RT8278 データシートの表示（PDF） - Richtek Technology
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RT8278 Datasheet PDF : 16 Pages
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RT8278
Typical Operating Characteristics
100
90
80
70
60
50
40
30
20
10
0
0.0
Efficiency vs. Output Current
VIN = 12V
VIN = 19V
VOUT = 5V, fSW = 2.2MHz
0.4
0.8
1.2
1.6
2.0
Output Current (A)
Output Voltage vs. Output Current
5.12
5.09
5.06
5.03
5.00
4.97
VIN = 19V
VIN = 12V
4.94
4.91
4.88
4.85
0.0
0.4
0.8
1.2
1.6
2.0
Output Current (A)
Quiescent Current vs. Temperature
0.88
0.84
0.80
0.76
0.72
0.68
0.64
0.60
-50 -25
VIN = 12V, RRT = Open
0
25 50 75
Temperature (°C)
100 125
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6
100
90
80
70
60
50
40
30
20
10
0
0.0
Efficiency vs. Output Current
VIN = 12V, VOUT = 3.3V, fSW = 2.2MHz
0.4
0.8
1.2
1.6
2.0
Output Current (A)
Output Voltage vs. Input Voltage
3.370
3.365
3.360
3.355
3.350
3.345
3.340
3.335
3.330
3.325
3.320
3.315
3.310
0
IOUT = 0A
5
10
15
20
25
Input Voltage (V)
Reference Voltage vs. Temperature
0.90
0.86
0.82
0.78
0.74
0.70
-50 -25
VIN = 12V, IOUT = 0A
0
25 50 75 100 125
Temperature (°C)
DS8278-02 March 2011
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