LTC3731 datasheet(2/32 Pages) LINER

部件名	LTC3731

功能描述	3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller

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制造商	LINER [Linear Technology]

网页	http://www.linear.com

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LTC3731

3731fa

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

Topside Driver Voltages (BOOSTN) ............ 38V to –0.3V

Switch Voltage (SWN)................................... 32V to –5V

Boosted Driver Voltage (BOOSTN – SWN) .... 7V to –0.3V

Peak Output Current <1ms (TGN, BGN) ..................... 5A

Supply Voltages (VCC, VDR), PGOOD

Pin Voltage .................................................. 7V to –0.3V

RUN/SS, PLLFLTR, PLLIN, UVADJ,

FCB Voltages ............................................. VCC to –0.3V

ORDER PART

NUMBER

LTC3731CG

LTC3731IG

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

TOP VIEW

G PACKAGE

36-LEAD PLASTIC SSOP

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

20

19

VCC

PLLIN

PLLFLTR

FCB

IN+

IN–

DIFFOUT

EAIN

SGND

SENSE1+

SENSE1–

SENSE2+

SENSE2–

SENSE3–

SENSE3+

RUN/SS

ITH

UVADJ

CLKOUT

PGOOD

BOOST1

TG1

SW1

BOOST2

TG2

SW2

VDR

BG1

PGND

BG2

BG3

SW3

TG3

BOOST3

PHASMD

SGND2

TJMAX = 125°C, θJA = 95°C/W, θJC = 32°C/W

Consult LTC Marketing for parts specified with wider operating temperature ranges.

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = VRUN/SS = 5V unless otherwise noted.

ITH Voltage ................................................ 2.4V to –0.3V

Operating Ambient Temperature Range

LTC3731C .................................................... 0°C to 70°C

LTC3731I ................................................. –40°C to 85°C

Junction Temperature (Note 2) ............................. 125°C

Storage Temperature Range ..................–65°C to 150°C

Lead Temperature G Package (Soldering, 10sec) .. 300°C

Peak Body Temperature UH Package ................... 240°C

(Note 1)

ORDER PART

NUMBER

LTC3731CUH

LTC3731IUH

UH PART

NUMBER

3731

3731I

32 31 30 29 28 27 26 25

9

10 11 12 13 14 15 16

17

18

19

20

21

22

23

24

33

8

7

6

5

4

3

2

1

IN–

DIFFOUT

EAIN

SENSE1+

SENSE1–

SENSE2+

SENSE2–

SENSE3–

BOOST2

TG2

SW2

VCC

BG1

PGND

BG2

BG3

UH PACKAGE

32-LEAD PLASTIC QFN

EXPOSED PAD (PIN 33) IS SIGNAL GROUND

(SGND) AND MUST BE SOLDERED TO PCB

TJMAX = 125°C, θJA = 34°C/W

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loop

VREGULATED

Regulated Voltage at IN+

VITH = 1.2V (Note 3)

0.596

0.600

0.604

V

● 0.594

0.600

0.606

V

LTC3731IG

● 0.591

0.609

V

类似零件编号 - LTC3731

制造商	部件名	数据表	功能描述
Linear Technology	LTC3731	312Kb / 26P	Dual, 2-Phase Step-Down Switching Controller Programmable Soft-Start
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类似说明 - LTC3731

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ON Semiconductor	NCP5380	498Kb / 27P	7-Bit, Programmable, Single-Phase, Synchronous Buck Switching Regulator Controller May, 2009 ??Rev. 0