Datasheet

LT3757/LT3757A
32
3757afd
Typical applicaTions
5V to 12V Input, ±12V/0.4A Output SEPIC Converter
Nonisolated Inverting SLIC Supply
SENSE
LT3757
V
IN
V
IN
5V TO 12V
C
IN1
1µF
16V, X5R
C
IN2
47µF
16V
C
DC1
4.7µF
16V, X5R
C
DC2
4.7µF
16V
X5R
C
OUT2
4.7µF
16V, X5R
×3
V
OUT1
12V
0.4A
V
OUT2
–12V
0.4A
C
OUT2
4.7µF
16V, X5R
×3
C
VCC
4.7µF
10V
X5R
0.02Ω
M1
30.9k
400kHz
D1, D2: MBRS140T3
T1: COILTRONICS VP1-0076 (*PRIMARY = 4 WINDINGS IN PARALLEL)
M1: SILICONIX/VISHAY Si4840BDY
GATE
FBX
GND
INTV
CC
SHDN/UVLO
SYNC
RT
SS
•
+
105k
46.4k
0.1µF 100pF
22k
6.8nF
T1
1,2,3,4
D1
GND
1.05k
1%
158Ω
1%
D2
5
6
•
•
3757 TA07
V
C
SENSE
LT3757
V
IN
V
IN
5V TO 16V
C
IN
22µF
25V, X5R
×2
C2
10µF
50V
X5R
D1
DFLS160
C
VCC
4.7µF
10V, X5R
C3
22µF
25V
X5R
C4
22µF
25V
X5R
C
OUT
3.3µF
100V
GND
C5
22µF
25V
X5R
V
OUT1
–24V
200mA
V
OUT1
–72V
200mA
0.012Ω
0.5W
M1
Si7850DP
63.4k
200kHz
GATE
FBX
GND
INTV
CC
SHDN/UVLO
SYNC
RT
SS
•
•
•
•
R2
105k
R1
46.4k
0.1µF
100pF
15.8k
464k
9.1k
10nF
T1
1,2,3
4
D2
DFLS160
5
D3
DFLS160
6
VP5-0155 (PRIMARY = 3 WINDINGS IN PARALLEL)
3757 TA08
V
C