LTC3729L-6 Datasheet, PDF (28/28 Pages) Linear Technology – PolyPhase, Synchronous Step-Down Switching Regulator

LTC3729L-6
TYPICAL APPLICATIO
6.04k
1%
INTV_CC
0.1µF
10k
17.8k
1000pF
100pF
1000pF
3.3k
1000pF
27.4k
1%
100pF
1000pF
RUN/SS
SENSE1⁺
SENSE1^–
CLKOUT
TG1
SW1
EAIN
BOOST1
PLLFLTR
V_IN
PLLIN
BG1
PHASMD
EXTV_CC
5V
I_TH
INTV_CC
SGND ^LTC3729L-6 PGND
V_DIFFOUT
V_OS–
V_OS+
SENSE2^–
SENSE2⁺
BG2
BOOST2
SW2
TG2
PGOOD
0.47µF
D3
1µF, 6.3V
L1
0.003Ω
M1
10Ω
0.1µF
4.7µF
6.3V
M2
C_IN
D1
SBM540
C_OUT
D4
100k
0.47µF
POWER
GOOD
D2
SBM540
M3
M4
L2
0.003Ω
V_IN
5V TO
16V
V_OUT
3.3V/30A
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
Figure 12. 3.3V/30A Power Supply with Active Voltage Positioning
3729L-6 TA02
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
DC/DC Controllers
LTC1629/LTC1629-6 20A to 200A PolyPhase Synchronous Controllers
LTC3729
LTC1702
No R_SENSE^TM 2-Phase Dual Synchronous Step-Down
Controller
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
LTC1708-PG
LT^®1709/
LT1709-8
LTC1735
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
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
LTC3730
LTC3732
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
IMVP III 3-Phase Synchronous Controller
VRM 9.0/9.1 3-Phase DC/DC Synchronous Step-Down
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
I_OUT Up to 60A, 0.6V ≤ V_OUT ≤ 1.75V, Integrated MOSFET Drivers
1.1V ≤ V_OUT ≤ 1.85V, 4.5V ≤ V_IN ≤ 32V, SSOP-36
LTC3778
Optional R_SENSE Current Mode Synchronous Step-Down
Controller
4V ≤ V_IN ≤ 36V, Adjustable Frequency Up to 1.2MHz, TSSOP-20
LTC3832
Low V_IN High Power Synchronous Controller
V_OUT ≥ 0.6V, I_OUT ≤ 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.
sn3729l6 3729l6fs
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
LT/TP 0403 2K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2003