Texas Instruments LMZ14201 SIMPLE SWITCHER Manual

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LMZ14201 1A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage
FEATURES
1
• Integrated Shielded Inductor
2
• 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 = 20°C/W, θ
JA
RoHS Compliant
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Check for Samples:
= 1.9°C/W
JC
SNVS649E – JANUARY 2010 – REVISED MARCH 2013
LMZ14201
DESCRIPTION
The LMZ14201 SIMPLE SWITCHER power module
is an easy-to-use step-down DC-DC solution capable
of driving up to 1A load with exceptional power
conversion efficiency, line and load regulation, and
output accuracy. The LMZ14201 is available in an
innovative package
performance and allows for hand or machine
soldering.
The LMZ14201 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
LMZ14201 only requires three external resistors and
four external capacitors to complete the power
solution. The LMZ14201 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
• 6W Maximum Total Output Power
• Up to 1A 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
• Low External Component Count
Copyright © 2010–2013, Texas Instruments Incorporated
LMZ14201
that enhances thermal