LTC3609EWKG(RevB) View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC3609EWKG
(Rev.:RevB)

32V, 6A Monolithic Synchronous Step-Down DC/DC Converter

Linear Technology 

LTC3609

Typical Applications

5V to 32V Input to 1.8V/6A All Ceramic 1MHz

INTVCC

CVCC

4.7µF

6.3V

VIN

CF

RF1

0.1µF 1Ω

50V

SW

GND

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

VOUT

1.8V AT

6A

GND

COUT1

100µF

x2

L1

0.47µH

VIN

VIN

5V TO 32V

CIN

4.7µF

x2

41 SW

42 SW

43 SW

44 SW

45 SW

46 SW

47 SW

48 PVIN

49 PVIN

50 PVIN

51 PVIN

52 PVIN

LTC3609

SGND 26

NC 25

NC 24

VFB 23

ION 22

NC 21

SGND 20

FCB 19

ITH 18

VRNG 17

PGOOD 16

SGND 15

EXTVCC

C4

0.01µF

R2

20k

1%

R1

10k

1% RON

102k

1%

VOUT

VIN

INTVCC

JP1

R5

CC1

1500pF

5.76k

RPG1

100k

CC2

100pF

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

C5: TAIYO YUDEN JMK316BJ226ML-T

CIN: MURATA GRM32ER71H475K

COUT: MURATA GRM32ER60J107M

LI: 1HLP25CZERR80M01

KEEP POWER GROUND AND SIGNAL

GROUND SEPARATE. CONNECT AT

ONE POINT.

SW

2Ω

INTVCC

DB

CMDSH-3

CB1

0.22µF

SW

CSS

0.1µF

CVON

0.1µF

PGOOD

SGND

INTVCC

VOUT

3609 TA04

IL

5A/DIV

Transient Response

VOUT

200mV/DIV

20µs/DIV

LOAD STEP 500mA TO 4A

VIN = 12V

VOUT = 1.8V

FCB = 0V

3609 TA04b

100

90

80

70

60

50

40

30

20

10

0

10

Efficiency vs Load Current

100

1000

LOAD CURRENT (mA)

10000

3609 TA04c

3609fb

23

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