Datasheet

LT1950
18
1950fa
APPLICATIO S I FOR ATIO
WUUU
Figure 14. 4V to 36V Input, 12V/1.5A Automotive SEPIC Converter
COMP
FB
R
OSC
SYNC
SLOPE
V
REF
SHDN
GND
V
SEC
V
IN
BOOST
PGND
GATE
V
IN2
I
SENSE
BLANK
LT1950
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
R4
133k
R10
0.010Ω
R3
18k
R5
16.2k
R7
71.5k
C1
2200pF
C5
10µF
50V
V
IN
V
IN
4V TO 36V
+V
OUT
C
IN
10µF
50V
TDK
C
OUT
47µF, 16V
X5R, TDK
×4
+V
OUT
12V, 1.5A
C2
0.1µF
C6
0.01µF
C3
4.7µF
16V
C4
4.7µF
16V
R8
47k
R9, 47Ω
R6
35.7k
R1
10.5k
R2
1.21k
3.3V BIAS
Q1
Si7456
D2
BAS516
L1
4.7µH
L2*
L3*
D1
MBRD660CT
*L2, L3 (COUPLED INDUCTORS)
VP5-0155