LT3681 データシートの表示（PDF） - Linear Technology
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LT3681
Linear Technology
LT3681 Datasheet PDF : 24 Pages
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LT3681
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted.
Switch Voltage Drop
700
600
500
400
300
200
100
0
0 500 1000 1500 2000 2500 3000 3500
SWITCH CURRENT (mA)
3681 G10
Boost Pin Current
90
80
70
60
50
40
30
20
10
0
0 500 1000 1500 2000 2500 3000 3500
SWITCH CURRENT (mA)
3681 G11
Feedback Voltage
1.290
1.285
1.280
1.275
1.270
1.265
1.260
1.255
1.250
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
4681 G12
Switching Frequency
1.20
RT = 45.3kΩ
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
4681 G13
Frequency Foldback
1200
RT = 45.3kΩ
1000
800
600
400
200
0
0 200 400 600 800 1000 1200 1400
FB PIN VOLTAGE (mV)
3681 G14
Minimum Switch On-Time
140
120
100
80
60
40
20
0
–50 –25
0 25 50 75
TEMPERATURE (˚C)
100 125
3681 G15
Soft Start
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 0.5 1 1.5 2 2.5 3 3.5
RUN/SS PIN VOLTAGE (V)
3681 G16
RUN/SS Pin Current
12
10
8
6
4
2
0
05
10 15 20 25 30 35
RUN/SS PIN VOLTAGE (V)
3681 G17
Boost Diode
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0.5
1.0
1.5
2.0
BOOST DIODE CURRENT (A)
3681 G18
3681f
5
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