LT3954IUHE データシートの表示（PDF） - Linear Technology
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LT3954IUHE Datasheet PDF : 26 Pages
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LT3954
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
V(ISP–ISN) Threshold
vs CTRL Voltage
300
250
200
150
100
50
0
–50
0
0.5
1
1.5
CTRL VOLTAGE (V)
2
3954 G01
FB Regulation Voltage (VFB)
vs Temperature
1.270
1.265
1.260
1.255
1.250
1.245
1.240
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G04
V(ISP–ISN) Threshold
vs ISP Voltage
260
CTRL = 2V
255
250
245
240
0
10
20
30
ISP VOLTAGE (V)
40
3954 G02
V(ISP–ISN) Threshold
vs FB Voltage
260
230
CTRL = 2V
200
170
140
110
80
CTRL = 0.5V
50
20
1.22
1.225
1.23 1.235 1.24
FB VOLTAGE (V)
1.245 1.25
3954 G05
V(ISP–ISN) Threshold
vs Temperature
265
CTRL = 2V
260
ISN = 0V
255
250
ISP = 24V
245
240
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G03
VREF Source Current
vs Temperature
200
190
180
170
160
150
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G06
VREF Voltage vs Temperature
2.05
2.04
2.03
2.02
2.01
2.00
1.99
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G07
Switching Frequency vs RT
1000
900
800
700
600
500
400
300
200
100
10
RT (kΩ)
100
3954 G08
Switching Frequency
vs Temperature
420
RT = 25.5k
415
410
405
400
395
390
385
380
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G09
For more information www.linear.com/3954
3954fa
5
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