LT4256-3

20

42563f

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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PART NUMBER

DESCRIPTION

COMMENTS

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©LINEAR TECHNOLOGY CORPORATION 2004

LT/TP 0304 1K • PRINTED IN USA

APPLICATIO S I FOR ATIO

R5

0.020

Ω

LT4256-3

SENSE

GATE

FB

PWRGD

RETRY

UV

OV

TIMER

GND

D3

CMPZ5241BS

11V

R3

4.02k

R2

4.02k

R1

64.9k

R7

100

Ω

R9

4.02k

R6

10

Ω

R8

36.5k

PWRGD2

48V

2A

R4

51k

33nF

C3

0.01

µF

C1

10nF

OPEN

UV = 36V

OV = 73V

PWRGD = 40V

+

4256 TA03

R5

0.020

Ω

LT4256-3

SENSE

GATE

FB

PWRGD

RETRY

UV

OV

TIMER

GND

48V

GND

(SHORT PIN)

Q1

IRF540

Q2

IRF540

D1

CMPZ5241BS

11V

R3

4.02k

R2

4.02k

R1

64.9k

R7

100

Ω

R9

4.02k

R6

10

Ω

R8

36.5k

PWRGD1

48V

2A

R4

51k

C2

33nF

C3

0.01

µF

C1

10nF

OPEN

D2

SMAT70A

UV = 36V

OV = 73V

PWRGD = 40V

+

Dual 48V Supply Sequencing Application

50V/DIV

50V/DIV

50V/DIV

5ms/DIV

4256 TA04

PWRGD1

50V/DIV