LT1308A Просмотр технического описания (PDF) - Linear Technology
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LT1308A Datasheet PDF : 20 Pages
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LT1308A/LT1308B
APPLICATIONS INFORMATION
GROUND PLANE
LBI LBO
C1
+
VIN
R1
1
14
2
13
R2
L1
SHUTDOWN
3
12
MULTIPLE
VIAs
4
LT1308A
LT1308B
11
5
10
6
9
7
8
+
D1
GND
C2
VOUT
1308 F07
Figure 7. Recommended Component
Placement for TSSOP Boost Converter.
Placement is Similar to Figure 4
GROUND PLANE
LBI LBO
C1
+
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.
VIN
3V TO
10V
+ C1
47μF
SHUTDOWN
C2
L1A
CTX10-2
4.7μF
CERAMIC
D1
VIN
SW
LT1308B
SHDN
FB
VC
GND
47k
680pF
L1B
R1
309k
R2
100k
+
VOUT
5V
500mA
C3
220μF
6.3V
C1: AVX TAJC476M016
C2: TAIYO YUDEN EMK325BJ475(X5R)
C3: AVX TPSD227M006
D1: IR 10BQ015
L1: COILTRONICS CTX10-2
1308A/B F08
Figure 8. SEPIC (Single-Ended Primary
Inductance Converter) Converts 3V to 10V
Input to a 5V/500mA Regulated Output
VIN
R1
R2
SHUTDOWN
1
8
2 LT1308A
7
3 LT1308B
6
4
5
MULTIPLE
VIAs
GND
C3
+
L1A
L1B
C2
D1
VOUT
10
1308 F09
Figure 9. Recommended Component Placement for SEPIC
1308abfb
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