LTC1421ISW#PBF Datasheet LTC1421CG#PBF, LTC1421IG#PBF, LTC1421CSW#PBF | P19-P21

19

LTC1421/LTC1421-2.5

APPLICATIONS INFORMATION

WUU

U

10

9

13

14

8

11

15

6

7

2

24

4

3

1

LTC1421

16

R4

300Ω

1/8W

R3

56k

1/2W

Q2

MPSA06

Q1

IRFR9110

C1

1µF

–48V

171819202122

5

S1

12

23

STAGGERED CONNECTOR

C2

2.2µF

25V

R1

5.1k

1W

D1

5.1V

+

C3

2.2µF

25V

C5

4.7µF

50V

C9

0.33µF

50V

+

C4

4.7µF

50V

3

5

1

4

+

C6

100µF

100V

L1

100µH

D4

MBR3100

Q3

2N5401

Q4

2N5401

D3

MBR3100

D2

7.5V

+

1421 F20

PC BOARDBACKPLANE

–48V

R5

10k

1/2W

R6

402Ω

1/8W

R9

1k

1/8W

R8

1k

1/8W

R2

15k

1/8W

LT1170HVCT

V

CC

V

C

SW

GND FB

R10

4.32k

1/8W

R11

4.32k

1/8W

R13

1.24k

1/8W

R14

4.64k

1/8W

R12

10k

1/8W

V

CC

5V

3A

RESET

C7

1000µF

25V

+ +

C8

1000µF

25V

1µF

Figure 20. –48V to 5V Hot Swappable Supply Using the LT1170HVCT

20

LTC1421/LTC1421-2.5

APPLICATIONS INFORMATION

WUU

U

Figure 21. –48V to 5V Hot Swappable Supply

Figure 22. 24V to 5V Hot Swappable Supply Using the LT1074CT

10

9

13

14

8

11

15

6

7

2

24

4

3

1

LTC1421

16

R4

300Ω

1/8W

R3

56k

1/8W

Q2

MPSA06

Q1

IRFR9110

C1

1µF

171819202122

512

23

STAGGERED CONNECTOR

C2

2.2µF

25V

R1

5.1k

1/4W

D1

5.1V

S1

+

C3

2.2µF

25V

+

C4

200µF

50V

D4

MBR745

L1

50µH

2

5

1

3

4

+

C5

500µF

25V

5V

5A

C6

0.01µF

1421 F22

PC BOARDBACKPLANE

24V

POR

FAULT

R5

10k

1/2W

R9

2.7k

R6

620Ω

1/8W

R2

15k

1/8W

R7

2.8k

1%

R8

2.21k

1%

LT1074CT

GND

V

IN

V

SW

V

C

FB

1µF

LTC1421

17

8

14

13

15

18

11

1

24

12

3

2

192223

STAGGERED CONNECTOR

4N25

5V

10A

1421 F21

VICOR

VI-J30-CY

GATE IN

R1

5.1k

D1

4.3V

0.1µF

R3

10k

R2

300Ω

100Ω

Q1

1N4148

4.7k

PC BOARDBACKPLANE

–48V

C1

0.1µF

100µF 100µF

++

––

1µF

21

LTC1421/LTC1421-2.5

APPLICATIONS INFORMATION

WUU

U

10

11

6

7

8

14

13

15

9

LTC1421

1617181920212223

1

24

4

5

3

2

12

STAGGERED CONNECTOR

S1

3

5

8

64

1

72

C1

1µF

16V

C3

220µF

16V

×4

C4

0.1µF

16V

C5

10µF

16V

D1

1N4148

Q2

MTD20N03HL

Q3

MTD20N03HL

Q4

MTD20N03HL

S2

S1: HARD POWER/CIRCUIT BREAKER RESET

S2: SOFT RESET

LTC1430 POWER-UP THRESHOLD: 4.8V ON 4.25V OFF

1421 F23

PC BOARDBACKPLANE

5V

C2

0.1µF

16V

LTC1430CS8

V

CC

PV

CC1

COMP

FB

SHDN G1

GND G2

R5

510Ω

5%

R8

100k

1%

R1

0.003Ω

3W, 5%

Q1

MTD20N03HL

C8

220pF

CERAMIC

C7

4700pF

CERAMIC

C6

0.1µF

16V

C10

1µF

16V

R9

26.7k

1%

R10

10k

5%

R6

22Ω

5%

R7

7.5k

5%

R4

10k

1%

+

C9

330µF

10V

×6

+

2.7µH

15A

RESET

3.3V

10A

I

MAX

= 15A

GND

µP

V

CC

1µF

43

21

10k

Figure 23. 5V to 3.3V Hot Swappable Supply Using the LTC1430CS8

LTC1421ISW#PBF

LTC1421ISW#PBF

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