LT1308BCS8 Linear Technology, LT1308BCS8 Datasheet - Page 10

• Manufacturer Part Number: LT1308BCS8
• Description: IC DC/DC CONV SINGLE CELL 8-SOIC
• Manufacturer: Linear Technology
• Type: Step-Up (Boost)r

Specifications of LT1308BCS8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 1A
• Frequency - Switching: 600kHz
• Voltage - Input: 1 ~ 10 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

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