LT1372IS8 查看數據表（PDF） - Linear Technology
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LT1372IS8 Datasheet PDF : 12 Pages
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LT1372/LT1377
TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown Delay and Threshold
vs Temperature
20
2.0
18
1.8
16
SHUTDOWN THRESHOLD
1.6
14
1.4
12
1.2
10
1.0
8 SHUTDOWN DELAY
0.8
6
0.6
4
0.4
2
0.2
0
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1372 • G04
S/S Pin Input Current
vs Voltage
5
VIN = 5V
4
3
2
1
0
–1
–2
–3
–4
–5
–1 0 1 2 3 4 5 6 7 8 9
S/S PIN VOLTAGE (V)
LT1372 • G07
VC Pin Threshold and High
Clamp Voltage vs Temperature
2.4
2.2
2.0
VC HIGH CLAMP
1.8
1.6
1.4
1.2
VC THRESHOLD
1.0
0.8
0.6
0.4
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1372 • G10
Minimum Synchronization
Voltage vs Temperature
3.0
fSYNC = 700kHz (LT1372)
fSYNC = 1.4MHz (LT1377)
2.5
2.0
LT1377
1.5
LT1372
1.0
0.5
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1372 • G05
Switching Frequency
vs Feedback Pin Voltage
110
100
90
80
70
60
50
40
30
20
10
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
FEEDBACK PIN VOLTAGE (V)
LT1372 • G08
Feedback Input Current
vs Temperature
800
700 VFB =VREF
600
500
400
300
200
100
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1372 • G11
Error Amplifier Output Current
vs Feedback Pin Voltage
400
300
25°C
200
125°C
–55°C
100
0
–100
–200
–300
–0.3 –0.2 –0.1 VREF 0.1
FEEDBACK PIN VOLTAGE (V)
LT1372 • G06
Error Amplifier Transconductance
vs Temperature
2000
1800
1600
gm
=
∆I (VC)
∆V (FB)
1400
1200
1000
800
600
400
200
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1372 • G09
Negative Feedback Input Current
vs Temperature
0
VNFB =VNFR
–10
–20
–30
–40
–50
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1372 • G12
4
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