LT3592 Просмотр технического описания (PDF) - Linear Technology
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LT3592 Datasheet PDF : 24 Pages
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LT3592
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise noted)
Undervoltage Lockout
vs Temperature
3.4
3.3
3.2
3.1
–50
0
50
100
TEMPERATURE (°C)
150
3592 G10
Switching Frequency
vs Temperature
2300
2100
RT = 48.7k
1900
1700
1500
1300
1100
900
RT = 140k
700
500
RT = 357k
300
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3592 G11
Current Limit During Soft Start
1400
1200
1000
800
600
400
200
0
0.5
1
1.5
2
2.5
VSHDN (V)
3592 G12
Frequency Foldback
2500
RT = 48.7k
2000
1500
1000
500
0
600 800 1000 1200 1400 1600 1800 2000 2200
SHDN VOLTAGE (mV)
3592 G13
Operating Waveforms
Switch Current Limit
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
0
20
40
60
DUTY CYCLE (%)
80 100
3592 G14
Switch Current Limit
1.50
1.45
1.40
1.35
1.30
TYPICAL
1.25
1.20
1.15
1.10
1.05
1.00
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3592 G15
Operating Waveforms,
Discontinuous Mode
500ns/DIV
VSW
5V/DIV
VCAP
10mV/DIV
AC-COUPLED
IL
500mA/DIV
3592 G16
500ns/DIV
VSW
5V/DIV
VCAP
10mV/DIV
AC-COUPLED
IL
500mA/DIV
3592 G17
3592fc
5
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