LT3991

2

3991f

ABSOLUTE MAXIMUM RATINGS

BOOST Pin Voltage ...................................................75V

BOOST Pin Above SW Pin.........................................30V

FB, RT, SYNC, SS Voltage ...........................................6V

PG, BD Voltage .........................................................30V

Boost Diode Current....................................................1A

(Note 1)

TOP VIEW

DD PACKAGE

10-LEAD (3mm

3mm) PLASTIC DFN

10

11

GND

9

6

7

8

4

5

3

2

1

SYNC

PG

RT

SS

FB

BD

BOOST

SW

EN

EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB

1

2

3

4

5

BD

BOOST

SW

EN

10

9

8

7

6

11

GND

SYNC

PG

RT

SS

FB

TOP VIEW

MSE PACKAGE

10-LEAD PLASTIC MSOP

EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB

PIN CONFIGURATION

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3991EDD#PBF

LT3991EDD#TRPBF

LFJR

10-Lead (3mm

× 3mm) Plastic DFN

–40°C to 125°C

LT3991IDD#PBF

LT3991IDD#TRPBF

LFJR

10-Lead (3mm

× 3mm) Plastic DFN

–40°C to 125°C

LT3991EMSE#PBF

LT3991EMSE#TRPBF

LTFJS

10-Lead Plastic MSOP

–40°C to 125°C

LT3991IMSE#PBF

LT3991IMSE#TRPBF

LTFJS

10-Lead Plastic MSOP

–40°C to 125°C

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

Consult LTC Marketing for information on non-standard lead based finish parts.

Operating Junction Temperature Range (Note 2)

LT3991E............................................. –40°C to 125°C

LT3991I.............................................. –40°C to 125°C

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

Lead Temperature (Soldering, 10 sec)

(MSE Only) ....................................................... 300°C