LM2575 查看數據表（PDF） - First Components International
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LM2575 Datasheet PDF : 10 Pages
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LM2575 1.0A Step - Down Voltage Switching Regulators
Typical Performance Characteristics
Figure 4. Quiescent Current
20
VOUT = 5V
18
Measured at
Ground Pin
16
TJ = 25°C
14
12
10
ILOAD = 1A
8
6
ILOAD = 200mA
4
0 10 20 30 40 50 60
INPUT VOLTAGE (V)
Figure 5. Maximum Power Dissipation(TO-263)
4
qJA = 32°C/ W
qJA = 37°C/ W
3
2
1 qJA = 50°C/ W
qJA = 73°C/ W
0
0 10 20 30 40 50 60 70 80 90 100
AMBIENT TEMPERATURE (°C)
Figure 6. Minimum Operating Voltage
5.0
Adjustable Version Only
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
VOUT = 1.23V
0.5 ILOAD = 120 mA
0
-50 -25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
Figure 7. ON / OFF Pin Current (Sinking)
8
VIN = 40V
7
-40°C TJ 125°C
6
5
4
3
2
1
0
0
5 10 15 20 25
ON / OFF PIN VOLTAGE (V)
8
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