Schematic Diagrams; Figure 16. Vin; Figure 17. Vin - STMicroelectronics STEVAL-L3751V12 User Manual

10

Schematic diagrams

EM I Fi l t er
R25 0
FS1 L5 NC
VIN
C18 C20
C19
10nF 10uF
10uF
FS2
PGND
J5
1
VCC
2
SY NCIN
3 AGND
4 SY NCOUT
5
PGOOD
6 TRIM
7 AGND
8
SS/TRK
9 EN/UVLO
10 AGND
Strip 10
Figure 29. STEVAL-L3751V12 circuit schematic
I NPUT DECOUPLI NG
R18 NC
L2
2 1 VIN
8.2uH
+ C30 C53 C21
100uF
10uF 10uF
R1
2.2
C1
0.1uF
U1
VCC 14 17 BST
VCC BST
C3
R8 R7 0
1uF 20k 20k
PGOOD 10
100nF
PGOOD 18
HO
R9 HO
SY NCIN 8
SY NCIN
200k 19 SW
SW
11 ILIM
ILIM
EN/UVLO 1
EN/UVLO
SY NCOUT 7 13 LO
SY NCOUT LO
3
SS/TRK
SS/TRK
12
PGND
RT 2
RT 4
COMP
COMP
R19 R20 R10
18k
20k C54 46.4k
47nF
AGND 6 5 FB
AGND FB
L3751
C22 C23 C24 C25 C26 C27 C28 C29
10uF 10uF 10uF 10uF 10uF 10uF 10uF 10uF
D2 BAT46-SOD-323
VCC C33
R22
10nF
QH
HS 4
C2
0 STL90N10F7
R3
R5 510 D1
R15
STPS6M100DEE
C5 2R2
15pF
QL
LS
4
STL110N10F7
C15
100pF
C52 R14
R16 1800pF 180
6k65
C17 C16 13k3 0
VoutS
150pF 5600pF
R13 R12 R11
2k49
Com pesat i onLoop PGNDs
R21
K* 0. 8=Vout
1k5
K=1+( ( R11+R12/ / R21) / R13)
OUTPUT DECOUPLI NG TOP
C6 C7 C8 C9 C10 C11 C12
10uF 10uF 10uF 10uF 10uF 10uF 10uF
TO P
OUTPUT DECOUPLI NG TOP
C34 C35 C36 C37 C38 C39 C40 C41 C42
10uF 10uF 10uF 10uF 10uF 10uF 10uF 10uF 10uF
BO TTO M
L4
ZC1818-822
L3
NC
Vout
L1 FS4
NC
Vout
0 R23
C32 R17
NC
100pF
0
R24
Vout
C13 C14 + C31 C55 C56 C57 C58
10uF 10uF NC NC NC NC NC
Vout
C43 C44 C45 C46 C47 C48 C49 C50
10uF 10uF 10uF 10uF 10uF 10uF 10uF 10uF