L6917 STMicroelectronics, L6917 Datasheet - Page 27

• Manufacturer Part Number: L6917
• Description: 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER
• Manufacturer: STMicroelectronics

CPU Power Supply: 12V
Figure 23 shows the device in a high current CPU core power supply solution.
The output voltage can be adjusted with binary step from 1.100V to 1.850V following VRM 9.0 specifications.
The demo board assembled with the following part list is capable to deliver up to 50A in open air without any
kind of airflow. Peak current can reach 60A without any limitations. For higher DC current, to avoid mosfet
change, airflow or heat sink are required.
Figure 23. CPU Power Supply Schematic
Part List
R1
R2, R9
R3, R4, R5, R6
R7
R8
R10
R12 to R15
R16, R17, R18
Ra
Rosc
C1
GNDin
GNDcc
Vcc
Vin
JP6
S4
S3
S2
S1
S0
To Vcc
C5
L1
JP1
D1
DZ1
C4
Q1a
Rosc
D4
IN
Q2
Q1
10k
Not Mounted
3.3k
3.6k
3.3k
82
2.2
0
1k
1.3M
Not Mounted
- VRM 9.0 - 50A thermal
R16
R2
C8
JP2
R15
R18
R13
R6
R5
OSC / INH
PGNDS1
UGATE1
PHASE1
VCCDR
LGATE1
BOOT1
ISEN1
SGND
VID4
VID3
VID2
VID1
VID0
2
5
4
3
1
13
14
22
21
20
19
18
17
7
FBR
L6917B
11
U1
12
FBG
24
25
26
27
16
15
28
23
10
6
9
8
1%
1%
1%
VCC
BOOT2
UGATE2
PHASE2
LGATE2
ISEN2
PGNDS2
PGND
PGOOD
VSEN
FB
COMP
R14
R17
R12
C7
R3
R10
R7
R8
C2
R4
Q4
Q3
D3
C1
Ra
Ca
Q3a
C3
R9
JP3
D2
C6
L2
R1
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
C9,C10
C14,
C23
C11..C13
JP4
R19
R20
JP5
L6917B
VoutCORE
GNDCORE
PGOOD
FBG
FBR
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