LT1943 데이터 시트보기 (PDF) - Linear Technology
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LT1943 Datasheet PDF : 20 Pages
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LT1943
TYPICAL PERFOR A CE CHARACTERISTICS
VON Current Limit
100
TA = 25°C
90
80
70
60
50
40
30
5 10 15 20 25 30 35 40
VON (V)
1943 G13
Oscillator Frequency
1.4
1.3
1.2
1.1
1.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1943 G14
Frequency Foldback
1.4
TA = 25°C
1.2
1.0
0.8
0.6
0.4
0.2
0
0 0.2 0.4 0.6 0.8 1.0 1.2
FEEDBACK VOLTAGE (V)
1943 G15
Reference Voltage
1.27
1.26
1.25
1.24
1.23
1.22
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1943 G16
Efficiency, AVDD = 13V
100
VIN = 5V
TA = 25°C
90
80
70
60
50
0
0.1 0.2 0.3 0.4 0.5
LOAD CURRENT (A)
1943 G18
Bias Pin Current
100
80
60
ISW2 = 1.5A
ISW3 = 0.2A
40
ISW4 = 0.3A
20
ISW2 = ISW3 = ISW4 = 0A
0
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
1943 G17
Efficiency, VLOGIC = 3.3V
100
VIN = 5V
TA = 25°C
90
80
70
60
50
0
0.25 0.50 0.75 1.00
LOAD CURRENT (A)
1.25 1.50
1943 G19
1943fa
6
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