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LTC3728L-1

3728l1fc

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

LT 0708 REV C • PRINTED IN USA

RELATED PARTS

TYPICAL APPLICATION

Figure 14. Multioutput PolyPhase Application

PHASMD

CLKOUT

TG1

TG2

0°

90°

OPEN

180°

LTC3729

BUCK: 2.5V/15A

PLLIN

TG1

TG2

90°

270°

LTC3728L-1

BUCK: 1.5V/15A

2.5VO/30A

CIN

IIN

12VIN

*INPUT RIPPLE CURRENT CANCELLATION

INCREASES THE RIPPLE FREQUENCY AND

REDUCES THE RMS INPUT RIPPLE CURRENT

THUS, SAVING INPUT CAPACITORS

IIN*

1.5VO/15A

1.8VO/15A

3728L1 F14

BUCK: 1.8V/15A

PART NUMBER

DESCRIPTION

COMMENTS

LTC1628/LTC1628-PG/

LTC1628-SYNC

2-Phase, Dual Output Synchronous Step-Down

DC/DC Controller

Reduces CIN and COUT, Power Good Output Signal, Synchronizable,

3.5V ≤ VIN ≤ 36V, IOUT up to 20A, 0.8V ≤ VOUT ≤ 5V

LTC1629/

LTC1629-PG

20A to 200A PolyPhase™ Synchronous Controllers

Expandable from 2-Phase to 12-Phase, Uses All

Surface Mount Components, No Heat Sink, VIN up to 36V

LTC1708-PG

2-Phase, Dual Synchronous Controller with Mobile VID

3.5V ≤ VIN ≤ 36V, VID Sets VOUT1, PGOOD

LT1709/

LT1709-8

High Efﬁciency, 2-Phase Synchronous Step-Down

Switching Regulators with 5-Bit VID

1.3V ≤ VOUT ≤ 3.5V, Current Mode Ensures

Accurate Current Sharing, 3.5V ≤ VIN ≤ 36V

LTC1735

High Efﬁciency Synchronous Step-Down

Switching Regulator

Output Fault Protection, 16-Pin SSOP

LTC1736

High Efﬁciency Synchronous Controller with 5-Bit Mobile

VID Control

Output Fault Protection, 24-Pin SSOP,

3.5V ≤ VIN ≤ 36V

LTC1778/LTC1778-1

No RSENSE Current Mode Synchronous Step-Down

Controllers

Up to 97% Efﬁciency, 4V ≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ (0.9)(VIN),

IOUT up to 20A

LTC1929/

LTC1929-PG

2-Phase Synchronous Controllers

Up to 42A, Uses All Surface Mount Components,

No Heat Sinks, 3.5V ≤ VIN ≤ 36V

LTC3708

Dual, 2-Phase, DC/DC Controller with Output Tracking

Current Mode, No RSENSE, Up/Down Tracking, Synchronizable

LTC3711

No RSENSE Current Mode Synchronous Step-Down

Controller with Digital 5-Bit Interface

Up to 97% Efﬁciency, Ideal for Pentium

® III Processors,

0.925V ≤ VOUT ≤ 2V, 4V ≤ VIN ≤ 36V, IOUT up to 20A

LTC3728

Dual, 550kHz, 2-Phase Synchronous Step-Down

Controller

Dual 180° Phased Controllers, VIN 3.5V to 35V, 99% Duty Cycle,

5x5QFN, SSOP-28

LTC3729

20A to 200A, 550kHz PolyPhase Synchronous Controller

Expandable from 2-Phase to 12-Phase, Uses all Surface Mount

Components, VIN up to 36V

LTC3731

3- to 12-Phase Step-Down Synchronous Controller

60A to 240A Output Current, 0.6V ≤ VOUT ≤ 6V, 4.5V ≤ VIN ≤ 32V

LTC3802

No RSENSE 2-Phase Dual Synchronous Step-Down

Controller

330kHz to 750kHz, No Sense Resistor, Output Voltage Tracking,

Synchronizable for 4-Phase Operation

No RSENSE and PolyPhase are trademarks of Linear Technology Corporation.

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