LT3685E Просмотр технического описания (PDF) - Linear Technology
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производитель
LT3685E Datasheet PDF : 24 Pages
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LT3685
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted.
Efficiency
100
VIN = 12V
90
VIN = 34V
80
VIN = 24V
70
60
50 VOUT = 5V
L: NEC PLC-0745-5R6
f: 800kHz
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
LOAD CURRENT (A)
3685 G01
Efficiency
90
85
VIN = 12V
80
75
VIN = 24V
70
VIN = 7V
VIN = 34V
65
60
55
50 VOUT = 3.3V
L: NEC PLC-0745-5R6
f: 800kHz
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
LOAD CURRENT (A)
3685 G02
Maximum Load Current
4.0
3.5
TYPICAL
3.0
2.5
MINIMUM
2.0
1.5
1.0
5
VOUT = 3.3V
L = 4.7μH
f = 800 kHz
10
15
20
25
30
INPUT VOLTAGE (V)
3685 G03
Maximum Load Current
3.5
TYPICAL
3.0
2.5
MINIMUM
2.0
1.5
1.0
5
VOUT = 5V
L = 4.7μH
f = 800kHz
10
15
20
25
30
INPUT VOLTAGE (V)
3685 G04
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 (%)
3685 G05
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)
3685 G06
4
Switch Voltage Drop
700
600
500
400
300
200
100
0
0
500 1000 1500 2000 2500
SWITCH CURRENT (mA)
3685 G07
Boost Pin Current
80
70
60
50
40
30
20
10
0
0
500 1000 1500 2000 2500
SWITCH CURRENT (mA)
3685 G08
3685fb
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