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L6718 Datenblatt(PDF) 47 Page - STMicroelectronics

Teilenummer L6718
Bauteilbeschribung  SMBus interface for power management
PDF  71 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
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L6718 Datenblatt(HTML) 47 Page - STMicroelectronics

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L6718
L6718 power manager
7.3
DPM
Dynamic phase management allows the number of working phases to be adjusted
according to the delivered current while still maintaining the benefits of the multi-phase
regulation in order to achieve high efficiency performance.
Phase number is reduced by monitoring the voltage level across the IMON pin: the L6718
reduces the number of working phases according to the DPM strategy.
In order to reach the right DPM threshold, the IMON resistor (between IMON pin and GND)
must be designed to reach 1.24 V when IMAX is applied by the load. A hysteresis (50 mV
typ.) is provided for each threshold in order to avoid multiple DPM actions triggering in
steady load conditions.
Different DPM thresholds can be selected by SMBus or CONFIG3 pinstrapping to match the
application with the best efficiency performance.
When DPM is enabled, the L6718 starts monitoring the IMON voltage for phase number
modifications after VR_RDY has transition high: the soft-start is then implemented in
interleaving mode with all the available phases enabled.
DPM is reset in the case of a SetVID command that affects the CORE section and when
LTB Technology detects a load transient. After being reset, if the voltage across IMON is
compatible, DPM is re-enabled after a proper delay.
2
F
0.715
6
F
1.355
A
F
1.995
E
F
3
0
0.725
7
0
1.365
B
0
2.005
F
0
3
1
0.735
7
1
1.375
B
1
2.015
F
1
3
2
0.745
7
2
1.385
B
2
2.025
F
2
3
3
0.755
7
3
1.395
B
3
2.035
F
3
3
4
0.765
7
4
1.405
B
4
2.045
F
4
3
5
0.775
7
5
1.415
B
5
2.055
F
5
3
6
0.785
7
6
1.425
B
6
2.065
F
6
3
7
0.795
7
7
1.435
B
7
2.075
F
7
3
8
0.805
7
8
1.445
B
8
2.085
F
8
3
9
0.815
7
9
1.455
B
9
2.095
F
9
3
A
0.825
7
A
1.465
B
A
2.105
F
A
3
B
0.835
7
B
1.475
B
B
2.115
F
B
3
C
0.845
7
C
1.485
B
C
2.125
F
C
3
D
0.855
7
D
1.495
B
D
2.135
F
D
3
E
0.865
7
E
1.505
B
E
2.145
F
E
3
F
0.875
7
F
1.515
B
F
2.155
F
F
Table 16. SMBus VID (continued)
HEX Code
VOUT [V]
HEX Code
VOUT [V]
HEX Code
VOUT [V]
HEX Code



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