Datasheet

LT1308A/LT1308B
10
1308abfb
A SEPIC (Single-Ended Primary Inductance Converter)
schematic is shown in Figure 8. This converter topology
produces a regulated output over an input voltage range
that spans (i.e., can be higher or lower than) the output.
Recommended component placement for an SO-8 package
SEPIC is shown in Figure 9.
APPLICATIONS INFORMATION
Figure 7. Recommended Component
Placement for TSSOP Boost Converter.
Placement is Similar to Figure 4
Figure 8. SEPIC (Single-Ended Primary
Inductance Converter) Converts 3V to 10V
Input to a 5V/500mA Regulated Output
Figure 9. Recommended Component Placement for SEPIC
1
2
14
13
3
4
12
11
10
5
6
7
9
8
L1
C2
D1
LBO
LBI
LT1308A
LT1308B
V
OUT
V
IN
GND
SHUTDOWN
R1
R2
MULTIPLE
VIAs
GROUND PLANE
1308 F07
+
C1
+
V
IN
SW
FB
LT1308B
L1A
CTX10-2
L1B
D1
47k
R2
100k
R1
309k
680pF
1308A/B F08
C1
47µF
C3
220µF
6.3V
C2
4.7µF
CERAMIC
V
OUT
5V
500mA
V
IN
3V TO
10V
V
C
GND
SHDNSHUTDOWN
C1: AVX TAJC476M016
C2: TAIYO YUDEN EMK325BJ475(X5R)
C3: AVX TPSD227M006
+
+
D1: IR 10BQ015
L1: COILTRONICS CTX10-2
1
2
8
7
3
4
6
5
C3
L1A L1B
D1
LBO
LBI
LT1308A
LT1308B
V
OUT
V
IN
GND
SHUTDOWN
R1
R2
GROUND PLANE
1308 F09
MULTIPLE
VIAs
+
C2
C1
+