L6910G データシートの表示（PDF） - STMicroelectronics
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L6910G Datasheet PDF : 26 Pages
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L6910G
Figure 22. Efficiency vs Output Current Source
Mode
95
90
Vin=2.5V
85
80
75
70
Vcc=12V
Vout=1.25V
65
Fsw=200KHz
Vin=12V
60
1
2
3
4
5
6
7
Output Current (A)
8
Figure 23. Efficiency vs Output Current Sink
Mode
95
90
85
80
Vin=2.5V
75
70
Vcc=12V
Vout=1.25V
65
Fsw=200KHz
Vin=12V
60
1
2
3
4
5
6
7
8
Output Current (A)
For very big systems (e.g. servers), the DDR memory
termination can require much higher currents, in the
range of 10A-15A and more.
Figures 24, 25 and 26, 27 show the efficiency of the
L6910G in sink and source mode, up to 17A both for
DDRI and DDRII memories.The measurements have
been realized with the 15A demo board. (See pag.11 )
Figure 24. Efficiency vs Output Current Sink
Mode
100
90
80
Vin=12V
Vin=12V
70
Vcc=12V
60
Vout=1.25V
Fsw=200KHz
Vin=2.5V
50
1 3 5 7 9 11 13 15 17
Output Current (A)
Figure 25. Efficiency vs Output Current Sink
Mode
100
90
80
Vin=1.8V
70
60
50
40
1
Vcc=12V
Vout=0.9V
Fsw=200KHz
Vin=12V
3 5 7 9 11 13 15 17
Output Current (A)
Figure 26. Efficiency vs Output Current Source
Mode
100
90
Vout=2.5V
80
70
Vcc=12V
60
Vout=1.25V
Fsw=200KHz
Vout=12V
50
1 3 5 7 9 11 13 15 17
Output Current (A)
Figure 27. Efficiency vs Output Current Source
Mode
100
90
Vin=1.8V
80
Vin=12V
70
Vin=12V
60
Vout=0.9V
Fsw=200KHz
50
1 3 5 7 9 11 13 15 17
Output Current (A)
19/26
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