LT3791-1 datasheet(2/30 Pages) LINER

Part #	LT3791-1

Description	High Efficiency, Synchronous,4-Switch Buck-Boost Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3780

2

3780ff

For more information www.linear.com/LTC3780

absoluTe MaxiMuM raTings

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, (BOOST – SW1),

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

RUN, SS....................................................... –0.3V to 6V

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

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

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

(Note 1)

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

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

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

Operating Junction Temperature Range (Notes 2, 7)

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

LTC3780I............................................ –40°C to 125°C

LTC3780MP ....................................... –55°C to 125°C

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

Lead Temperature (Soldering, 10 sec)

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

1

2

3

4

5

6

7

8

9

10

11

12

TOP VIEW

G PACKAGE

24-LEAD PLASTIC SSOP

24

23

22

21

20

19

18

17

16

15

14

13

PGOOD

SS

SENSE+

SENSE–

ITH

VOSENSE

SGND

RUN

FCB

PLLFLTR

PLLIN

STBYMD

BOOST1

TG1

SW1

VIN

EXTVCC

INTVCC

BG1

PGND

BG2

SW2

TG2

BOOST2

TJMAX = 125°C, θJA = 130°C/W

32 31 30 29 28 27 26 25

9 10 11 12

TOP VIEW

33

UH PACKAGE

32-LEAD (5mm

× 5mm) PLASTIC QFN

13 14 15 16

17

18

19

20

21

22

23

24

8

7

6

5

4

3

2

1

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

pin conFiguraTion

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