LTC3728LX Linear Technology, LTC3728LX Datasheet - Page 32

• Manufacturer Part Number: LTC3728LX
• Description: 2-Phase Synchronous Regulators
• Manufacturer: Linear Technology

LTC3728L/LTC3728LX
RELATED PARTS
PART NUMBER
LTC1628/LTC1628-PG/ 2-Phase, Dual Output Synchronous Step-Down
LTC1628-SYNC
LTC1629/
LTC1629-PG
LTC1702A
LTC1708-PG
LT1709/
LT1709-8
LTC1735
LTC1736
LTC1778/LTC1778-1
LTC1929/
LTC1929-PG
LTC3708
LTC3711
LTC3728
LTC3729
LTC3731
No R
32
TYPICAL APPLICATIO
SENSE
and PolyPhase are trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
OPEN
90
90
DESCRIPTION
DC/DC Controller
20A to 200A PolyPhase
No R
Controller
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
High Efficiency Synchronous Controller with 5-Bit Mobile Output Fault Protection, 24-Pin SSOP,
VID Control
No R
Controllers
2-Phase Synchronous Controllers
Dual, 2-Phase, DC/DC Controller with Output Tracking
No R
Controller with Digital 5-Bit Interface
Dual, 550kHz, 2-Phase Synchronous Step-Down
Controller
20A to 200A, 550kHz PolyPhase Synchronous Controller Expandable from 2-Phase to 12-Phase, Uses all Surface Mount
3- to 12-Phase Step-Down Synchronous Controller
PHASMD
CLKOUT
PLLIN
SENSE
SENSE
SENSE
LTC3728LX
LTC3728L/
LTC3729
U1
U2
2-Phase Dual Synchronous Step-Down
Current Mode Synchronous Step-Down
Current Mode Synchronous Step-Down
TG1
TG2
TG1
TG2
0
180
90
270
U
TM
Figure 14. Multioutput PolyPhase Application
Synchronous Controllers
www.linear.com
I
I
I
I
1
2
3
4
BUCK: 2.5V/15A
BUCK: 2.5V/15A
BUCK: 1.5V/15A
BUCK: 1.8V/15A
I
IN
2.5V
1.5V
1.8V
3728 F14
O
O
O
/30A
/15A
/15A
COMMENTS
Reduces C
Expandable from 2-Phase to 12-Phase, Uses All
Surface Mount Components, No Heat Sink, V
550kHz, No Sense Resistor
1.3V V
Accurate Current Sharing, 3.5V V
Output Fault Protection, 16-Pin SSOP
3.5V V
I
Up to 42A, Uses All Surface Mount Components,
No Heat Sinks, 3.5V V
Current Mode, No R
0.925V V
5x5QFN, SSOP-28
Components, V
60A to 240A Output Current, 0.6V V
3.5V V
Up to 97% Efficiency, 4V V
Up to 97% Efficiency, Ideal for Pentium
Dual 180 Phased Controllers, V
3.5V V
OUT
C
IN
up to 20A
12V
IN
OUT
IN
IN
IN
IN
OUT
and C
36V, VID Sets V
36V
36V, I
*INPUT RIPPLE CURRENT CANCELLATION
3.5V, Current Mode Ensures
INCREASES THE RIPPLE FREQUENCY AND
REDUCES THE RMS INPUT RIPPLE CURRENT
THUS, SAVING INPUT CAPACITORS
IN
I
2V, 4V V
up to 36V
IN
OUT
I
I
I
I
*
1
2
3
4
OUT
SENSE
, Power Good Output Signal, Synchronizable,
up to 20A, 0.8V V
IN
, Up/Down Tracking, Synchronizable
IN
36V
OUT1
IN
IN
36V, I
, PGOOD
36V, 0.8V V
LINEAR TECHNOLOGY CORPORATION 2002
3.5V to 35V, 99% Duty Cycle,
IN
LT/TP 0104 1K REV A • PRINTED IN USA
OUT
www.DataSheet4U.com
OUT
®
36V
III Processors,
up to 20A
OUT
6V, 4.5V V
IN
up to 36V
OUT
5V
(0.9)(V
IN
IN
32V
),
3728lxfa