LTC3731CG datasheet(2/32 Pages) LINER

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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

TOP VIEW

G PACKAGE

36-LEAD PLASTIC SSOP

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

10 11 12 13 14 15 16

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

● 0.594

0.600

0.606

LTC3731IG

● 0.591

0.609

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