LT1105_15 Datasheet, PDF (9/32 Pages) Linear Technology – Offline Switching Regulator

TYPICAL PERFOR A CE CHARACTERISTICS
Error Amplifier Source Current vs
Temperature
350
325
300
275
250
225
200
175
150
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G31
Error Amplifier Low Clamp
Voltage vs Temperature
(FB = 4.75V)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G34
LT1103 Switch Saturation Voltage
vs Temperature
1.2
1.0
0.8
I_SW = 1.5A
0.6
0.4
I_SW = 0.5A
0.2
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G38
Error Amplifier Sink Current vs
Temperature
4.5
4.0
3.5
3.0
2.5
2.0
1.5
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G32
V_C Switching Threshold Voltage
vs Temperature
1.5
1.3
1.1
0.9
0.7
0.5
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G35
LT1103 V_SW Current Limit vs
Duty Cycle
3.0
–55°C
2.5
25°C
2.0
125°C
1.5
1.0
0.5
0
0 10
20 30 40 50 60 70 80
DUTY CYCLE (%)
LT1103 G39
LT1103/LT1105
Error Amplifier High Clamp
Voltage vs Temperature
(FB = 4V)
4.5
4.4
4.3
4.2
4.1
4.0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G33
LT1103 Output Switch Leakage
Current vs Temperature
200
160
V_SW = 45V
120
80
V_SW = 15V
40
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G36
LT1103 V_SW Current Limit vs
Temperature
3.0
2.9 ^{DC = 25%}
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G40
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