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.
EN/UVLO Current vs Temperature
3.0
2.5
VEN/UVLO = 1.1V
2.0
VEN/UVLO = 0.9V
1.5
1.0
0.5
0
–50 –25
VEN/UVLO = 1.3V
0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G10
EN/UVLO Threshold
vs Temperature
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G11
Error Amplifier Transconductance
vs Temperature
200
190
180
170
160
150
140
130
120
110
100
–50 –25
VIN = 100V
VIN = 6V
0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G13
Error Amplifier Output Current
vs RREF Pin Voltage
60
50
40
30
20
10
0
–10
–20
–30
–40
–50
–60
0
150°C
100°C
25°C
–50°C
0.5 1.0 1.5 2.0 2.5
VREF (V)
3748 G14
Maximum Discontinuous Off-Time
vs Temperature
30
29
28
27
26
25
24
23
22
21
20
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G16
GATE Rise and Fall Time vs Charge
2.0
AVERAGE
1.5
CURRENT
50
1.0
40
30
20
10
0
0
0.5
RISE TIME
0
FALL TIME
Q=C•V
VINTVCC = 7V
tr, tf 10% TO 90%
20 40 60 80 100 120
TOTAL GATE CHARGE (nC)
3748 G17
TC Pin Voltage vs Temperature
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G12
SENSE Pin Threshold
vs Temperature
160
140
OVERCURRENT
120
VC = 2.2V
100
80
60
40
20
VC = 0.2V
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3748 G15
GATE Rise and Fall Time
vs INTVCC Voltage
25
CGATE = 3.3nF
tr, tf 10% TO 90%
20
FALLING
15
RISING
10
5
0
0
5
10
15
20
VINTVCC (V)
3748 G18
3748fa
5
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