L6910 STMicroelectronics, L6910 Datasheet - Page 21

• Manufacturer Part Number: L6910
• Description: IC PWM BUCK BST VM 16SOIC
• Manufacturer: STMicroelectronics

Specifications of L6910

• Pwm Type: Voltage Mode
• Number Of Outputs: 1
• Frequency - Max: 230kHz
• Duty Cycle: 100%
• Voltage - Supply: 5 V ~ 12 V
• Buck: Yes
• Boost: Yes
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 16-SOIC (3.9mm Width)
• Frequency-max: 230kHz
• Output Voltage: 4 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3656-5; 497-4220-5; 497-4220-5

Figure 24. Efficiency vs Output Current Source
Figure 25. Efficiency vs Output Current Sink
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 26, 27 and 28, 29 show the efficiency of the
L6910 in sink and source mode, up to 17A both for DDRI
and DDRII memories.The measurements have been re-
alized with the 15A demo board. (See pag.11 )
Figure 26. Efficiency vs Output Current Sink
95
95
90
90
85
85
80
80
75
75
70
70
65
65
60
60
95
95
95
90
90
90
85
85
85
80
80
80
75
75
75
70
70
70
65
65
65
60
60
60
10 0
10 0
10 0
1
1
9 0
9 0
9 0
8 0
8 0
8 0
7 0
7 0
7 0
6 0
6 0
6 0
5 0
5 0
5 0
1
1
1
1
1
1
Mode
Mode
Mode
Vcc=12V
Vcc=12V
Vout=1.25V
Vout=1.25V
Fsw=200KHz
Fsw=200KHz
Vcc=12V
Vcc=12V
Vcc=12V
Vout=1.25V
Vout=1.25V
Vout=1.25V
Fsw=200KHz
Fsw=200KHz
Fsw=200KHz
2
2
2
2
2
Vcc=12V
Vcc=12V
Vcc=12V
Vcc=12V
Vout=1.25V
Vout=1.25V
Vout=1.25V
Vout=1.25V
Fsw=200KHz
Fsw=200KHz
Fsw=200KHz
Fsw=200KHz
3
3
3
Vin=12V
Vin=12V
Vin=12V
Vin=12V
Vin=12V
Vin=12V
5
5
5
3
3
3
3
3
Output Current (A)
Output Current (A)
Output Current (A)
Output Current (A)
Output Current (A)
Output Current (A)
Output Current (A)
Output Current (A)
Output Current (A)
7
7
7
4
4
4
4
4
9
9
9
5
5
5
5
5
Vin=12V
Vin=12V
Vin=12V
11
11
11
Vin=12V
Vin=12V
Vin=2.5V
Vin=2.5V
Vin=2.5V
Vin=2.5V
Vin=2.5V
Vin=2.5V
Vin=2.5V
13
13
13
6
6
Vin=2.5V
Vin=2.5V
6
6
6
15
15
15
7
7
7
7
7
17
17
17
8
8
8
8
8
Figure 27. Efficiency vs Output Current Sink
Figure 28. Efficiency vs Output Current Source
Figure 29. Efficiency vs Output Current Source
100
100
90
90
80
80
70
70
60
60
50
50
100
100
100
100
100
100
100
90
90
90
90
80
80
80
80
70
70
70
70
60
60
60
60
50
50
50
50
40
40
40
40
90
90
90
80
80
80
70
70
70
60
60
60
50
50
50
1
1
1
1
1
1
1
1
1
Mode
Mode
Mode
3
3
Vcc=12V
Vcc=12V
Vout=1.25V
Vout=1.25V
Fsw=200KHz
Fsw=200KHz
Vcc=12V
Vcc=12V
Vcc=12V
Vout=0.9V
Vout=0.9V
Vout=0.9V
Fsw=200KHz
Fsw=200KHz
Fsw=200KHz
Vin=12V
Vin=12V
Vin=12V
Vout=0.9V
Vout=0.9V
Vout=0.9V
Fsw=200KHz
Fsw=200KHz
Fsw=200KHz
3
3
3
3
3
3
3
5
5
5
5
5
5
5
5
5
Output Current (A)
Output Current (A)
Output Current (A)
Output Current (A)
7
7
7
7
7
7
7
7
7
Output Current (A)
Output Current (A)
9
9
9
9
9
9
9
9
9
Vout=12V
Vout=12V
11
11
Vin=12V
Vin=12V
Vin=12V
Vout=2.5V
Vout=2.5V
Vin=12V
Vin=12V
Vin=12V
11
11
11
11
11
11
11
L6910 - L6910A
Vin=1.8V
Vin=1.8V
Vin=1.8V
13
13
Vin=1.8V
Vin=1.8V
Vin=1.8V
13
13
13
13
13
13
13
15
15
15
15
15
15
15
15
15
17
17
17
17
17
17
17
17
17
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