LTC3738 Datasheet, PDF (30/32 Pages) Linear Technology – 3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning

LTC3738
TYPICAL APPLICATIO
65A Power Supply for VRM10
47k
PGOOD
VID2 IN
VID0 IN
V_CC
ON/0FF
VID1 IN
VID5 IN
100pF _51k
10k
OUTEN VID2 VID1 VID0 VID5 PGOOD BOOST1
FCB/SYNC
TG1
PLLFLTR
SW1
R_AVP
IN^–
100Ω
IN⁺
BOOST2
TG2
30pF
R_PREAVP 220Ω
S1^{+ 10Ω ×6}
S1^–
1000pF
S2⁺
S2^–
1000pF
S3^–
S3⁺
1000pF
AVP
EAIN
SENSE1⁺
SENSE1^–
SENSE2⁺
SENSE2^–
SENSE3^–
SENSE3⁺
SS
SW2
LTC3738
V_CC
(EXPOSED PAD IS SGND)
BG1
PGND
BG2
BG3
SW3
TG3
I_TH TSNS VR_HOTB VID3 VID4 BOOST3
0.1µF
100pF
V_CC
2.2k
200Ω _{VID4 IN}
VID3 IN
V_CC
2200pF
V_CC
5V
1Ω
0.1µF
V_CC
0.1µF
1µF
10µF
0.1µF
V_CC
V_IN
M1
L1
0.002Ω
M2
D1
S1⁺
S1^–
V_IN
M3
L2
0.002Ω
M4
D2
S2⁺
S2^–
V_OUT
10µF +
6.3V
×3
C_OUT
10µF +
35V
×5
V_IN
C_IN ^{7V TO 21V}
68µF
25V
V_IN
M5
L3
0.002Ω
3738 TA02
M6
D3
S3⁺
S3^–
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: 0.6µH PULSE PG0006.601 OR TOKO FDA1055 0.56µH
M1, M3, M5: Si7390DP ×1 OR HAT2168H ×1
M2, M4, M6: Si7356DP ×2 OR HAT2165H ×2
Block Diagram—6-Phase LTC3731/LTC3738 Supply
3-PHASE LTC3731
CLKOUT
V_IN
CLK
60°
V_OUT
VRM9/VRM10
90A TO 120A
FCB/SYNC
3-PHASE LTC3738
3738 TA03
3738f
30