28
LTC3729L-6
sn3729l6 3729l6fs
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2003
LT/TP 0403 2K • PRINTED IN USA
TYPICAL APPLICATIO
U
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC1530 High Power Step-Down Synchronous DC/DC Controller in SO-8 High Efficiency 5V to 3.3V Conversion at Up to 15A
LTC1628/LTC3728 2-Phase, Dual Output Synchronous Step-Down Reduces C
IN
and C
OUT
, Power Good Output Signal, Synchronizable,
DC/DC Controllers 3.5V ≤ V
IN
≤ 36V, I
OUT
up to 20A, 0.8V ≤ V
OUT
≤ 5V
LTC1629/LTC1629-6 20A to 200A PolyPhase Synchronous Controllers Expandable from 2-Phase to 12-Phase, Uses All
LTC3729 Surface Mount Components, No Heat Sink, V
IN
up to 36V
LTC1702 No R
SENSE
TM
2-Phase Dual Synchronous Step-Down 550kHz, No Sense Resistor
Controller
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 Output Fault Protection, 16-Pin SSOP
Switching Regulator
LTC1778 No R
SENSE
Current Mode Synchronous Step-Down Up to 97% Efficiency, 4V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ (0.9)(V
IN
),
Controller I
OUT
up to 20A
LTC1929/ 2-Phase Synchronous Controllers Up to 42A, Uses All Surface Mount Components,
LTC1929-PG 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, Uses all Surface Mount
Components, V
IN
up to 36V
LTC3730 IMVP III 3-Phase Synchronous Controller I
OUT
Up to 60A, 0.6V ≤ V
OUT
≤ 1.75V, Integrated MOSFET Drivers
LTC3732 VRM 9.0/9.1 3-Phase DC/DC Synchronous Step-Down 1.1V ≤ V
OUT
≤ 1.85V, 4.5V ≤ V
IN
≤ 32V, SSOP-36
Controller
LTC3778 Optional R
SENSE
Current Mode Synchronous Step-Down 4V ≤ V
IN
≤ 36V, Adjustable Frequency Up to 1.2MHz, TSSOP-20
Controller
LTC3832 Low V
IN
High Power Synchronous Controller V
OUT
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≤ 20A, 3V ≤ V
IN
≤ 8V
LTC4008 4A Multichemistry Multicell Battery Charger NiCd, NiMH, Lead Acid, Li-Ion Batteries; 6V ≤ V
IN
≤ 28V;
1.19V ≤ V
OUT
≤ 28V
No R
SENSE
is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.
V
IN
: 5V TO 16V
V
OUT
: 3.3V/30A
SWITCHING FREQUENCY = 450kHz
MI, M3: FDS7764
M2, M4: FDS7764 ×2
L1, L2: 1µH SUMIDA CEP125-1R0MC
C
IN
: OS CON 2-16SP270M
C
OUT
: POS CAP THREE 4TPB470M
D3, D4: CENTRAL CMDSH-3TR
INTV
CC
LTC3729L-6
M4M3
0.1µF 17.8k
6.04k
1%
10k
3.3k
27.4k
1%
1000pF
1000pF
1000pF
100pF
100pF
M2M1
D1
SBM540
D2
SBM540
0.47µF
POWER
GOOD
100k
4.7µF
6.3V
+
0.1µF
1µF, 6.3V
5V
D4
D3
10Ω
0.47µF
V
OUT
3.3V/30A
V
IN
5V TO
16V
+
L1
L2
3729L-6 TA02
1000pF
C
OUT
+
C
IN
0.003Ω
0.003Ω
CLKOUT
TG1
SW1
BOOST1
BG1
EXTV
CC
INTV
CC
PGND
BG2
BOOST2
SW2
TG2
PGOOD
RUN/SS
SENSE1
+
SENSE1
–
EAIN
PLLFLTR
PLLIN
PHASMD
I
TH
SGND
V
DIFFOUT
V
OS
–
V
OS
+
SENSE2
–
SENSE2
+
V
IN
Figure 12. 3.3V/30A Power Supply with Active Voltage Positioning
