LTC3730_15 Datasheet, PDF (28/28 Pages) Linear Technology – 3-Phase, 5-Bit Intel Mobile VID, 600kHz, Synchronous Buck Controller

LTC3730
TYPICAL APPLICATIO
27pF
OPTIONAL FOR
GAIN
SYNCHRONIZATION
453k
Si1034X
V_OS–
21.5k
DPRSLPVR
1000pF
4.99k
5V
49.9k
1
VID1 IN
20k
2
1%
3
100pF
4
V_{OS– 191k}
5
6
20k 1% 7
DPRSLPVR
8
1/2 Si1034X
9
5V _S1+
10
6.98k ^24.3k
S1^{– 1000pF}
S2⁺
11
12
VID1
VID0
PLLIN PGOOD
PLLFLTR BOOST1
FCB
TG1
IN⁺
LTC3730
SW1
IN^–
BOOST2
AMPOUT
TG2
EAIN
SW2
SGND
SENSE1⁺
SENSE1^–
SENSE2⁺
V_CC
BG1
PGND
BG2
36
5V _PGOOD
VID0 IN
35
34
33
0.1µF ^1Ω
32
31
30
0.1µF
29
28
5V
27
26
1µF
25
47k
M1
M2
M3
M4
5V
V_IN
L1
0.003Ω
D1
S1⁺
S1^–
V_IN
L2
0.003Ω
D2
S2⁺
S2^–
V_OUT
10µF +
6.3V
×3
10µF +
25V
×5
C_OUT
V_OS–
V_IN
C_IN ^{5V TO 24V}
68µF
25V
IN^– VIDI
887k 10k
100pF
1.5nF
3k
S2^{– 1000pF}
S3^–
S3^{+ 1000pF}
13 _SENSE2–
24
BG3
14 _SENSE3–
23
SW3
15 _SENSE3+
22
TG3
17
I_TH
16
RUN/SS
21
BOOST3
20
VID4
0.1µF
VID3 IN
V_IN
M5
L3
0.003Ω
M6
D3
1/2 Si1034X
V_OS–
100k
0.01µF
V_RON
18
VID2 IN
VID2
19
VID3
VID4 IN _5V
V_OUT: 0.6V TO 1.75V, 45A
D1 TO D3: B140A DIODES INC
3730 TA02
S3⁺
S3^–
M1, M3, M5: Si7860DP OR HAT2168H
SWITCHING FREQUENCY: 300kHz
L1 TO L3: SUMIDA 1µH/20A CEP125 IROMC-H
M2, M4, M6: Si7856DP OR HAT2165H
C_IN: SANYO OS-CON 25SP68M
OR 1µH/19A PANASONIC PCC-D126H
C_OUT: 270µF/2V ×6 PANASONIC SP EEUE0D271R
OR TOKO EH125C
Figure 15. IMVP III 0.6V to 1.75V, 45A Power Supply for Mobile Northwood CPU
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC1628/LTC1628-PG/
LTC1628-SYNC
LTC1629/
LTC1629-PG
LTC1702A
LTC1703
LTC1708-PG
LTC1709/
LTC1709-8
LTC1735
2-Phase, Dual Output Synchronous Step-Down
DC/DC Controllers
20A to 200A PolyPhase Synchronous Controllers
No R_SENSE^TM 2-Phase Dual Synchronous Step-Down
Controller
No R_SENSE 2-Phase Dual Synchronous Step-Down
Controller with 5-Bit Mobile VID Control
2-Phase, Dual Synchronous Controller with Mobile VID
High Efficiency, 2-Phase Synchronous Step-Down
Switching Regulators with 5-Bit VID
High Efficiency Synchronous Step-Down
Switching Regulator
Reduces C_IN and C_OUT, Power Good Output Signal, Synchronizable,
3.5V ≤ V_IN ≤ 36V, I_OUT up to 20A, 0.8V ≤ V_OUT ≤ 5V
Expandable from 2-Phase to 12-Phase, Uses All
Surface Mount Components, No Heat Sink, V_IN up to 36V
550kHz, No Sense Resistor
Mobile Pentium^® III Processors, 550kHz,
V_IN ≤ 7V
3.5V ≤ V_IN ≤ 36V, VID Sets V_OUT1, PGOOD
1.3V ≤ V_OUT ≤ 3.5V, Current Mode Ensures
Accurate Current Sharing, 3.5V ≤ V_IN ≤ 36V
Output Fault Protection, 16-Pin SSOP
LTC1778
LTC1929/
LTC1929-PG
LTC3711
LTC3729
LTC3731
No R_SENSE Current Mode Synchronous Step-Down
Controller
2-Phase Synchronous Controllers
No R_SENSE Current Mode Synchronous Step-Down
Controller with Digital 5-Bit Interface
20A to 200A, 550kHz PolyPhase Synchronous Controller
3-Phase, Synchronizable PolyPhase Controller
Up to 97% Efficiency, 4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ (0.9)(V_IN),
I_OUT up to 20A
Up to 42A, Uses All Surface Mount Components,
No Heat Sinks, 3.5V ≤ V_IN ≤ 36V
Up to 97% Efficiency, Ideal for Pentium III Processors,
0.925V ≤ V_OUT ≤ 2V, 4V ≤ V_IN ≤ 36V, I_OUT up to 20A
Expandable from 2-Phase to 12-Phase, Uses all Surface Mount
Components, V_IN up to 36V, QFN, SSOP-28
Expanable to 12-Phase, Undervoltage Lockout Input
LTC3732
3-Phase, 5-Bit VID 600kHz Synchronous Buck Up to 60A VRM 9.0, VID, SSOP-36
No R_SENSE is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.
3730fa
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
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RD/LT 1105 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2002