LTC1929IG データシートの表示（PDF） - Linear Technology

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LTC1929IG

2-Phase, High Efficiency, Synchronous Step-Down Switching Regulators

Linear Technology 

LTC1929/LTC1929-PG

TYPICAL APPLICATIO

0.1µF

1000pF

2.7k

INTVCC

15k

10k

51k

47k

3.3nF

100pF

470pF

10k

15k

1000pF

LTC1929-PG

1

RUN/SS

28

NC

2 SENSE1+

27

TG1

3 SENSE1–

26

SW1

4

EAIN

25

BOOST1

0.22µF

5

PLLFLTR

6

PLLIN

24

VIN

23

BG1

7

NC

8

ITH

9

SGND

22

EXTVCC

5V (OPT)

21

INTVCC

20

PGND

10µF

10

VDIFFOUT

19

BG2

11

VOS–

18

BOOST2

12

VOS+

17

SW2

13 SENSE2–

16

TG2

14 SENSE2+

15

PGOOD

0.22µF

100k

PGOOD

L1

0.004Ω

M1

M2

10Ω

CIN

47µF 35V

0.1µF

M3

M4

D1

MBRS140T3

+

COUT

D2

MBRS140T3

VIN

5V TO 28V

1929 F13

0.004Ω

L2

VOUT

2V

20A

SWITCHING FREQUENCY = 200kHz

CIN: 5A RIPPLE CURRENT RATING REQUIRED

COUT: 4 × 180µF/4V PANASONIC SP

L1 TO L2: 1.5µH SUMIDA CEP125-1R5MC

M1 TO M4: FAIRCHILD FDS7760A

Figure 13. 2V/20A CPU Power Supply with Active Voltage Positioning

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PART NUMBER

DESCRIPTION

COMMENTS

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Adaptive Power and Burst Mode are trademarks of Linear Technology Corporation.

Burst Mode Operation, 16-Pin Narrow SSOP,

Fault Protection, 3.5V ≤ VIN ≤ 36V

Output Fault Protection, Power Good, GN-24,

3.5V ≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ 6V

28 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

1929f LT/TP 0500 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1999

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