LTC3780EG datasheet(2/28 Pages) LINER

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LTC3780

3780f

Input Supply Voltage (VIN)........................ –0.3V to 36V

Topside Driver Voltages

(BOOST1, BOOST2) .................................. –0.3V to 42V

Switch Voltage (SW1, SW2) ........................ –5V to 36V

INTVCC, EXTVCC, RUN, SS, (BOOST – SW1),

(BOOST2 – SW2), PGOOD .......................... –0.3V to 7V

PLLIN Voltage .......................................... –0.3V to 5.5V

PLLFLTR Voltage ...................................... –0.3V to 2.7V

FCB, STBYMD Voltages ....................... –0.3V to INTVCC

ITH, VOSENSE Voltages .............................. –0.3V to 2.4V

ABSOLUTE MAXIMUM RATINGS

Peak Output Current <10ms (TG1, TG2, BG1, BG2) .. 3A

INTVCC Peak Output Current ................................ 40mA

Operating Temperature Range (Note 7)

LTC3780E ........................................... – 40°C to 85°C

LTC3780I ............................................ – 40°C to 85°C

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

Storage Temperature Range .................. –65°C to 125°C

Lead Temperature (Soldering, 10 sec)

SSOP Only ........................................................ 300°C

(Note 1)

ORDER PART

NUMBER

LTC3780EG

LTC3780IG

TJMAX = 125°C, θJA = 130°C/W

PACKAGE/ORDER INFORMATION

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

TOP VIEW

G PACKAGE

24-LEAD PLASTIC SSOP

PGOOD

SENSE+

SENSE–

ITH

VOSENSE

SGND

RUN

FCB

PLLFLTR

PLLIN

STBYMD

BOOST1

TG1

SW1

VIN

EXTVCC

INTVCC

BG1

PGND

BG2

SW2

TG2

BOOST2

ORDER PART

NUMBER

LTC3780EUH

LTC3780IUH

32 31 30 29 28 27 26 25

10 11 12

TOP VIEW

UH PACKAGE

32-LEAD (5mm × 5mm) PLASTIC QFN

13 14 15 16

SENSE+

SENSE–

ITH

VOSENSE

SGND

RUN

FCB

PLLFTR

SW1

VIN

EXTVCC

INTVCC

BG1

PGND

BG2

SW2

TJMAX = 125°C, θJA = 34°C/W

EXPOSED PAD (PIN 33) IS SGND

(MUST BE SOLDERED TO PCB)

UH PART

MARKING

3780

3780I

The

● indicates specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise noted.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loop

VOSENSE

Feedback Reference Voltage

ITH = 1.2V (Note 3)

●

0.792

0.800

0.808

IVOSENSE

Feedback Pin Input Current

(Note 3)

–5

–50

VLOADREG

Output Voltage Load Regulation

(Note 3)

∆ITH = 1.2V to 0.7V

●

0.1

0.5

∆ITH = 1.2V to 1.8V

●

–0.1

–0.5

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