LTC1421ISW#PBF Datasheet LTC1421CG#PBF, LTC1421IG#PBF, LTC1421CSW#PBF | P22-P24

22

LTC1421/LTC1421-2.5

APPLICATIONS INFORMATION

WUU

U

10

9

13

14

8

11

15

6

2

24

4

3

1

R1

0.005Ω

1W

Q1

MTB50N06E

S1

LTC1421

IRF530

16

C1

1µF

171819202122

5712

23

STAGGERED CONNECTOR

2

1

5

6

3

C7

100µF

16V

5V

8A

12V

0.42A

–12V

0.42A

+

1421 F24

ASTRODYNE

ASD10-48D12

CONTROL

+IN +OUT

–IN –OUT

C2

1µF

C5

220µF

100V

R3

340Ω

1/8W

R4

10k

1/8W

R5

4.3k

1/8W

R6

15k

1/8W

C3

0.47µF

R7

1k

1/8W

C

LOAD

+

C6

100µF

16V

+

PC BOARDBACKPLANE

5V

–48V

Q3

2N5401

1µF

+

43

21

10k

Figure 24. 5V and –48V to ±12V Hot Swappable Supply

10

7

8

14

13

15

1

24

3

2

12

LTC1421

16

Q3

VN2222

C2

0.1µF

C1

1µF

17181920212223

STAGGERED CONNECTOR

C

LOAD

+

100Ω

1k

12Ω

R1

0.005Ω

1/2W

Q1

MTB50N06E

Q2

VN2222

S1

1421 F25

PC BOARDBACKPLANE

5V

R4

10k

R3

47.5k

5V

8A

1µF

RESET

GND

µP

V

CC

43

21

10k

Figure 25. Hot Swappable 5V Supply with Overvoltage Protection

23

LTC1421/LTC1421-2.5

APPLICATIONS INFORMATION

WUU

U

G Package

24-Lead Plastic SSOP (0.209)

(LTC DWG # 05-08-1640)

Dimensions in inches (millimeters) unless otherwise noted.

PACKAGE DESCRIPTION

U

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

0.037 – 0.045

(0.940 – 1.143)

0.004 – 0.012

(0.102 – 0.305)

0.093 – 0.104

(2.362 – 2.642)

0.050

(1.270)

BSC

0.014 – 0.019

(0.356 – 0.482)

TYP

0

° – 8° TYP

NOTE 1

0.009 – 0.013

(0.229 – 0.330)

0.016 – 0.050

(0.406 – 1.270)

0.291 – 0.299**

(7.391 – 7.595)

× 45°

0.010 – 0.029

(0.254 – 0.737)

NOTE:

1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

*

**

S24 (WIDE) 1098

NOTE 1

0.598 – 0.614*

(15.190 – 15.600)

22 21 20 19 18

17

16 15

1

23

4

5

6

78

0.394 – 0.419

(10.007 – 10.643)

910

1314

11 12

2324

G24 SSOP 1098

0.13 – 0.22

(0.005 – 0.009)

0

° – 8°

0.55 – 0.95

(0.022 – 0.037)

5.20 – 5.38**

(0.205 – 0.212)

7.65 – 7.90

(0.301 – 0.311)

1234

5

6

7

8 9 10 11 12

8.07 – 8.33*

(0.318 – 0.328)

2122 18 17 16 15 14

13

19202324

1.73 – 1.99

(0.068 – 0.078)

0.05 – 0.21

(0.002 – 0.008)

0.65

(0.0256)

BSC

0.25 – 0.38

(0.010 – 0.015)

NOTE: DIMENSIONS ARE IN MILLIMETERS

DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.152mm (0.006") PER SIDE

DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.254mm (0.010") PER SIDE

*

**

SW Package

24-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

Figure 26. Power-Up and Power-Down Sequence Controller

10

11

6

7

8

14

13

15

9

1

24

4

5

3

2

12

LTC1421

16

C2

0.1µF

24V

C1

1µF

16V

0.047µF

17181920212223

STAGGERED CONNECTOR

+

C5

0.1µF

25V

1k

R1

0.005Ω

1W

R3

1M

5%,1/8W

Q1

MTB50N06E

Q2

MTB50N06E

S1

1421 F26

PC BOARDBACKPLANE

5V

3.3V

R6

200k

1%

1/16W

R5

330k

1%

1/16W

3.3V

8A

5V

8A

R2

0.005Ω

1W

C

LOAD

C

LOAD

+

RESET

GND

µP

V

CC

R4

1k

5%

1/16W

1µF

43

21

43

21

10k

24

LTC1421/LTC1421-2.5

 LINEAR TECHNOLOGY CORPORATION 1996

1421fc LT/LCG 0301 2K REV C • PRINTED IN USA

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900

●

FAX: (408) 434-0507

●

www.linear-tech.com

TYPICAL APPLICATION

U

10

11

6

7

8

14

13

15

9

1

24

4

5

3

2

12

LTC1421

Q3

1/2 IRF7101

Q2

1/2 IRF7101

PCI

CONNECTOR

Q1

IRF7413

1617

R11

10Ω

C2

0.22µF

25V

R4

30Ω

181920212223

Q4

IRF7413

12V

3.3A CIRCUIT BREAKER

3.3V

11.5A CIRCUIT BREAKER

5V

10A CIRCUIT BREAKER

R10

100k

R13

5.1k

R5

20k

R12

10Ω

C1

1µF

16V

R1

0.005Ω

5%

1/2W

R14

5.1k

R2

0.015Ω

5%

1W

R8

5.62k

1%

1/16W

R3

0.005Ω

5%

1W

POWER GOOD

RST #

SELECT BITS

BUS ENABLE

FAULT

12V

500mA

3.3V

7.5A

5V

5A

ON/OFF

DATA BUS

–12V

100mA

PCI POWER

CONTROLLER

QuickSwitch

R7

130k

R9

10Ω

Q5

TP0610T

C3

1µF

25V

R6

100Ω

1%

1/16W

–12V

NO CIRCUIT BREAKER

GND

1421 F27

ALL RESISTORS 5%, 1/16W EXCEPT WHERE NOTED

RST #

LOGIC

PCI PERIPHERALMOTHERBOARD OR BACKPLANE

1µF

4

3

21

4

3

21

4

3

21

10k

Figure 27. PCI Power Controller

RELATED PARTS

PART NUMBER DESCRIPTION COMMENTS

LTC1155 Dual High Side Switch Driver Short-Circuit Protection and Micropower Standby Operation

LTC1422 Hot Swap Controller in SO-8 System Reset Output with Programmable Delay

LTC1477/LTC1478 Single and Dual Protected High Side Switches Inrush Current Limited, Built-In 2A Short-Circuit Protection

LT1640L/LT1640H Negative Voltage Hot Swap Controller in SO-8 Operates from –10V to –80V

LT1641 High Voltage Hot Swap Controller in SO-8 Operates from 9V to 80V

LTC1642 Fault Protected Hot Swap Controller Operates Up to 16.5V, Protected to 33V

LTC1643L/LTC1643H PCI-Bus Hot Swap Controller 3.3V, 5V and ±12V in Narrow 16-Pin SSOP

LTC1645 2-Channel Hot Swap Controller Operates from 1.2V to 12V, Power Sequencing

LTC1647 Dual Hot Swap Controller Dual ON Pins for Supplies from 3V to 15V

LTC1421ISW#PBF

LTC1421ISW#PBF

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