Linear Technology LTC3729, Manual

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LTC3729
sn3729 3729fas
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com

LINEAR TECHNOLOGY CORPORATION 2001
LT/CPI 0302 1.5K REV A • PRINTED IN USA
TYPICAL APPLICATIO
U
RELATED PARTS
V
IN
: 5V TO 16V
V
OUT
: 3.3V/30A
SWITCHING FREQUENCY = 250kHz
MI, M3: IRF7811
M2, M4: IRF7809
L1, L2: 1
µ
H SUMIDA CEP125-1R0MC-H
C
IN
: OS CON 2-16SP270M
C
OUT
: KEMET 3-T510 470
µ
F
D3, D4: CENTRAL CMDSH-3TR
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CLKOUT
TG1
SW1
BOOST1
V
IN
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
+
LTC3729
M4 M3
0.1
µ
F
13.2k
3.3k
16.5k
1000pF
1000pF
1000pF
100pF
33pF
M2 M1
D1
UPS840
D2
UPS840
0.47
µ
F
POWER
GOOD
100k
4.7
µ
F
6.3V +
0.1
µ
F
1
µ
F,6.3V
5V
D4
D3
10
Ω
0.47
µ
F
V
OUT
3.3V/30A
V
IN
5V TO
16V
+
L1
0.003
Ω
L2
0.003
Ω
3729TA02
C
OUT
+
C
IN
Figure 12. 3.3V/30A Power Supply with Active Voltage Positioning
PART NUMBER DESCRIPTION COMMENTS
LTC1436A-PLL Low Noise Synchronous Step-Down Switching Regulator Adaptive Power
TM
Mode, 24-Pin SSOP
LTC1438/LTC1439 Dual Low Noise Synchronous Step-Down Switching Regulators POR, Auxiliary Regulator
LTC1438-ADJ Dual Synchronous Controller with Auxiliary Regulator POR, External Feedback Divider
LTC1530 High Power Step-Down Switching Regulator Controller High Efficiency 5V to 3.3V Conversion
at Up to 15A
LTC1538-AUX/ Dual Low Noise Synchronous Step-Down Switching Regulators 5V Standby, POR, Low-Battery,
LTC1539 Aux Regulator
LTC1628/LTC1628-PG 2-Phase, Dual Output Synchronous Step-Down DC/DC Controller Constant Frequency, Standby,
LTC1828-SYNC 5V and 3.3V LDOs, Power Good
LTC1702/LTC1703 Dual PolyPhase Synchronous Step-Down Switching Regulator 500kHz, 25MHz GBW, Voltage Mode
LTC1708-PG Dual PolyPhase Synchronous Step-Down Switching Regulator Constant Frequency, 5-Bit VID,
Standby 5V, 3.3V, Power Good
LTC1709/LTC1709-7 2-Phase Synchronous Step-Down Switching Regulators with 5-Bit VID Current Mode Ensures
LTC1709-8/LTC1709-9 Accurate Current Sharing, 3.5V
≤
V
IN
≤
36V
LTC1735 Synchronous Step-Down Controller Burst Mode
®
Operation, 16-Pin Narrow SSOP,
Fault Protection, 3.5V
≤
V
IN
≤
36V
LTC1736 Synchronous Step-Down Controller with 5-Bit VID Output Fault Protection, Power Good,
24-Pin SSOP, 3.5V
≤
V
IN
≤
36V
LTC1778 No R
SENSE
Current Mode Synchronous Step-Down Controller Up to 97% Efficiency, 4V
≤
V
2V
≤
36V,
0.8V
≤
V
OUT
≤
(0.9)(V
IN
), I
OUT
up to 20A
LTC1929/LTC1929-PG 2-Phase Synchronous Controllers Low Cost, 2-Phase Current Mode
LTC3728 550kHz, 2-Phase Dual Output Synchronous Step-Down Controller Synchronizable, Current Mode, 3.5V
≤
V
IN
≤
36V
SSOP and QFN Packages
Burst Mode is a registered trademark of Linear Technology Corporation. Adaptive Power is a trademark of Linear Technology Corporation.