LTC3732CG datasheet(2/28 Pages) LINER

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LTC3732

3732f

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 Voltage (VCC), PGOOD

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

RUN/SS, PLLFLTR, PLLIN, FCB Voltages .. VCC to –0.3V

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

The q 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

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loop

VREGULATED

Regulated Voltage at IN+

(Note 3); VID Code = 11111, VITH = 1.2V

1.067

1.075

1.083

1.064

1.075

1.086

VSENSEMAX

Maximum Current Sense Threshold

VEAIN = 0.5V, VITH Open,

VSENSE1–, VSENSE2–, VSENSE3– = 0.6V, 1.8V

IMATCH

Current Match

Worst-Case Error at VSENSE MAX

–5

VLOADREG

Output Voltage Load Regulation

(Note 3)

Measured in Servo Loop,

∆ITH Voltage = 1.2V to 0.7V

0.1

0.5

Measured in Servo Loop,

∆ITH Voltage = 1.2V to 2V

–0.1

–0.5

VREFLNREG

Output Voltage Line Regulation

VCC = 4.5V to 7V

0.03

%/V

Operating Ambient Temperature Range ....... 0

°C to 70°C

Junction Temperature (Notes 2, 3, 7) ................... 125

°C

Storage Temperature Range ..................–65

°C to 150°C

Lead Temperature (Soldering, 10 sec)

SSOP Package .................................................. 300

°C

Reflow Peak Body Temperature

QFN Package .................................................... 240

°C

(Note 1)

ORDER PART

NUMBER

LTC3732CG

TOP VIEW

G PACKAGE

36-LEAD PLASTIC SSOP

VID1

PLLIN

PLLFLTR

FCB

IN+

IN–

DIFFOUT

EAIN

SGND

SENSE1+

SENSE1–

SENSE2+

SENSE2–

SENSE3–

SENSE3+

RUN/SS

ITH

VID2

VID0

PGOOD

BOOST1

TG1

SW1

BOOST2

TG2

SW2

VCC

BG1

PGND

BG2

BG3

SW3

TG3

BOOST3

VID4

VID3

TJMAX = 125°C, θJA = 95°C/W

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

ORDER PART

NUMBER

LTC3732CUHF

13 14 15 16

TOP VIEW

UHF PACKAGE

38-LEAD (7mm

× 5mm) PLASTIC QFN

PADDLE IS SGND

(MUST BE CONNECTED TO PCB AND SGND PIN)

17 18 19

38 37 36 35 34 33 32

IN+

IN–

DIFFOUT

EAIN

PADDLE

SGND

SENSE1+

SENSE1–

SENSE2+

SENSE2–

SENSE3–

SENSE3+

TG1

SW1

BOOST2

TG2

SW2

VCC

DRVCC

BG1

PGND

BG2

BG3

SW3

UNDERSIDE

PADDLE

IS SGND

TJMAX = 125°C, θJA = 34°C/W

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