LT3684EDD データシートの表示（PDF） - Linear Technology
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LT3684EDD Datasheet PDF : 24 Pages
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LT3684
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted)
Efficiency (VOUT = 5.0V)
100
VIN = 12V
90
VIN = 24V
80
70
60
L: NEC PLC-0745-4R7
f = 800kHz
50
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
LOAD CURRENT (A)
3684 G01
Maximum Load Current
4.0
3.5
TYPICAL
3.0
2.5
2.0
1.5
1.0
5
MINIMUM
VOUT = 3.3V
TA = 25°C
L = 4.7µH
f = 800kHz
10
15
20
25
30
INPUT VOLTAGE (V)
3684 G04
Switch Current Limit
4.5
4.0
DUTY CYCLE = 10 %
3.0
2.5
DUTY CYCLE = 90 %
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3684 G07
Efficiency (VOUT = 3.3V)
90
VIN = 7V
85
80
VIN = 24V VIN = 12V
75
70
65
60
55
L: NEC PLC-0745-4R7
f = 800kHz
50
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
LOAD CURRENT (A)
3684 G02
Maximum Load Current
4.0
3.5
TYPICAL
3.0
2.5
2.0
1.5
1.0
5
MINIMUM
VOUT = 5V
TA = 25°C
L = 4.7µH
f = 800kHz
10
15
20
25
30
INPUT VOLTAGE (V)
3684 G05
Switch Voltage Drop
700
600
500
400
300
200
100
0
0 500 1000 1500 2000 2500 3000 3500
SWITCH CURRENT (mA)
3684 G08
Efficiency
90
85
VIN = 12V
80
VIN = 24V
75
70
65
60
55
VOUT = 3.3V
L = 10µH
LOAD = 1A
50
0 0.5 1 1.5 2 2.5 3
SWITCHING FREQUENCY (MHz)
3684 G03
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 (%)
3684 G06
Boost Pin Current
90
80
70
60
50
40
30
20
10
0
0 500 1000 1500 2000 2500 3000 3500
SWITCH CURRENT (mA)
3684 G09
3684f
4
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