R3
C8
R12
R15
C10
R10
C11
D2
C14
C2
L1
+
C9
R4
C5
R2
C6
R17
+
C4
C1
R11
Q1
R16
+
C3
V
IN
Q3
HG
BOO
T
LG
PGND
FB
PWGD
FREQ/SYNC
SS/TRACK
SGND
EAO
PGND
LM2745
V
OUT
LM2937
V
IN
C13
V
OUT
GND
C12
D1
Q2
SD
R6
R5
R7
R8
R9
R18
U1
U2
C7
SYNC
R14
R13
TRACK
SJ2
PWGD
SD
TRIM
SENSE
SJ1
V
CC
I
SEN
PCB Layout
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Figure 11. 300 kHz Demo Board Schematic
9
PCB Layout
Figure 12. Top Silkscreen
8
AN-1573 LM2745-19A Demonstration Board
SNVA213A – May 2007 – Revised May 2013
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