LTC3778 Ver la hoja de datos (PDF) - Linear Technology
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LTC3778 Datasheet PDF : 24 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC3778
On-Time vs ION Current
10k
VVON = 0V
1k
100
10
1
10
ION CURRENT (µA)
100
3778 G20
Current Limit Foldback
150
VRNG = 1V
125
100
75
50
25
0
0
0.15
0.30
0.45
0.60
VFB (V)
3778 G09
Maximum Current Sense
Threshold vs Temperature
150
VRNG = 1V
140
130
120
110
100
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3778 G11
On-Time vs VON Voltage
1000
IION = 30µA
800
600
400
200
0
0
1
2
3
VON VOLTAGE (V)
3778 G21
Maximum Current Sense
Threshold vs VRNG Voltage
300
250
200
150
100
50
0
0.5 0.75 1.0 1.25 1.5 1.75 2.0
VRNG VOLTAGE (V)
3778 G10
Feedback Reference Voltage
vs Temperature
0.62
0.61
0.60
0.59
0.58
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3778 G12
On-Time vs Temperature
300
IION = 30µA
VON = 0V
250
200
150
100
50
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3778 G22
Maximum Current Sense
Threshold vs RUN/SS Voltage
150
VRNG = 1V
125
100
75
50
25
0
1.5
2
2.5
3
RUN/SS VOLTAGE (V)
3.5
3778 G23
Error Amplifier gm vs Temperature
2.0
1.8
1.6
1.4
1.2
1.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3778 G13
3778f
5
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