LT3684EDD Просмотр технического описания (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)
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
3684 G10
Minimum Switch On-Time
140
120
100
80
60
40
20
0
–50 –25
0 25 50 75
TEMPERATURE (˚C)
100 125
3684 G13
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)
3684 G16
Switching Frequency
1.20
RT = 45.3k
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
3684 G11
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)
3684 G14
Error Amp Output Current
100
80
60
40
20
0
–20
–40
–60
–80
1.065
1.165 1 .265 1.365
FB PIN VOLTAGE (V)
1.465
3684 G17
Frequency Foldback
1200
RT = 45.3k
1000
800
600
400
200
0
0 200 400 600 800 1000 1200 1400
FB PIN VOLTAGE (mV)
3684 G12
RUN/SS Pin Current
12
10
8
6
4
2
0
05
10 15 20 25 30 35
RUN/SS PIN VOLTAGE (V)
3684 G15
Minimum Input Voltage
4.5
4.0
3.5
3.0
2.5
2.0
0.001
VOUT = 3.3V
TA = 25°C
L = 4.7µH
f = 800kHz
0.01
0.1
1
10
LOAD CURRENT (A)
3684 G18
3684f
5
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