LT3748H(RevA) Просмотр технического описания (PDF) - Linear Technology
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LT3748H Datasheet PDF : 30 Pages
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LT3748
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Output Regulation vs Temperature
15.6
FIGURE 15 CIRCUIT
IOUT = 150mA ON EACH OUTPUT
15.4 VIN = 12V
15.2
15.0
14.8
14.6
14.4
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (oC)
3748 G01
INTVCC Voltage vs Temperature
7.5
7.4
7.3
7.2
7.1
IINTVCC = 0mA
7.0
6.9
IINTVCC = 10mA
6.8
6.7
6.6
6.5
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G04
INTVCC Regulator Dropout
vs INTVCC Current
3.0
VIN = 5V
2.5
2.0
1.5
1.0
0.5
0
0
150°C
100°C
25°C
–50°C
10
20
30
INTVCC CURRENT (mA)
40
3748 G07
Quiescent Current vs Temperature
1.7
VSS = 0V
1.6 INTVCC = OPEN
1.5
VIN = 72V
1.4
VIN = 36V
1.3
1.2
VIN = 12V
1.1
VIN = 6V
1.0
0.9
0.8
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G02
INTVCC Voltage vs VIN Voltage
7.5
IINTVCC = 0mA
7.0
IINTVCC = 10mA
6.5
6.0
5.5
5.0
4.5
4.0
4 6 8 10 20 40 60 80 100
VIN VOLTAGE (V)
3748 G05
INTVCC Dropout vs Temperature
3.0
VIN = 5V
2.5
2.0
IINTVCC = 20mA
1.5
IINTVCC = 10mA
1.0
0.5
0
–50 –25
IINTVCC = 5mA
0 25 50 75 100 125 150
TEMPERATURE (oC)
3748 G08
Quiescent Current vs VIN Voltage
1.6
VSS = 0V
1.4 INTVCC = OPEN
1.2
1.0
0.8
0.6
0.4
0.2
0
0
20
40
60
80 100
VIN (V)
3748 G03
INTVCC Undervoltage Lockout
vs Temperature
4.0
3.9
3.8
3.7
RISING THRESHOLD
3.6
FALLING THRESHOLD
3.5
3.4
3.3
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G06
Soft-Start Current vs Temperature
6
5
4
3
2
1
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (oC)
3748 G09
3748fa
4
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