LT3480 Просмотр технического описания (PDF) - Linear Technology
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LT3480 Datasheet PDF : 24 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LT3480
Maximum Load Current
3.5
TYPICAL
3.0
2.5
MINIMUM
2.0
1.5
1.0
5
VOUT = 5V
TA = 25 °C
L = 4.7µH
f = 800kHz
10
15
20
25
30
INPUT VOLTAGE (V)
3480 G07
Switch Voltage Drop
700
600
500
400
300
200
100
0
0
500 1000 1500 2000 2500
SWITCH CURRENT (mA)
3480 G10
Switching Frequency
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
4380 G13
Switch Current Limit
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0
20
40
60
80
100
DUTY CYCLE (%)
3480 G08
Boost Pin Current
80
70
60
50
40
30
20
10
0
0
500 1000 1500 2000 2500
SWITCH CURRENT (mA)
3480 G11
Frequency Foldback
1200
1000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900
FB PIN VOLTAGE (mV)
3480 G14
Switch Current Limit
4.5
4.0
DUTY CYCLE = 10 %
3.5
3.0
2.5
DUTY CYCLE = 90 %
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3480 G09
Feedback Voltage
840
820
800
780
760
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
4380 G12
Minimum Switch On-Time
140
120
100
80
60
40
20
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (˚C)
3480 G15
For more information www.linear.com/LT3480
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