LT3579IUFD-1-PBF データシートの表示（PDF） - Linear Technology
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LT3579IUFD-1-PBF Datasheet PDF : 40 Pages
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LT3579/LT3579-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Switch Current Limit
10
9
8
7
6
5
4
3
2
1
0
20 30
40 50 60
DUTY CYCLE (%)
70 80
35791 G01
Switch Current Limit
vs Temperature
10
9
8
7
6
5
4
3
2
1
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
35791 G04
Oscillator Frequency
3.0
2.8
2.6
2.4
RT = 34k
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
RT = 432k
0.2
0.0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
35791 G07
Switch Saturation Voltage
350
300
VSW1 = VSW2
250
200
150
100
50
0
012345678
SW1 + SW2 CURRENT (A)
35791 G02
Switch Current Sharing
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0 0.5 1 1.5 2 2.5 3 3.5 4
SW1 CURRENT (A)
35791 G03
Commanded Switch Current vs SS
10
9
8
7
6
5
4
3
2
1
0
0 0.2 0.4 0.6 0.8 1 1.2
SS VOLTAGE (V)
35791 G05
Oscillator Frequency During
Soft-Start
1
1/2
1/3
1/4
1/5
1/6
INVERTING
BOOSTING
CONFIGURATIONS
CONFIGURATIONS
0
0 0.2 0.4 0.6 0.8 1 1.2
FB VOLTAGE (V)
35791 G08
Positive Feedback Voltage
1.23
1.225
1.22
1.215
1.21
1.205
1.2
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
35791 G06
CLKOUT Duty Cycle
80
70
60
50
40
30
20
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
35791 G09
35791f
5
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