28
LTC3732
3732f
LT/TP 0503 1K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2002
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
PART NUMBER DESCRIPTION COMMENTS
LTC1530 High Power Step-Down Synchronous DC/DC Controller High Efficiency 5V to 3.3V Conversion at Up to 15A, SO-8 Package
LTC1628/LTC1628-PG/ 2-Phase, Dual Output Synchronous Step-Down Reduces C
IN
and C
OUT
, Power Good Output Signal, Synchronizable,
LTC1628-SYNC DC/DC Controllers 3.5V ≤ V
IN
≤ 36V, I
OUT
up to 20A, 0.8V ≤ V
OUT
≤ 5V
LTC1629/LTC1629-PG 20A to 200A PolyPhase Synchronous Controllers Expandable from 2-Phase to 12-Phase, No Heat Sink, V
IN
up to 36V
LTC1702A No R
SENSE
TM
2-Phase Dual Sync Step-Down Controller 550kHz, No Sense Resistor
LTC1703 No R
SENSE
2-Phase Dual Synchronous Step-Down Mobile Pentium
®
III Processors, 550kHz,
Controller with 5-Bit Mobile VID Control V
IN
≤ 7V
LTC1708-PG 2-Phase, Dual Synchronous Controller with Mobile VID 3.5V ≤ V
IN
≤ 36V, VID Sets V
OUT1
, PGOOD
LT
®
1709/ High Efficiency, 2-Phase Synchronous Step-Down 1.3V ≤ V
OUT
≤ 3.5V, Current Mode Ensures
LT1709-8 Switching Regulators with 5-Bit VID Accurate Current Sharing, 3.5V ≤ V
IN
≤ 36V
LTC1735 High Efficiency Synchronous Step-Down Regulator Output Fault Protection, 16-Pin SSOP
LTC1736 High Efficiency Synchronous Controller with VID Control Output Fault Protection, 24-Pin SSOP, 3.5V ≤ V
IN
≤ 36V
LTC1778 No R
SENSE
Current Mode Sync Step-Down Controller ≤97% Efficiency, 4V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ (0.9) (V
IN
),
I
OUT
≤ 20A
LTC1929 2-Phase Synchronous Controllers Up to 42A, No Heat Sinks, 3.5V ≤ V
IN
≤ 36V
LTC3711 No R
SENSE
Current Mode Synchronous Step-Down Up to 97% Efficiency, Ideal for Pentium III Processors,
Controller with Digital 5-Bit Interface 0.925V ≤ V
OUT
≤ 2V, 4V ≤ V
IN
≤ 36V, I
OUT
up to 20A
LTC3729 20A to 200A, 550kHz PolyPhase Synchronous Controller Expandable from 2-Phase to 12-Phase, V
IN
up to 36V
LTC3730 3-Phase, 5-Bit Intel Mobile VID 0.6V ≤ V
OUT
≤ 1.75V, IMVP3 Compatible
600kHz Synchronous Step-Down Controller Up to 60A Output Current, Integrated MOSFET Drivers
LTC3731 3-Phase 600kHz Synchronous Step-Down Controller 0.6V ≤ V
OUT
≤ 6V, 4.5V ≤ V
IN
≤ 32V
I
OUT
up to 60A, Integrated MOSFET Drivers
LTC3778 Optional R
SENSE
Current Mode Synchronous 4V ≤ V
IN
≤ 36V, Adjustable Frequency up to 1.2MHz,
Step-Down Controller TSSOP-20 Package
RELATED PARTS
0.01µF
10k
VID1 IN
SYNC IN
300kHz
27pF
1000pF
S1
+
S1
–
S2
+
5V
5V
S2
–
S3
–
S3
+
VID1
PLLIN
PLLFLTR
FCB
IN
+
IN
–
DIFFOUT
LTC3732
EAIN
SGND
SENSE1
+
SENSE1
–
SENSE2
+
SENSE2
–
SENSE3
–
SENSE3
+
RUN/SS
I
TH
VID2
VID0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
PGOOD
BOOST1
TG1
SW1
BOOST2
TG2
SW2
V
CC
BG1
PGND
BG2
BG3
SW3
TG3
BOOST3
VID4
VID3
1000pF
OPTIONAL FOR
SYNCHRONIZATION
100Ω, 1%
14.7k
V
CC
5V TO 7V
V
IN
M1
M2 D1
S1
+
S1
–
L1
0.002Ω
3.3nF
2.2k
330pF
0.01µF
11.8k
60.4k
1000pF
1µF
VID0 IN
VID4 IN
VID3 IN
3732 TA01
V
IN
: 5V TO 20V
V
OUT
: 1.1V TO 1.85V, 65A
SWITCHING FREQUENCY: 300kHz
C
IN
: SANYO OS-CON 25SP68M
C
OUT
: 270µF/2V ×6 PANASONIC SP EEFSDOD271R
L1 TO L3: 0.8µH SUMIDA CEP125-0R8
M1, M3, M5: IRF7811W ×2 OR FDS6688 ×2
M2, M4, M6: IRF7822 ×2 OR Si7892DP ×2
PGOOD
47k
1Ω
1000pF
VID2 IN
10µF
0.1µF
V
CC
0.1µF
0.1µF
V
CC
V
CC
V
IN
M3
M4 D2
S2
+
S2
–
L2
0.002Ω
V
IN
M5
M6 D3
S3
+
S3
–
L3
0.002Ω
10µF
6.3V
×3
C
OUT
V
IN
3.3V TO 20V
V
OUT
+
10µF
25V
×5
C
IN
68µF
25V
+
V
RON
BAT54
2N3904
PIN #s SHOWN ARE FOR THE 36 PIN SSOP PACKAGE
Figure 14. VRM9.0/9.1 65A Power Supply for Pentium
®
4 Processors
No R
SENSE
is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.
APPLICATIO S I FOR ATIO
WUUU
