitor must
be placed as close to
the IC as possible.
VCC
GND
9
V
OUT
GND
R2
C
VCC
The feedback components
must be connected as close
to the device as possible.
GND
Figure 9. PCB Layout Guide for SOP-8 (Exposed Pad)
The feedback components
GND
must be connected as close
to the device as possible.
C
capacitor must
VCC
R2
FB
be placed as close to
the IC as possible.
V
OUT
R1
14
1
2
3
4
5
6
7
GND
R3
13
V
BG
PGOOD
C
VCC
CC
GND
V
12
11
EN/SYNC
VCC
BOOT
VIN
GND
SW should be connected
The EN/SYNC must be kept
away from noise. The trace
C
L
BOOT
10 SW
IN
VIN
VIN
NC
to inductor by wide and
short trace. Keep sensitive
components away from
this trace.
9
SW
should be short and shielded
with a ground trace.
V
OUT
C
15
IN
8
SW
BG
Q1
C
OUT
Input capacitor must be
placed as close to the
IC as possible.
GND
Figure 10. PCB Layout Guide for WDFN-14L 4x3
Copyright 2012 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
16
DS7258-00 January 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
