LT3579IUFD-1-PBF Просмотр технического описания (PDF) - Linear Technology

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LT3579IUFD-1-PBF

6A Boost/Inverting DC/DC Converter with Fault Protection

Linear Technology 

LT3579/LT3579-1

TYPICAL APPLICATION

1MHz SEPIC Converter Generates a 12V Output from

a 9V to 16V Input

VPWR

9V TO 16V

VIN

3.3V TO VPWR

L1

• 6.8μH

C1

4.7μF

D1

CPWR

4.7μF

SW1 SW2

VIN

FB

L2

6.8μH

•

SHDN

GATE

100k

LT3579

FAULT CLKOUT

CVIN

4.7μF

RT

VC

SYNC GND SS

47pF

86.6k

0.22μF

130k

VOUT

12V

1.9A*

COUT

10μF

s3

9.53k

2.2nF

3579 TA29

CPWR: 4.7μF, 25V, X7R, 1206

CVIN: 4.7μF, 25V, X7R, 1206

C1: 4.7μF, 25V, X7R, 1206

*MAX OUTPUT CURRENT

VPWR = 9V

COUT: 10μF, 25V, X7R, 1210

VIN = 3.3V TO 5V 1.6A

D1: DIODES INC MBRM360

L1, L2: COOPER BUSSMANN DRQ125-6R8-R VIN = VPWR

1.4A

VPWR = 12V

1.9A

1.4A

LINE REGULATION (VIN = 5V, IOUT = 1A) = 0.017%/V

LOAD REGULATION (VPWR = 12V, VIN = 5V) = –0.23%/A

Efficiency and Power Loss

100

3.2

90

2.8

80

2.4

70

2

60

1.6

VPWR = 12V

50

VIN = 5V

1.2

40

0.8

30

0.4

20

0

0 0.25 0.5 0.75 1 1.25 1.5 1.75 2

LOAD CURRENT (A)

3579 TA08

RELATED PARTS

PART NUMBER

LT3581

LT3580

LT3479

DESCRIPTION

3.3A (ISW), 42V, 2.5MHz, High Efficiency

Step-Up DC/DC Converter

2A (ISW), 42V, 2.5MHz, High Efficiency Step-Up

DC/DC Converter

3A (ISW), 40V, 3.5MHz, High Efficiency Step-Up

DC/DC Converter

COMMENTS

VIN: 2.5V to 22V, VOUT(MAX) = 42V, IQ = 1.9mA, ISD = < 1μA, 4mm × 3mm DFN-14,

MSOP-16E

VIN: 2.5V to 32V, VOUT(MAX) = 42V, IQ = 1mA, ISD = < 1μA, 3mm × 3mm DFN-8,

MSOP-8E

VIN: 2.5V to 24V, VOUT(MAX) = 40V, IQ = 5mA, ISD = < 1μA, 4mm × 3mm DFN-14,

TSSOP-16E

40 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

35791f

LT 0410 • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 2010

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