LT3971AIMSE-TRPBF データシートの表示（PDF） - Linear Technology
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LT3971AIMSE-TRPBF Datasheet PDF : 24 Pages
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LT3971A/LT3971A-5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Maximum Load Current
2.5
VOUT = 5V
2.0
TYPICAL
1.5
MINIMUM
1.0
0.5
0
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3971A G10
Load Regulation
0.30
0.25
0.20
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30 REFERENCED FROM VOUT AT 0.5A LOAD
0 200 400 600 800 1000 1200
LOAD CURRENT (mA)
3971A G11
Switching Frequency
1000
950
900
850
800
750
700
650
600
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3971A G12
Switch Current Limit
3.0
2.5
2.0
1.5
1.0
0.5
0
0
20
40
60
80 100
DUTY CYCLE (%)
3971A G13
Switch Current Limit
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
DUTY CYCLE = 30%
1.5
–55 –25 5 35 65 95
TEMPERATURE (°C)
125 155
3971A G14
Switch VCESAT
600
500
400
300
200
100
0
0 250 500 750 1000 1250 1500
SWITCH CURRENT (mA)
3971A G15
Boost Pin Current
30
25
20
15
10
5
0
0 250 500 750 1000 1250 1500
SWITCH CURRENT (mA)
3971A G16
Frequency Foldback
900
800
700
600
500
400
300
200
100
0
0 0.2 0.4 0.6 0.8
FB PIN VOLTAGE (V)
1 1.2
3971A G17
LT3971A-5 Frequency Foldback
900
800
700
600
500
400
300
200
100
0
0
20
40
60
80 100
VOUT (% OF REGULATION VOLTAGE)
3971A G18
3971af
5
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