Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - voltage regulators - DC DC switch controllers SSOP 28

30

LTC1628-SYNC

1628syncfa

TYPICAL APPLICATIO S

U

Figure 13. LTC1628-SYNC 5V/4A, 3.3V/4A Regulator with External Frequency Synchronization

0.1µF

4.7µF

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

+

22µF

50V

D1

MBRM

140T3

D2

MBRM

140T3

M1A M1B

M2A M2B

1µF

10V

0.1µF

10Ω

0.015Ω

0.015Ω

f

SYNC

3.3V

0.1µF

10k

105k

1%

33pF

15k

33pF

15k

220pF

220pF

0.01µF

1000pF

1000pF

1000pF

0.1µF

20k

1%

63.4k

1%

20k

1%

RUN/SS1

SENSE1

+

SENSE1

–

V

OSENSE1

PLLFLTR

PLLIN

FCB

I

TH1

SGND

3.3V

OUT

I

TH2

V

OSENSE2

SENSE2

–

SENSE2

+

PGOOD

TG1

SW1

BOOST1

V

IN

BG1

EXTV

CC

INTV

CC

PGND

BG2

BOOST2

SW2

TG2

RUN/SS2

LTC1628-SYNC

L1

8µH

L2

8µH

47µF

6.3V

56µF, 4V

GND

V

OUT2

3.3V

3A; 4A PEAK

V

OUT1

5V

3A; 4A PEAK

V

IN

5.2V TO

28V

1628 F13

+ +

V

IN

: 5.2V TO 28V

V

OUT

: 5V, 4A/3.3V, 4A

SWITCHING FREQUENCY = 300kHz

MI, M2: FDS8936A

L1, L2: 8µH SUMIDA CEP1238R0MC

OUTPUT CAPACITORS: PANASONIC SP SERIES

27pF

27pF

0.1µF

CMDSH-3TR

CMDSH-3TR

PGOOD

V

PULL-UP

(<7V)