LTC3703
Typical applicaTions
36V-72V Input Voltage to 5V/10A Step-Down Converter with Pulse Skip Mode Enabled
V
CC
9.3V TO 15V
V
IN
36V TO 72V
+
22µF
25V
D
B
BAS19
1
2
3
4
5
6
7
8
16
15
14
13
12
MODE/SYNC
V
IN
C
IN
R
SET
+
68µF
100V
×2
25k
f
BOOST
TG
SET
R
C1
M1
Si7852DP
LTC3703
10k
COMP
C
B
L1
4.7µH
C
C
C1
C2
0.1µF
V
OUT
470pF
1000pF
FB
SW
5V
R
20k
10A
MAX
R2
21.5k
1%
I
V
CC
C
MAX
OUT
+
270µF
10V
×2
R 10Ω
F
11
10
9
INV
DRV
CC
M2
Si7852DP
C
SS
0.1µF
RUN/SS
GND
BG
D1
MBR1100
R1
113k
1%
C
DRVCC
R
C2
100Ω
10µF
BGRTN
C
C
C3
2200pF
VCC
1µF
3703 TA01
Single Input Supply 12V/5A Output Step-Down Converter
100Ω
*
10k
V
IN
FZT600
15V TO 80V
12V
+
22µF
25V
D
B
BAS19
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
MODE/SYNC
V
IN
C
68µF
100V
+
IN
CMDSH-3
R
25k
12k
SET
f
BOOST
TG
SET
R
C1
M1
Si7852DP
LTC3703
10k
COMP
C
B
L1
8µH
C
C
C1
C2
0.1µF
V
OUT
470pF
1000pF
FB
SW
12V
5A
R
MAX
R2
8.06k
1%
I
V
MAX
CC
CC
+
C
OUT
R 10Ω
F
270µF
16V
INV
DRV
M2
Si7852DP
C
SS
0.1µF
RUN/SS
GND
BG
R1
113k
1%
D1
MBR1100
C
DRVCC
R
C2
100Ω
10µF
BGRTN
C
C
C3
VCC
1µF
2200pF
3703 TA02
*OPTIONAL ZENER PROVIDES UNDERVOLTAGE LOCKOUT ON INPUT SUPPLY, V
≅ 10 + V
UVLO
Z
3703fc
30
Linear Systems [ Linear Systems ]
