RT9272 查看數據表（PDF） - Richtek Technology
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RT9272 Datasheet PDF : 11 Pages
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RT9272
Preliminary
Typical Operating Characteristics
Efficiency vs. Input Voltage
89
L = 4.7uH, DCR = 0.15Ω
88
87
86
2LEDs
85
84
4LEDs
83
82
81
80
79
78
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
Input Voltage (V)
Quiescent Current vs. VCC
0.25
VFB = 1V
0.24
0.23
0.22
0.21
0.2
0.19
0.18
0.17
0.16
0.15
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
VCC (V)
Supply Current vs. VCC
2.1
VFB = 0V
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
VCC (V)
0.315
VFB vs. Temperature
0.3125
0.31
0.3075
0.305
0.3025
0.3
0.2975
0.295
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Temperature (°C)
VFB vs. VCC
0.33
0.32
0.31
0.3
0.29
0.28
0.27
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
VCC (V)
EN Pin Voltage vs. Input Voltage
1.6
1.4
VIH
1.2
1.0
VIL
0.8
0.6
0.4
0.2
0.0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
Input Voltage (V)
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6
DS9272-09 August 2007
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