LT1738 データシートの表示（PDF） - Linear Technology
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LT1738 Datasheet PDF : 20 Pages
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LT1738
TYPICAL PERFOR A CE CHARACTERISTICS
Feedback Voltage and Input
Current vs Temperature
1.260
1.258
1.256
1.254
1.252
1.250
1.248
1.246
1.244
1.242
1.240
–50 –25
750
700
650
600
550
500
450
400
350
300
250
0 25 50 75 100 125 150
TEMPERATURE (°C)
1738 G01
Negative Feedback Voltage and
Input Current vs Temperature
2.480
3.2
2.485
3.0
2.490
2.8
2.495
2.6
2.500
2.4
2.505
2.2
2.510
2.0
2.515
1.8
2.520
–50 –25
1.6
0 25 50 75 100 125 150
TEMPERATURE (°C)
1738 G02
Feedback Overvoltage Shutdown
vs Temperature
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
1.25
1.20
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
1738 G03
Error Amp Transconductance vs
Temperature
2000
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
1738 G04
Error Amp Output Current vs
Feedback Pin Voltage from Nominal
500
400
–40°C
300
200
25°C
100
125°C
0
–100
–200
–300
–400
–500
–400 –300 –200 –100 0 100 200 300 400
FEEDBACK PIN VOLTAGE FROM NOMINAL (mV)
1738 G05
VC Pin Threshold and Clamp
Voltage vs Temperature
1.4
CLAMP
1.2
1.0
0.8
0.6
0.4
THRESHOLD
0.2
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
1738 G06
4
CS Pin Trip Voltage and CS Fault
Voltage vs Temperature
240
220
FAULT
200
180
160
140
120
TRIP
100
80
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
1738 G07
SHDN Pin On and Off Thresholds
vs Temperature
1.50
1.45
ON
1.40
1.35
1.30
OFF
1.25
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
1738 G08
1738fa
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