LM2734Y EVAL National Semiconductor, LM2734Y EVAL Datasheet

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LM2734Y EVAL

Manufacturer Part Number
LM2734Y EVAL
Description
BOARD EVALUATION LM2734Y
Manufacturer
National Semiconductor
Datasheets

Specifications of LM2734Y EVAL

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
1.8V
Current - Output
1A
Voltage - Input
3 ~ 20V
Regulator Topology
Buck
Frequency - Switching
550kHz
Board Type
Fully Populated
Utilized Ic / Part
LM2734
Lead Free Status / RoHS Status
Not applicable / Not applicable
Power - Output
-
© 2005 National Semiconductor Corporation
LM2734 Evaluation Board
Introduction
The LM2734 demo board is configured to convert 5V input to
1.8V output at 1A load current using the LM2734X 1.6MHz or
the LM2734Y 550kHz step down DC-DC regulator. The tiny
low profile thin SOT23 package allows the demo board to be
manufactured using less than 1 square inch of a 4-layer
printed circuit board.
The circuit is configured with the boost diode connected to
V
maximum operating limit of 5.5V + V
ration. This will ensure that the voltage between the Boost
and SW pins, V
proper operation. Please see the LM2734 datasheet for
more information regarding this requirement.
A bill of materials below describes the parts used on this
demo board. A schematic and layout have also been in-
IN
, and according to the datasheet, V
BOOST
- V
SW
, does not exceed 5.5V for
IN
fD2
must not exceed the
AN201314
using this configu-
LM2734 Demo Board Schematic
National Semiconductor
Application Note 1350
Maurice Eaglin
February 2004
cluded below along with measured performance character-
istics. The schematics at the end of this document show how
to re-configure this demo board for various input and output
conditions as discussed in the LM2734 datasheet. Short or
leave open the indicated connection as indicated in the
schematics. The above restrictions for the input voltage are
valid only for the demo board as shipped with the demo
board schematic below.
Operating Conditions
V
V
I
O
IN
O
= 1A
= 1.8V
= 5V
20131401
www.national.com

Related parts for LM2734Y EVAL

LM2734Y EVAL Summary of contents

Page 1

... Please see the LM2734 datasheet for more information regarding this requirement. A bill of materials below describes the parts used on this demo board. A schematic and layout have also been in- © 2005 National Semiconductor Corporation National Semiconductor Application Note 1350 Maurice Eaglin ...

Page 2

... Murata Murata Vishay Diodes, Inc. Vishay National Semiconductor International Rectifier TDK Vishay Vishay Manufacturer Murata Murata GRM42-6X5R106K6.3 Vishay Diodes, Inc. Vishay National Semiconductor International Rectifier TDK Vishay Vishay 2 20131402 Part Number Package Type GRM42-6X5R475K10 1206 GRM42-6X5R106K6.3 1206 VJ0805Y103KXXA 0805 1N4148W SOD-123 ...

Page 3

PCB Layout 20131403 Top Layer 3 www.national.com ...

Page 4

PCB Layout (Continued) www.national.com 20131404 Internal Plane 1 (GND) 4 ...

Page 5

PCB Layout (Continued) 20131405 Internal Plane www.national.com ...

Page 6

PCB Layout (Continued) www.national.com 20131406 Bottom Layer 6 ...

Page 7

Additional Circuit Configuration Schematics V Derived from V BOOST OUT V Derived from V BOOST SHUNT 7 20131407 20131408 www.national.com ...

Page 8

Additional Circuit Configuration Schematics www.national.com (Continued) V Derived from Series Zener Diode (V BOOST V Derived from Series Zener Diode (V BOOST 8 20131409 ) IN 20131410 ) OUT ...

Page 9

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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