LTC1645CS View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LTC1645CS

Dual-Channel Hot Swap Controller/Power Sequencer

Linear Technology 

LTC1645

APPLICATIO S I FOR ATIO

VIN2

BOTH CURRENT LIMITS: 10A

3.3V

0.005Ω* IRF7413

VIN1

0.005Ω* IRF7413

5V

D1

1N4148

10Ω

10Ω

10k

13k

1%

0.01µF

25V

R1

47.5k

1%

14 13

12

VCC1 SENSE1 GATE1

10

ON

12

3

VCC2 SENSE2 GATE2

COMP+

8

R2

10k

1%

LTC1645

9

(14-LEAD)

COMPOUT

6

FB

FAULT

4

FAULT

*LRF1206-01-R005-J (IRC)

TIMER

GND

11

7

0.33µF

5

RESET

0.01µF

25V

28k

1%

RHYST

681k

10k

1%

10k

14.7k

1%

10k

1%

+

CLOAD2

+

CLOAD1

VOUT2

3.3V

5A

VOUT1

5V

5A

10k

µP RESET2

µP RESET

1645 F17

16

Figure 17. Ramping Up 5V Followed by 3.3V

VIN1

3.3V

VIN2

5V

R1

10k

10k

10k

Q1A

Q1B

IRF7313

22.6k

1%

D1

1/2 BAT54C 10Ω

Q2A

Q2B

IRF7313

D2

1/2

BAT54C

0.1µF

25V

10Ω

14

13

12 1

2

3

VCC1 SENSE1 GATE1 VCC2 SENSE2 GATE2

10

ON

COMP+ 8

11.3k

1%

4

FAULT

TIMER

LTC1645

(14-LEAD)

9

COMPOUT

6

FB

5

RESET

GND

11

7

0.33µF

VOUT

5V OR

3.3V

5A

R2

10k

0.1µF

25V

Q3

PN2222

1645 F18

Figure 18. Power Supply Multiplexer

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