Datasheet

11
LT1304/LT1304-3.3/LT1304-5
TYPICAL APPLICATIONS
U
2-Cell to 3.3V Boost Converter
V
IN
SW
GND
I
LIM
NC
SENSE
LT1304-3.3
C2**
100µF
10V
C1**
100µF
2 CELLS
L1*
22µH
MBRS130L
3.3V
300mA
*SUMIDA CD54-220
**AVX TPSD107M010R0100
1304 TA05
SHUTDOWN
SHDN
+
+
2-Cell to 3.3V Converter Efficiency
LOAD CURRENT (mA)
90
80
70
60
50
40
30
EFFICIENCY (%)
1304 TA06
0.1 1 10 1000100
V
IN
= 3.3V
V
IN
= 2.5V
V
IN
= 2.5V
LOAD CURRENT (mA)
90
80
70
60
50
40
30
EFFICIENCY (%)
1304 TA06
0.1 1 10 1000100
V
IN
= 3.3V
V
IN
= 2.5V
V
IN
= 1.8V
3.3V SEPIC (Step-Up/Step-Down Converter)
LOAD CURRENT (mA)
1
EFFICIENCY (%)
10 100 500
1304 TA08
80
75
70
65
60
55
50
V
IN
= 4.5V
V
IN
= 3.5V
V
IN
= 2.5V
3.3V SEPIC Efficiency
5V SEPIC (Step-Up/Step-Down Converter)
5V SEPIC Efficiency
LOAD CURRENT (mA)
1
EFFICIENCY (%)
10 100 500
1304 TA10
80
75
70
65
60
55
50
V
IN
= 6V
V
IN
= 5V
V
IN
= 4V
V
IN
= 3V
V
IN
I
LIM
SW
GND
NC
SENSE
V
IN

3V TO 8V
LT1304-5
100µF
††

10V
47µF
†

16V
C1**
1µF
L1A*
MBRS130L
2
1
5V
200mA
 *COILTRONICS CTX20-1
**TOKIN 1E105ZY5U-C103-F

†
AVX TPSD476M016R0150
††
AVX TPSD107M010R0100
1304 TA09
SHUTDOWN
SHDN
+
L1B*
4
3
+
V
IN
I
LIM
SW
GND
NC
SENSE
V
IN

2.5V TO 8V
LT1304-3.3
C3
††

100µF
10V
C2
†

47µF
16V
C1**
1µF
L1A*
MBRS130L
2
1
3.3V
300mA
 *COILTRONICS CTX20-1
 **TOKIN 1E105ZY5U-C103-F

†
AVX TPSD476M016R0150
 ††
AVX TPSD107M010R0100
1304 TA07
SHUTDOWN
SHDN
+
L1B*
4
3
+