LMZ142033A Datasheet, PDF (1/6 Pages) National Semiconductor (TI) – Demo Board SIMPLE SWITCHER® Power Module Quick Start Guide

LMZ14203 3A Demo Board
SIMPLE SWITCHER® Power
Module Quick Start Guide
National Semiconductor
Application Note 2032
Alan Martin
January 22, 2010
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
• 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
Demo Board Features
• 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
Typical Applications
• Point of load conversions from 12V and 24V input rail
• Space constrained applications
• Industrial controls
• Telecom
• Networking equipment
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