LTC3733 Datasheet, PDF (29/32 Pages) Linear Technology – 3-Phase, Buck Controllers for AMD CPUs

LTC3733/LTC3733-1
TYPICAL APPLICATIO
65A Power Supply for AMD Opteron Processors
V_CC
10k
100pF
71.5k
5V
22.1k
100pF
220pF
1k
51k
VID1 IN ¹
ON/OFF ²
3
4
5
6
7
30pF
8
9
S1⁺
10
S1^{– 1000pF}
11
S2⁺
12
S2^{– 1000pF}
13
S3^–
14
S3^{+ 1000pF}
15
0.1µF 16
17
VID2 IN ¹⁸
VID1
VID0
RUN
PGOOD
PLLFLTR BOOST1
FCB
TG1
IN⁺
SW1
LTC3733
IN^–
BOOST2
DIFFOUT
TG2
EAIN
SW2
SGND
SENSE1⁺
SENSE1^–
SENSE2⁺
SENSE2^–
SENSE3^–
SENSE3⁺
V_CC
BG1
PGND
BG2
BG3
SW3
TG3
SS
BOOST3
I_TH
VID4
VID2
VID3
V_CC
36 _{VID0 IN}
35
PGOOD
47k
34
33
0.1µF ^1Ω
M1
32
31
V_CC
M2
30
0.1µF
29
28
M3
27
26
1µF
10µF
M4
25
24
23
22
M5
21
0.1µF
20
VID4 IN
M6
19
VID3 IN
3733 TA01
V_CC
V_CC
5V
V_IN
L1
0.002Ω
D1
S1⁺
S1^–
V_IN
L2
0.002Ω
D2
S2⁺
S2^–
V_IN
L3
0.002Ω
D3
S3⁺
S3^–
V_OUT
10µF +
6.3V
×3
C_OUT
10µF +
35V
×5
V_IN
C_IN ^{7V TO 21V}
68µF
25V
V_IN: 7V TO 21V
V_OUT: 0.8V TO 1.55V, 65A
SWITCHING FREQUENCY: 300kHz
C_IN: SANYO OS-CON 25SP68M
C_OUT: 330µF/2.5V ×10 SANYO POSCAP 2R5TPE330M9
D1 TO D3: MBRS340T3
L1 TO L3: 0.68µH SUMIDA CEP125-0R6
M1, M3, M5: HAT2168H ×1 OR IRF7811W ×2 OR Si7860DP ×1
M2, M4, M6: HAT2165H ×2 OR IRF7822 ×2 OR Si7892DP ×2
Block Diagram—6-Phase LTC3731/LTC3733-1 Supply
3-PHASE LTC3731
CLKOUT
V_IN
CLK
60°
V_OUT
0.8V TO 1.55V
90A TO 120A
PLLIN
3-PHASE LTC3733-1
3733 TA02
3733f
29