LT1432 데이터 시트보기 (PDF) - Linear Technology
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LT1432 Datasheet PDF : 28 Pages
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LT1432
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Input Voltage
100
ILOAD = 0.5A
90
ILOAD = 1A
ILOAD = 2A
80
70
TJ = 25°C
LT1271, L = 50µH
60
0 5 10 15 20
INPUT VOLTAGE (V)
25 30
LT1432 G01
Minimum Input Voltage – Normal
Mode (1070 Family)
7.5
LT1070 FAMILY(40kHz)
TJ = 25°C
7.0
6.5
LT1072 LT1071
LT1070
6.0
5.5
Efficiency vs Load Current
100
LT1271
L = 50µH
90
LT1270
L = 50µH
LT1170
80
L = 25µH
70
TJ = 25°C
60
0 0.5
1.0 1.5 2.0
LOAD CURRENT (A)
2.5 3.0
LT1432 G02
Minimum Input Voltage – Normal
Mode (1170 Family)
7.5
LT1170 FAMILY(100kHz)
TJ = 25°C
7.0
LT1172
LT1171
6.5
LT1170
6.0
5.5
Minimum Input Voltage – Normal
Mode (1270/1271)
7.5
LT1270/1271
TJ = 25°C
7.0
6.5
LT1271
LT1270
6.0
5.5
5.0
0
1
2
3
4
5
OUTPUT CURRENT (A)
LT1432 G03
Burst Mode Minimum Input
Voltage
7.0
TJ = 25°C
6.5
LT1170
6.0
LT1070
5.5
5.0
0
1
2
3
4
5
OUTPUT CURRENT (A)
LT1432 G04
Shutdown Current vs Input
Voltage
50
TJ = 25°C
40
30
20
10
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
LT1432 G07
4
5.0
0
1
2
3
4
5
OUTPUT CURRENT (A)
LT1432 G05
Battery Current in Shutdown*
40
30
VIN = 30V
20
VIN = 6V
10
0
0
25
50
75
100
TEMPERATURE (°C)
LT1432 G08
*DOES NOT INCLUDE LT1271 SWITCH LEAKAGE.
5.0
0
10
20
30
40
50
LOAD CURRENT (mA)
LT1432 G06
Current Limit Sense Voltage*
80
70
60
50
40
0
25
50
75
100
JUNCTION TEMPERATURE (°C)
LT1432 G11
* TEMPERATURE COEFFICIENT OF SENSE VOLTAGE IS
DESIGNED TO TRACK COPPER RESISTANCE.
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