Datasheet

8
LT1930/LT1930A
TYPICAL APPLICATIO S
U
Efficiency
GND
V
IN
SW
SHDN FB
4V TO 6.5V
4
51
3
D1
L1
10µH
L2
10µH
2
243k
LT1930
1930 TA02a
C1
2.2µF
4-CELL
BATTERY
C2
10µF
C3
1µF
82.5k
V
OUT
5V
300mA
C1: TAIYO-YUDEN X5R LMK212BJ225MG
C2: TAIYO-YUDEN X5R JMK316BJ106ML
C3: TAIYO-YUDEN X5R LMK212BJ105MG
SHDN
D1: ON SEMICONDUCTOR MBR0520
L1, L2: MURATA LQH3C100K24
LOAD CURRENT (mA)
0
EFFICIENCY (%)
60
65
70
400 500
1930 TA02b
55
50
40
100
200
300
45
80
75
V
IN
= 6.5V
V
IN
= 4V
4-Cell to 5V SEPIC Converter
4-Cell to 5V SEPIC Converter with Coupled Inductors
GND
V
IN
SW
SHDN FB
4V TO 6.5V
4
51
•
•
3
D1
L1A
10µH
L1B
10µH
2
243k
LT1930
1930/A TA03
C1
2.2µF
4-CELL
BATTERY
C2
10µF
C3
1µF
82.5k
V
OUT
5V
300mA
C1: TAIYO-YUDEN X5R LMK212BJ225MG
C2: TAIYO-YUDEN X5R JMK316BJ106ML
C3: TAIYO-YUDEN X5R LMK212BJ105MG
D1: ON SEMICONDUCTOR MBR0520
L1: SUMIDA CLS62-100
SHDN
GND
V
IN
SW
SHDN FB
V
IN
5V
4
51
3
D1
L1
10µH
2
R1
665k
LT1930
1930/A TA04
C2
2.2µF
C1
4.7µF
R2
36.5k
V
OUT
24V
90mA
C1: TAIYO-YUDEN X5R EMK316BJ475ML
C2: TAIYO-YUDEN X5R JMK212BJ475MG
D1: ON SEMICONDUCTOR MBR0530
L1: SUMIDA CR43-100
SHDN
5V to 24V Boost Converter
GND
V
IN
SW
SHDN FB
V
IN
5V
4
51
3
D1
C4
1µF
D2
L1
3.3µH
2
R1
147k
C5
1µF
LT1930
D3
D4
1930/A TA05
C2
2.2µF
C6
2.2µF
C1
2.2µF
R2
13.3k
–15V
70mA
15V
70mA
C1: TAIYO-YUDEN X5R LMK212BJ225MG
C2, C3: TAIYO-YUDEN X5R EMK316BJ225ML
C4, C5: TAIYO-YUDEN X5R TMK316BJ105ML
[phone]
D1 TO D4: ON SEMICONDUCTOR MBR0520 [phone]
L1: SUMIDA CR43-3R3 [phone]
OFF ON
±15V Dual Output Converter with Output Disconnect