LTC3646_15 datasheet(2/28 Pages) LINER

Part #	LTC3646

Description	40V, 1A Synchronous Step-Down Converter

Download	28 Pages

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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2 / 28 page

LTC3646/LTC3646-1

2

36461fb

For more information www.linear.com/LTC3646

ABSOLUTE MAXIMUM RATINGS

PVIN, SVIN Supply Voltage........................ –0.3V to 45V

SW Voltage (DC)........................... –0.3V to PVIN + 0.3V

BOOST – SW Voltage................................... –0.3V to 6V

VON Voltage................................................ –0.3V to 33V

MODE/SYNC, RT, ITH,

VFB Voltage ................................–0.3V to INTVCC + 0.3V

INTVCC Voltage ............................................ –0.3V to 6V

(Notes 1, 7)

1

2

3

4

5

6

7

14

13

12

11

10

9

8

SVIN

RUN

EXTVCC

INTVCC

BOOST

SW

PVIN

SGND

VFB

ITH

RT

VON

PGOOD

MODE/SYNC

TOP VIEW

15

PGND

DE PACKAGE

14-LEAD (4mm × 3mm) PLASTIC DFN

TJMAX = 150°C, θJA = 43°C/W

EXPOSED PAD (PIN 15) IS PGND, MUST BE SOLDERED TO PCB

1

2

3

4

5

6

7

8

SGND

VFB

ITH

RT

VON

PGOOD

MODE/SYNC

NC

16

15

14

13

12

11

10

9

SVIN

RUN

EXTVCC

INTVCC

BOOST

SW

PVIN

TOP VIEW

17

PGND

MSE PACKAGE

16-LEAD PLASTIC MSOP

TJMAX = 150°C, θJA = 38°C/W

EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB

PIN CONFIGURATION

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3646EDE#PBF

LTC3646EDE#TRPBF

3646

14-Lead (4mm

× 3mm) Plastic DFN

–40°C to 85°C

LTC3646IDE#PBF

LTC3646IDE#TRPBF

3646

14-Lead (4mm

× 3mm) Plastic DFN

–40°C to 125°C

LTC3646HDE#PBF

LTC3646HDE#TRPBF

3646

14-Lead (4mm

× 3mm) Plastic DFN

–40°C to 150°C

LTC3646EMSE#PBF

LTC3646EMSE#TRPBF

3646

16-Lead Plastic MSOP

–40°C to 85°C

LTC3646IMSE#PBF

LTC3646IMSE#TRPBF

3646

16-Lead Plastic MSOP

–40°C to 125°C

LTC3646HMSE#PBF

LTC3646HMSE#TRPBF

3646

16-Lead Plastic MSOP

–40°C to 150°C

LTC3646EDE-1#PBF

LTC3646EDE-1#TRPBF

36461

14-Lead (4mm

× 3mm) Plastic DFN

–40°C to 85°C

LTC3646IDE-1#PBF

LTC3646IDE-1#TRPBF

36461

14-Lead (4mm

× 3mm) Plastic DFN

–40°C to 125°C

LTC3646HDE-1#PBF

LTC3646HDE-1#TRPBF

36461

14-Lead (4mm

× 3mm) Plastic DFN

–40°C to 150°C

LTC3646EMSE-1#PBF

LTC3646EMSE-1#TRPBF 36461

16-Lead Plastic MSOP

–40°C to 85°C

LTC3646IMSE-1#PBF

LTC3646IMSE-1#TRPBF

36461

16-Lead Plastic MSOP

–40°C to 125°C

LTC3646HMSE-1#PBF

LTC3646HMSE-1#TRPBF 36461

16-Lead Plastic MSOP

–40°C to 150°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

EXTVCC Voltage ........................................... –0.3V to 6V

RUN Voltage............................................... –0.3V to 45V

PGOOD.......................................–0.3V to INTVCC + 0.3V

Operating Junction Temperature Range

(Notes 2, 7)............................................ –40°C to 150°C

Storage Temperature Range .................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec) MSE ..........300°C

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