LM5166
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ZHCSFV4B –DECEMBER 2016–REVISED JUNE 2017
6.7 Typical Characteristics
Unless otherwise specified, VIN = 12 V, VOUT = 5 V. Please refer to Typical Applications for circuit designs.
100
90
80
70
60
50
40
30
100
90
80
70
60
50
40
30
VIN = 8V
VIN = 8V
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 65V
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 65V
0.01
0.1
1
10
100
500
0.01
0.1
1
10
100
500
Load (mA)
Load (mA)
D001
D001
See schematic,
图 52
LF = 150 µH
COUT = 47 µF
FSW(nom) = 100 kHz
See schematic,
图 63
LF = 47 µH
COUT = 47 µF
FSW(nom) = 200 kHz
RRT = 309 kΩ
RRT = 100 kΩ
图 1. Converter Efficiency: 5 V, 500 mA, COT
图 2. Converter Efficiency: 3.3 V, 500 mA, COT
100
90
80
70
60
50
40
30
100
90
80
70
60
50
40
30
VIN = 8V
VIN = 8V
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 12V
VIN = 24V
VIN = 36V
0.01
0.1
1
10
100 300
0.01
0.1
1
10
100
500
Load (mA)
Load (mA)
D001
D001
See schematic,
图 70
LF = 4.7 µH
COUT = 47 µF
FSW(nom) = 600 kHz
See schematic,
图 77
LF = 22 µH
COUT = 200 µF
FSW(nom) = 100 kHz
RRT = 0 Ω
RRT = 0 Ω
图 3. Converter Efficiency: 3.3 V, 300 mA, PFM
图 4. Converter Efficiency: 5 V, 500 mA, PFM
3
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
1.24
1.22
1.2
Rising
Falling
1.18
1.16
1.14
1.12
1.1
Rising
Falling
-50
-25
0
25
50
75
100
125
150
-50
-25
0
25
50
75
100
125
150
Temperature (èC)
Temperature (èC)
D001
D002
图 5. Internal VIN UVLO Voltage vs Temperature
图 6. Enable Threshold Voltage vs Temperature
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