Datasheet

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