LTC1735CGN-1 データシートの表示（PDF） - Linear Technology

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LTC1735CGN-1

High Efficiency Synchronous Step-Down Switching Regulator

Linear Technology 

LTC1735-1

TYPICAL APPLICATIO

High Efficiency Dynamic Output Voltage Selectable CPU Power Supply for SpeedStep Enabled Processors

PGOOD RUN

INTVCC

R7

100k

COSC 47pF

CC2 330pF

CSS 0.1µF

RC1 33k

CC1 47pF

C1

47pF

CS1

1000pF

JP1

LATCH-OFF R6

DISABLE 680k

CF1

0.1µF

1

COSC

2

RUN/SS

16

TG

15

BOOST

3

14

ITH LTC1735-1 SW

4

PGOOD

13

VIN

5 SENSE –

12

INTVCC

6 SENSE +

11

BG

7

VOSENSE

8

SGND

10

PGND

9

EXTVCC

R5 10Ω

VIN

4.5V TO 24V

R8

4.7Ω

CB 0.22µF

D1

CMDSH-3

+ C2

C4

4.7µF

1µF

5V

INPUT

(OPTIONAL)

Q1

FDS6680A

L1

1.2µH

D2

MBRS340T3

Q2, Q3

FDS6680A

×2

R4 10Ω

CIN

22µF

50V

CERAMIC

×2

CIN: MARCON THCR70E1H226ZT

COUT: PANASONIC EEFVE06181R

L1: PANASONIC ETQP6F1R2HFA

RSENSE: IRC CRF2512-01-R004F

RSENSE

0.004Ω

C2

47pF

C3

47pF

R2

14.3k

0.5%

R1

10k

0.5% +

R3

33.2k

1%

Q4

2N7002

VOUT

1.35V OR 1.60V

12A

COUT

180µF

4V

SP

×4

VSEL = 1: VOUT = 1.60V

VSEL = 0: VOUT = 1.35V

GND

1735-1 TA01

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Adaptive Power and PolyPhase are trademarks of Linear Technology Corporation.

28 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

17351f LT/TP 0100 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1999

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