Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - voltage regulators - DC DC switch controllers PolyPhase® SSOP 24

24

LTC3736-1

37361f

SGND

FREQ

IPRG2

IPRG1

V

FB1

I

TH1

SW1

R

VIN

10Ω

R

ITH2

22k

C

ITH2

470pF

C

SS

10nF

C

IN

22µF

C

VIN

1µF

V

IN

3.3V

V

IN

C

ITH2A

47pF

R

ITH1

22k

C

ITH1

470pF

C

ITH1A

47pF

R

FB1B

187k

R

FB1A

59k

PGOOD

V

FB2

TRACK

PGND

I

TH2

TG2

LTC3736EUF-1

PGND

TG1

SSDIS

BG1

PGND

22

21

20

19

18

17

16

15

14

13

12

11

10

25

23

24

1

2

3

4

5

9

8

7

6

SENSE1

+

MP1

MP2

L1

1.5µH

L2

1.5µH

MN1

Si7540DP

MN2

Si7540DP

RUN/SS

BG2

PGND

SW2

SENSE2

+

R

TRACKB

1.18k

R

TRACKA

590Ω

R

FB2A

59k

R

FB2B

118k

C

OUT2

100µF

C

OUT1

100µF

V

OUT1

2.5V

2A

V

OUT2

1.8V

2A

37361 F14

L1, L2: VISHAY IHLP-2525CZ-01

C

OUT1

, C

OUT2

: MURATA GRM32EROJ107M

2200pF

68pF

100pF

Figure 14. 2-Phase, Spread Spectrum, Dual Output Synchronous DC/DC Converter with Ceramic Output Capacitors

TYPICAL APPLICATIO S

U

Efficiency vs Load Current

LOAD CURRENT (mA)

EFFICIENCY (%)

100

60

90

80

70

1 100 1000 10000

37361 F14b

0

50

10

40

30

20

10

V

OUT

= 2.5V

V

OUT

= 1.8V

V

OUT

AC-COUPLED

100mV/DIV

V

OUT

= 2.5V

I

LOAD

= 100mA TO 1A

100µs/DIV

37361 F14c

I

L

1A/DIV

V

OUT

AC-COUPLED

50mV/DIV

V

OUT

= 1.8V

I

LOAD

= 100mA TO 1A

100µs/DIV

37361 F14d

I

L

1A/DIV

Load Step Load Step