L6919E Datasheet, PDF (30/33 Pages) STMicroelectronics – 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT

L6919E
DEMO BOARD ENHANCEMENTS: 1.200V / 52A CPU Power Supply
Considering the same application schematic, minor changes can be done to achieve the 52A thermal output
current required by AMD Hammer processor core. Part list has been modified as follow:
Part List
R2
147k
1%
R1, R20,R21
Not Mounted
R3, R4, R5, R6
1.5k
1%
R7
1k
1%
R8
1.8k
R9
47k
1%
R10
510
R11
82
R12 to R19
0
SMD 0806
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
SMD 0805
C1
C2
C3, C4
C5, C6, C7, C8
C9, C10
C11 to C13
C14 to C18
C24
Not Mounted
10n
100n
1µ
10µ or 22µ / 16V
1800µ / 16V
2200µ / 6.3V
100n
SMD 0805
SMD 0805
SMD 0805
Ceramic
SMD 1206
TDK Multilayer Ceramic SMD 1206
Rubycon MBZ
Radial 10x23
Rubycon MBZ
Radial 10x20
SMD 0805
L1, L2
U1
Q1, Q1a, Q3, Q3a
Q2, Q4
0.8µ
L6919E
SUB85N03-04P
SUB70N03-09BP
77121 - 4Turns
STMicroelectronics
Vishay-Siliconix
Vishay-Siliconix
SO28
D²PACK
D²PACK
D1, D2
D3, D4
STPS340U
1N4148
STMicroelectronics
STMicroelectronics
SMB
SOT23
S0,S4
S1,S2,S3
Short
Open
STATIC PERFORMANCES
Figure 28 shows the demo board measured efficiency versus load current in steady state conditions without air-
flow at ambient temperature.
Figure 28. System Efficiency
90
85
80
75
70
65
60
55
50
45
40
0
5
10 15 20 25 30 35 40 45 50 55 60
Output Current [A]
30/33