12

LTC1504

©LINEAR TECHNOLOGY CORPORATION 1997

Linear Technology Corporation

tance in series with the external inductor, slightly raising

its value. The SW trace need only be wide enough to

support the maximum peak current under short circuit

conditions—perhaps 1A. If a trace needs to be compro-

mised to make the layout work, this is the one. Note that

long traces at the SW node may aggravate EMI consider-

ations—don’t get carried away. If a Schottky diode is used

at the SW node, it should be located at the LTC1504 end

of the trace, close to the device pins.

The LTC Applications Department has constructed liter-

ally hundreds of layouts for the LTC1504 and related

parts, many of which worked and some of which are now

archived in the Bad Layout Hall of Fame. If you need layout

assistance or you think you have a candidate layout for the

Hall of Fame, give Applications a call at (408) 954-8400.

Demo boards with properly designed layouts are available

and specialized layouts can be designed if required. The

applications team is also experienced in external compo-

nent selection for a wide variety of applications, and they

have a never-ending selection of tall tales to tell as well.

When in doubt, give them a call.

1504i LT/TP 0897 4K • PRINTED IN USA

High Efficiency 5V to 2.5V Converter with Current Limit

SCSI-2 Active Terminator

SHDN

SS

COMP

GND

SW

FB

+

1

µF

0.1

µF

5V

SHDN

7.5k

0.01

µF

220pF

11.8k

12.1k

MBRS0530L

+

2.5V

1504 • TA03

LTC1504

SS

COMP

GND

SW

FB

4.7

µF

CERAMIC

TERMPWR

7.5k

0.01

µF

220pF

15k

12k

+

1504 • TA04

NC

NC

LTC1504

110

Ω

110

Ω

110

Ω

110

Ω

110

Ω

18

TO

27

LINES

•

•

•

PART NUMBER

DESCRIPTION

COMMENTS

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LT

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LT1372

1.5A, 500kHz Step-Up Switching Regulator

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1.5A, 500kHz Step-Down Switching Regulator

Nonsynchronous, 1.5A Max Current

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Nonsynchronous, Better Low Load Efficiency

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1.5A, 500kHz Monolithic Buck Regulator

Nonsynchronous, 1.5A Max Current

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