LMZ14203_13 Datasheet, PDF (1/25 Pages) Texas Instruments – LMZ14203 3A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage

LMZ14203
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SNVS632N – DECEMBER 2009 – REVISED MARCH 2013
LMZ14203 3A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage
Check for Samples: LMZ14203
KEY FEATURES
1
•2 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
• –40°C to 125°C Junction Temperature Range
• 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:
– LMZ14203/2/1 (42V Max 3A, 2A, 1A)
– LMZ12003/2/1 (20V 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)
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
DESCRIPTION
The LMZ14203 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 LMZ14203 is available in an
innovative package that enhances thermal
performance and allows for hand or machine
soldering.
The LMZ14203 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
LMZ14203 only requires three external resistors and
four external capacitors to complete the power
solution. The LMZ14203 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
• Operates at High Ambient Temperature with
no Thermal Derating
• High Efficiency Reduces System Heat
Generation
• Low Radiated Emissions (EMI) Complies with
EN55022 Class B Standard
• Passes 10V/m Radiated Immunity EMI Test
Standard EN61000 4-3
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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