LMZ14203EXT Datasheet, PDF (1/25 Pages) Texas Instruments – LMZ14203EXT 3A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage for Military and Rugged Applications

LMZ14203EXT
www.ti.com
SNVS666E – JUNE 2010 – REVISED APRIL 2013
LMZ14203EXT 3A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage
for Military and Rugged Applications
Check for Samples: LMZ14203EXT
FEATURES
1
•2 – 55°C to 125°C Junction Temperature Range
• Integrated Shielded Inductor
• Simple PCB Layout
• Flexible Startup Sequencing Using External
Soft-Start and Precision Enable
• Protection Against Inrush Currents and Faults
such as Input UVLO and Output Short Circuit
• Single Exposed Pad and Standard Pinout for
Easy Mounting and Manufacturing
• Fast Transient Response for Powering FPGAs
and ASICs
• Low output Voltage Ripple
• Pin-to-pin Compatible Family:
– LMZ14203EXT/2EXT/1EXT
(42V Max 3A, 2A, 1A)
– LMZ12003/2/1 (20V Max 3A, 2A, 1A)
– LMZ14203/2/1 (42V Max 3A, 2A, 1A)
• Fully Enabled for Webench® Power Designer
APPLICATIONS
• Point of Load Conversions from 12V and 24V
Input Rail
• Time Critical Projects
• Space Constrained / High Thermal
Requirement Applications
• Negative Output Voltage Applications (See AN-
2027 SNVA425)
DESCRIPTION
The LMZ14203EXT SIMPLE SWITCHER power
module is an easy-to-use step-down DC-DC solution
capable of driving up to 3A load with exceptional
power conversion efficiency, line and load regulation,
and output accuracy. The LMZ14203EXT is available
in an innovative package that enhances thermal
performance and allows for hand or machine
soldering.
The LMZ14203EXT can accept an input voltage rail
between 6V and 42V and deliver an adjustable and
highly accurate output voltage as low as 0.8V. The
LMZ14203EXT only requires three external resistors
and four external capacitors to complete the power
solution. The LMZ14203EXT is a reliable and robust
design with the following protection features: thermal
shutdown, input under-voltage lockout, output over-
voltage protection, short-circuit protection, output
current limit, and allows startup into a pre-biased
output. A single resistor adjusts the switching
frequency up to 1 MHz.
ELECTRICAL SPECIFICATIONS
• 18W Maximum Total Output Power
• Up to 3A Output Current
• Input Voltage Range 6V to 42V
• Output Voltage Range 0.8V to 6V
• Efficiency up to 90%
PERFORMANCE BENEFITS
• Low Radiated Emissions / High Radiated
Immunity
• Passes vibration Standard MIL-STD-883
Method 2007.2 Condition A JESD22–B103B
Condition 1
• Passes Drop Standard MIL-STD-883 Method
2002.3 Condition B JESD22–B110 Condition B
Figure 1. Easy To Use 7 Pin Package
PFM 7 Pin Package
10.16 x 13.77 x 4.57 mm (0.4 x 0.542 x 0.18 in)
θ_JA = 20°C/W, θ_JC = 1.9°C/W
RoHS Compliant
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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