RT7257G データシートの表示（PDF） - Richtek Technology
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RT7257G Datasheet PDF : 15 Pages
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Typical Operating Characteristics
100
90
80
70
60
50
40
30
20
10
0
0.01
Efficiency vs. Output Current
VIN = 12V
VIN = 17V
VOUT = 3.3V
0.1
1
10
Output Current (A)
3.45
3.43
3.41
3.39
3.37
3.35
3.33
3.31
3.29
3.27
3.25
-50
Output Voltage vs. Temperature
VIN = 12V, VOUT = 3.3V, IOUT = 0A
-25
0
25 50 75 100 125
Temperature (°C)
Switching Frequency vs. Input Voltage
800
790
780
770
760
VOUT = 3.3V, IOUT = 1A
750
4
6
8
10 12 14 16 18
Input Voltage (V)
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS7257G-01 September 2012
RT7257G
3.35
3.34
3.33
3.32
3.31
3.30
3.29
3.28
3.27
3.26
3.25
4
Output Voltage vs. Input Voltage
VIN = 4.5V to 17V, VOUT = 3.3V, IOUT = 0.6A
6
8
10 12 14 16 18
Input Voltage (V)
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
0
Output Voltage vs. Output Current
VIN = 12V
VIN = 17V
VOUT = 3.3V
0.5
1
1.5
2
2.5
3
Output Current (A)
Switching Frequency vs. Temperature
800
780
760
VIN = 12V
VIN = 5V
740
720
700
-50 -25
VOUT = 3.3V, IOUT = 1A
0
25 50 75
Temperature (°C)
100 125
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