LTC3732 datasheet(28/28 Pages) LINER

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LTC3732

3732f

LT/TP 0503 1K • PRINTED IN USA

©LINEAR TECHNOLOGY CORPORATION 2002

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

PART NUMBER

DESCRIPTION

COMMENTS

LTC1530

High Power Step-Down Synchronous DC/DC Controller

High Efficiency 5V to 3.3V Conversion at Up to 15A, SO-8 Package

LTC1628/LTC1628-PG/

2-Phase, Dual Output Synchronous Step-Down

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

LTC1628-SYNC

DC/DC Controllers

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, No Heat Sink, VIN up to 36V

LTC1702A

No RSENSE

TM 2-Phase Dual Sync Step-Down Controller

550kHz, No Sense Resistor

LTC1703

No RSENSE 2-Phase Dual Synchronous Step-Down

Mobile Pentium

® III Processors, 550kHz,

Controller with 5-Bit Mobile VID Control

VIN ≤ 7V

LTC1708-PG

2-Phase, Dual Synchronous Controller with Mobile VID

3.5V

≤ VIN ≤ 36V, VID Sets VOUT1, PGOOD

®1709/

High Efficiency, 2-Phase Synchronous Step-Down

1.3V

≤ VOUT ≤ 3.5V, Current Mode Ensures

LT1709-8

Switching Regulators with 5-Bit VID

Accurate Current Sharing, 3.5V

≤ VIN ≤ 36V

LTC1735

High Efficiency Synchronous Step-Down Regulator

Output Fault Protection, 16-Pin SSOP

LTC1736

High Efficiency Synchronous Controller with VID Control

Output Fault Protection, 24-Pin SSOP, 3.5V

≤ VIN ≤ 36V

LTC1778

No RSENSE Current Mode Sync Step-Down Controller

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

IOUT ≤ 20A

LTC1929

2-Phase Synchronous Controllers

Up to 42A, No Heat Sinks, 3.5V

≤ VIN ≤ 36V

LTC3711

No RSENSE Current Mode Synchronous Step-Down

Up to 97% Efficiency, Ideal for Pentium III Processors,

Controller with Digital 5-Bit Interface

0.925V

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

LTC3729

20A to 200A, 550kHz PolyPhase Synchronous Controller

Expandable from 2-Phase to 12-Phase, VIN up to 36V

LTC3730

3-Phase, 5-Bit Intel Mobile VID

0.6V

≤ VOUT ≤ 1.75V, IMVP3 Compatible

600kHz Synchronous Step-Down Controller

Up to 60A Output Current, Integrated MOSFET Drivers

LTC3731

3-Phase 600kHz Synchronous Step-Down Controller

0.6V

≤ VOUT ≤ 6V, 4.5V ≤ VIN ≤ 32V

IOUT up to 60A, Integrated MOSFET Drivers

LTC3778

Optional RSENSE Current Mode Synchronous

≤ VIN ≤ 36V, Adjustable Frequency up to 1.2MHz,

Step-Down Controller

TSSOP-20 Package

RELATED PARTS

0.01

µF

10k

VID1 IN

SYNC IN

300kHz

27pF

1000pF

S1+

S1–

S2+

S2–

S3–

S3+

VID1

PLLIN

PLLFLTR

FCB

IN+

IN–

DIFFOUT

LTC3732

EAIN

SGND

SENSE1+

SENSE1–

SENSE2+

SENSE2–

SENSE3–

SENSE3+

RUN/SS

ITH

VID2

VID0

PGOOD

BOOST1

TG1

SW1

BOOST2

TG2

SW2

VCC

BG1

PGND

BG2

BG3

SW3

TG3

BOOST3

VID4

VID3

1000pF

OPTIONAL FOR

SYNCHRONIZATION

100

Ω, 1%

14.7k

VCC

5V TO 7V

VIN

S1+

S1–

0.002

Ω

3.3nF

2.2k

330pF

0.01

µF

11.8k

60.4k

1000pF

µF

VID0 IN

VID4 IN

VID3 IN

3732 TA01

VIN: 5V TO 20V

VOUT: 1.1V TO 1.85V, 65A

SWITCHING FREQUENCY: 300kHz

CIN: SANYO OS-CON 25SP68M

COUT: 270µF/2V ×6 PANASONIC SP EEFSDOD271R

L1 TO L3: 0.8

µH SUMIDA CEP125-0R8

M1, M3, M5: IRF7811W

×2 OR FDS6688 ×2

M2, M4, M6: IRF7822

×2 OR Si7892DP ×2

PGOOD

47k

Ω

1000pF

VID2 IN

µF

0.1

µF

VCC

0.1

µF

0.1

µF

VCC

VIN

S2+

S2–

0.002

Ω

VIN

S3+

S3–

0.002

Ω

µF

6.3V

×3

COUT

VIN

3.3V TO 20V

VOUT

µF

25V

×5

CIN

µF

25V

VRON

BAT54

2N3904

PIN #s SHOWN ARE FOR THE 36 PIN SSOP PACKAGE

Figure 14. VRM9.0/9.1 65A Power Supply for Pentium

® 4 Processors

No RSENSE is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.

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