LTC1921

12

1921f

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

©LINEAR TECHNOLOGY CORPORATION 2002

LT/TP 0902 2K • PRINTED IN USA

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LT4250

–48V Hot Swap Controller in SO-8 Package

Active Current Limiting, Supplies from –20V to –80V

LTC4251

–48V Hot Swap Controller in SOT-23 Package

Fast Active Current Limiting, Supplies from –15V (Floating)

LTC4252

–48V Hot Swap Controller in MSOP Package

Fast Active Current Limiting, Floating Supply, PWRGD Output

LTC4253

–48V Hot Swap Controller with Sequencer

Similar to LTC4252, Sequences Three DC/DC Converters

Voltage and Fuse Monitor with LED Outputs

Single 48V Supply Monitor

Single –48V Supply Monitor

TYPICAL APPLICATIO S

MOC207

1921 TA04

LOGIC

COMMON

SUPPLY GOOD

47k

OUT F

3

4

5

7

47k

1/4W

2

8

1

6

FUSE A

RTN

LTC1921

FUSE B

OUT A

OUT B

MOC207

1921 TA06

LOGIC

COMMON

SUPPLY GOOD

47k

OUT F

3

4

5

7

47k

1/4W

2

8

1

6

FUSE A

RTN

LTC1921

FUSE B

OUT A

OUT B

1921 TA03

R3

5.1k

2W

D5

GREEN

D4

GREEN

D3

GREEN

OUT F

–48V RETURN

3

4

5

7

2

8

1

6

–48V OUT

FUSE A

RTN

LTC1921

FUSE B

OUT A

OUT B

D1

F1

SUPPLY A

–48V

SUPPLY B

–48V

F2

D2

R2

100k

R1

100k