LTC3608IWKG-PBF 查看數據表（PDF） - Linear Technology

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LTC3608IWKG-PBF

18V, 8A Monolithic Synchronous Step-Down DC/DC Converter

Linear Technology 

LTC3608

TYPICAL APPLICATIONS

5V to 18V Input to 1.2V/8A at 550kHz

PGND

INTVCC

CVCC

4.7μF

6.3V

SW

RF1

1Ω

CF

0.47μF

25V

40 39 38 37 36 35 34 33 32 31 30 29 28 27

VIN2

EXTVCC

C4

0.01μF

SGND

VOUT

1.2V AT

8A

C5

22μF

6.3V

(OPTIONAL)

GND

COUT1 +

100μF

×2

L1

0.5μH

VIN

5V TO 18V

VIN

GND

CIN

C6 +

10μF

10μF

25V

35V

3×

(OPTIONAL)

41 SW

42 SW

43 SW

44 SW

45 SW

46 SW

47 SW

48

PVIN

49 PVIN

50 PVIN

51 PVIN

52 PVIN

LTC3608

SGND 26

NC 25

R1

30k

NC 24

1%

VFB 23

ION 22

21

NC

SGND 20

FCB 19

ITH 18

VRNG 17

PGOOD 16

SGND 15

1 2 3 4 5 6 7 8 9 10 11 12 13 14

C5: TAIYO YUDEN JMK316BJ226ML-T

CIN: TAIYO YUDEN TMK432BJ106MM

COUT1: TDKC4532X5R107M

L1: CDEP85NP-R50MC-125

KEEP POWER GROUND AND SIGNAL GROUND SEPARATE.

CONNECT AT ONE POINT.

= PGND

INTVCC

DB

CMDSH-3

CB1

0.22μF

CSS

0.1μF

RSS1

510k

VIN

(OPTIONAL)

C1

(OPTIONAL) RON

187k

1%

R2

30.1k

1%

CON

0.01μF

(OPTIONAL)

(OPTIONAL)

C2

VOUT

VIN

R5

7.68k

CC1

1500pF

RPG1

100k

INTVCC

VOUT

RVON

0.1μF (OPTIONAL)

CC2

100pF

SGND

CVON

VOUT

3608 TA03

= SGND

Transient Response

IL

5A/DIV

VOUT

200mV/DIV

200mV

LOAD STEP 1A-8A

VIN = 12V

VOUT = 1.2V

FCB = 0V

3608 TA03a

Efficiency vs Load Current

90

VIN = 12V

85 FREQ = 550kHz

80

75

70

DCM

OCM

65

60

55

50

100

1000

1000

LOAD CURRENT (A)

10000

3608 TA03b

3608fa

21

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