LMZ14203DEMO/NOPB National Semiconductor, LMZ14203DEMO/NOPB Datasheet

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LMZ14203DEMO/NOPB

Manufacturer Part Number
LMZ14203DEMO/NOPB
Description
BOARD DEV PWR MODULE LMZ14203
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Datasheets
1.LMZ14203TZ-ADJNOPB.pdf (18 pages)
2.LMZ14203DEMONOPB.pdf (6 pages)

Specifications of LMZ14203DEMO/NOPB

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
3.3V
Current - Output
3A
Voltage - Input
6 ~ 42 V
Regulator Topology
Buck
Frequency - Switching
Up to 1MHz
Board Type
Fully Populated
Utilized Ic / Part
LMZ14203
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
Other names
LMZ14203DEMO
© 2010 National Semiconductor Corporation
LMZ14203 3A Demo Board
SIMPLE SWITCHER® Power
Module Quick Start Guide
Description
The LMZ14203 SIMPLE SWITCHER power module is a com-
plete, easy to use step-down DC-DC solution capable of
driving up to 3A load. The LMZ14203 is available in an inno-
vative, easy to use package that enhances thermal perfor-
mance and allows for hand or machine soldering.
The LMZ14203 demo board can accept an input voltage rail
between 8V and 42V and deliver an adjustable and highly
accurate output voltage as low as 0.8V. The LMZ14203 only
requires three external resistors and four external capacitors
to complete the power solution. The LMZ14203 is a reliable
and robust solution with the following protection features:
thermal shutdown, input under-voltage lockout, output over-
voltage protection, short-circuit protection, output current lim-
it, and allows startup into a pre-biased output. A single resistor
adjusts switching frequency up to 1 MHz.
Packaging Highlights
•
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7 lead module package (Similar to TO-263)
Single exposed die attach pad for enhanced thermal
performance
10.2 x 13.8 x 4.6 mm module package
High power density
1.7” x 2.3” reduced size demo board form factor
Front View
301144
30114401
National Semiconductor
Application Note 2032
Alan Martin
January 22, 2010
Demo Board Features
•
•
•
•
•
•
•
•
•
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Typical Applications
•
•
•
•
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Power input voltage range 6V-42V
UVLO programmed at 8V
Adjustable output voltage range 0.8V to 6V
Up to 3A output current
Integrated shielded inductor in module
Efficiency up to 92%
All ceramic capacitor design
No loop compensation required
Starts into pre-biased loads
Short circuit protection
Thermal Shutdown
Only 9 external passives plus module
Max 78°C ambient at full load
2 layer low cost assembly
Point of load conversions from 12V and 24V input rail
Space constrained applications
Industrial controls
Telecom
Networking equipment
Back View
www.national.com
30114402

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LMZ14203DEMO/NOPB Summary of contents

Page 1

... High power density • 1.7” x 2.3” reduced size demo board form factor Front View © 2010 National Semiconductor Corporation National Semiconductor Application Note 2032 Alan Martin January 22, 2010 Demo Board Features • ...

Page 2

Absolute Maximum Module Ratings VIN, RON to GND -0. EN, FB -0. GND Module Operating Ratings VIN 6V to 42V EN (Input on pin 6.5V module pin) Junction - 40C to ...

Page 3

Demo Board Bill of Materials Ref Des RON RENT RENB RFBT RFBB CFF CSS CIN1 CO1 CO2 U1 Alternate resistor values for alternative output voltages VOUT 6 5 3.3 2.5 1.8 1.5 1.2 0.8 Demo Board Hookup VOUT Connect the ...

Page 4

Refer to the table above when modifying the board for a different output voltage. Resistor values shown will minimize error in output voltage setting. RON Resistor: The primary function of the RON resistor is to set the On-Time ...

Page 5

Notes 5 www.national.com ...

Page 6

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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