LTC1504CS8-3.3 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC1504CS8-3.3 Datasheet PDF : 12 Pages
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LTC1504
APPLICATIONS INFORMATION
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.
TYPICAL APPLICATIONS
High Efficiency 5V to 2.5V Converter with Current Limit
RIMAX*
SHDN
VCC
5V +
CIN
IMAX SHDN
VCC
SW
1µF
LTC1504
GND
FB
SS COMP
LEXT
MBRS0530L
11.8k
+
VOUT
2.5V
COUT
0.1µF
7.5k
0.01µF
220pF
12.1k
CIN: AVX TPSE107M016R0125
COUT: SANYO 16CV220GX
LEXT: COILCRAFT DO3316-473
*SELECT RIMAX VALUE USING CURRENT LIMIT THRESHOLD GRAPH ON PAGE 3
1504 • TA03
TERMPWR
SCSI-2 Active Terminator
NC
IMAX SHDN
LEXT
VCC
SW
4.7µF
CERAMIC
LTC1504
GND
FB
SS COMP
15k
+
12k
110Ω
•••
110Ω
110Ω
110Ω
110Ω
COUT
18
TO
27
LINES
NC
COUT: AVX TPSC107M006R0150
LEXT: SUMIDA CD54-470
7.5k
0.01µF
220pF
1504 • TA04
RELATED PARTS
PART NUMBER
LTC1174
LT®1307
LT1372
LT1376
LTC1433/LTC1434
LT1507
DESCRIPTION
600mA, High Efficiency Step-Down Converter
Single Cell 600kHz DC/DC Converter
1.5A, 500kHz Step-Up Switching Regulator
1.5A, 500kHz Step-Down Switching Regulator
450mA, Low Noise Current Mode Step-Down Converters
1.5A, 500kHz Monolithic Buck Regulator
COMMENTS
Nonsynchronous, Better Low Load Efficiency
Boost Mode, Micropower
Boost Mode, High Power
Nonsynchronous, 1.5A Max Current
Nonsynchronous, Better Low Load Efficiency
Nonsynchronous, 1.5A Max Current
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417q (408) 432-1900
FAX: (408) 434-0507q TELEX: 499-3977 q www.linear-tech.com
1504i LT/TP 0897 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1997
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