LTC3731 データシートの表示（PDF） - Linear Technology

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LTC3731

3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller

Linear Technology 

LTC3731

ABSOLUTE AXI U RATI GS (Note 1)

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

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

UW U

PACKAGE/ORDER I FOR ATIO

TOP VIEW

VCC 1

PLLIN 2

PLLFLTR 3

FCB 4

IN+ 5

IN– 6

DIFFOUT 7

EAIN 8

SGND 9

SENSE1+ 10

SENSE1– 11

SENSE2+ 12

SENSE2– 13

SENSE3– 14

SENSE3+ 15

RUN/SS 16

ITH 17

UVADJ 18

36 CLKOUT

35 PGOOD

34 BOOST1

33 TG1

32 SW1

31 BOOST2

30 TG2

29 SW2

28 VDR

27 BG1

26 PGND

25 BG2

24 BG3

23 SW3

22 TG3

21 BOOST3

20 PHASMD

19 SGND2

G PACKAGE

36-LEAD PLASTIC SSOP

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

ORDER PART

NUMBER

LTC3731CG

LTC3731IG

32 31 30 29 28 27 26 25

IN– 1

24 BOOST2

DIFFOUT 2

EAIN 3

SENSE1+ 4

SENSE1– 5

SENSE2+ 6

SENSE2– 7

SENSE3– 8

23 TG2

22 SW2

21 VCC

33

20 BG1

19 PGND

18 BG2

17 BG3

9 10 11 12 13 14 15 16

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

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

ORDER PART

NUMBER

LTC3731CUH

LTC3731IUH

UH PART

NUMBER

3731

3731I

ELECTRICAL CHARACTERISTICS 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.

SYMBOL

PARAMETER

Main Control Loop

VREGULATED Regulated Voltage at IN+

CONDITIONS

VITH = 1.2V (Note 3)

LTC3731IG

MIN TYP MAX UNITS

0.596 0.600 0.604

V

● 0.594 0.600 0.606

V

● 0.591

0.609

V

3731fa

2

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