LT3980IMSE-TRPBF Просмотр технического описания (PDF) - Linear Technology
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LT3980IMSE-TRPBF
Linear Technology
LT3980IMSE-TRPBF Datasheet PDF : 24 Pages
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LT3980
Typical Performance Characteristics TA = 25°C unless otherwise noted.
Switch Voltage Drop
700
600
500
400
300
200
100
0
0
1
2
SWITCH CURRENT (A)
3
3980 G10
Boost Pin Current
vs Switch Current
120
105
90
75
60
45
30
15
0
0
1
2
SWITCH CURRENT (A)
3
3980 G11
Feedback Voltage
840
820
800
780
760
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3980 G12
Switching Frequency
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
RF = 32.4k
0.80
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3880 G13
Frequency Foldback
1200
1000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900
FB PIN VOLTAGE (mV)
3980 G14
RT vs Frequency
3500
3000
2500
2000
1500
1000
500
0
1
10
100
RESISTANCE (kΩ)
1000
3980 G15
Minimum Switch On-Time
240
220
200
180
160
140
120
ILOAD = 1A
100
–50 –25 0
25 50 75 100 125 150
TEMPERATURE (°C)
3980 G16
Soft-Start
7
6
5
4
3
2
1
0
0 0.5 1 1.5 2 2.5 3 3.5
RUN/SS PIN VOLTAGE (V)
3980 G17
For more information www.linear.com/LT3980
RUN/SS Pin Current
24
20
16
12
8
4
0
0 10 20 30 40 50 60
RUN/SS PIN VOLTAGE (V)
3980 G18
3980fa
5
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