32
LTC1735
1735fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 1998
LT/TP 0104 REV C 1K • PRINTED IN USA
TYPICAL APPLICATIO
U
3.3V to 2.5V/5A Converter with External Clock Synchronization Operating at 500kHz
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
C
OSC
RUN/SS
I
TH
FCB
SGND
V
OSENSE
SENSE
–
SENSE
+
TG
BOOST
SW
V
IN
INTV
CC
BG
PGND
EXTV
CC
LTC1735
C
SS
0.1µF
C
B
0.1µF
0.1µF
C
C2
51pF
47pF
C
C
330pF
R
C
33k
R
SENSE
0.01Ω
V
OUT
2.5V
5A
1000pF
C
OSC
20pF
+
4.7µF
+
C
OUT
100µF
10V
AVX
×3
M1
Si4410DY
M2
Si4410DY
47pF
1735 TA06
+
C
IN
100µF
10V
OS-CON
D
B
CMDSH-3
R2
43.2k
1%
C
IN
: SANYO OS-CON 10SL100M
C
OUT
: AVX TPSD107M010R0065
L1: COILCRAFT DO3316P-152
R
SENSE
: IRC LR2010-01-R010-F
R1
20k
1%
MBRS140T3
V
IN
3.3V
5V
L1
1.5µH
SGND
EXT
CLOCK
500kHz
PART NUMBER DESCRIPTION COMMENTS
LTC1530 High Power Step-Down Synchronous DC/DC Controller High Efficiency 5V to 3.3V Conversion at Up to 15A
in SO-8
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/LTC3729 20A to 200A PolyPhase Synchronous Controllers Expandable from 2-Phase to 12-Phase, Uses All
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
LTC1736 High Efficiency Synchronous Controller with 5-Bit Mobile Output Fault Protection, 24-Pin SSOP,
VID Control 3.5V ≤ V
IN
≤ 36V
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
≥ 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.
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