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LMZ14203

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SIMPLE SWITCHER® 6V to 42V, 3A Power Module in Leaded Surface Mount TO Package

Data sheet
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SIMPLE SWITCHER® 6V to 42V, 3A Power Module in Leaded Surface Mount TO Package

LMZ14203

ACTIVE
Data sheet Order now

Product details

Parameters

Iout (Max) (A) 3 Vin (Min) (V) 6 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 6 Soft start Adjustable Features EMI Tested, Enable, Tracking Operating temperature range (C) -40 to 125 Iq (Typ) (mA) 1 Regulated outputs (#) 1 Switching frequency (Max) (kHz) 1000 Switching frequency (Min) (kHz) 200 Switching frequency (Typ) (kHz) 800 Duty cycle (Max) (%) 92.5 Topology Buck, Inverting Buck-Boost, Synchronous Buck open-in-new Find other Buck modules (integrated inductor)

Package | Pins | Size

TO-PMOD (NDW) 7 140 mm² 10.16 x 13.77 open-in-new Find other Buck modules (integrated inductor)

Features

  • Integrated Shielded Inductor & Simple PCB Layout
  • Flexible Start-Up 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:
    • LMZ1420x (42 V Maximum 3 A, 2 A, 1 A)
    • LMZ1200x (20 V Maximum 3 A, 2 A, 1 A)
  • Fully Enabled for WEBENCH® Power Designer
  • Electrical Specifications
    • 18-W Maximum Total Output Power
    • Up to 3-A Output Current
    • Input Voltage Range 6 V to 42 V
    • Output Voltage Range 0.8 V to 6 V
    • Efficiency up to 90%
  • Performance Benefits
    • Operates at High Ambient Temperature With No Thermal Derating
    • High Efficiency Reduces System Heat Generation
    • Low Radiated Emissions (Electromagnetic Interference [EMI]) Tested With EN55022 Class B Standard
    • Passes 10-V/m Radiated Immunity EMI Test Standard EN61000 4-3
  • Create a Custom Design Using the LMZ14203 With the WEBENCH® Power Designer

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Description

The LMZ14203 SIMPLE SWITCHER power module is an easy-to-use step-down DC-DC solution that can drive up to 3-A 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 6 V and 42 V and deliver an adjustable and highly accurate output voltage as low as 0.8 V. 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 UVLO, output overvoltage protection, short-circuit protection, output current limit, and allows start-up into a prebiased output. A single resistor adjusts the switching frequency up to 1 MHz.

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Technical documentation

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Type Title Date
* Datasheet LMZ14203 SIMPLE SWITCHER® 6-V to 42-V, 3-A Power Module in Leaded SMT-TO Package datasheet (Rev. S) Jul. 20, 2017
Application notes Practical Thermal Design With DC/DC Power Modules (Rev. A) Nov. 20, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Selection guides Innovative DC/DC Power Modules Selection Guide (Rev. C) Feb. 27, 2018
White papers Simplify low EMI design with power modules Nov. 20, 2017
White papers Benefits and trade-offs of various power-module package options Aug. 02, 2017
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
White papers Comparing the Merits of Integrated Power Modules versus Discrete Regulators (Rev. B) Sep. 15, 2016
Application notes Design Summary LMZ1xxx and LMZ2xxx Power Module Family (Rev. B) Jan. 20, 2016
Application notes AN-2027 Inverting Application for the LMZ14203 SIMPLE SWITCHER Power Module (Rev. A) May 06, 2013
User guides AN-2024 LMZ1420x / LMZ1200x Evaluation Board (Rev. E) Apr. 24, 2013
Application notes AN-2026 Effect of PCB Design on Thermal Performance of SIMPLE SWITCHER Modules (Rev. A) Apr. 23, 2013
Application notes AN-2052 Texas Instruments SIMPLE SWITCHER Power Modules and EMI (Rev. C) Apr. 23, 2013
Application notes AN-2078 PCB Layout for Texas Instruments SIMPLE SWITCHER Power Modules (Rev. A) Apr. 23, 2013
More literature SIMPLE SWITCHER® Power Modules for Broadcast Video Apr. 02, 2012
More literature SIMPLE SWITCHER® Power Modules for Communications Infrastructure Apr. 02, 2012
More literature SIMPLE SWITCHER® Power Modules for Factory Automation Apr. 02, 2012
More literature SIMPLE SWITCHER® Power Modules for Medical Apr. 02, 2012
More literature SIMPLE SWITCHER® Power Modules for Military Apr. 02, 2012
More literature SIMPLE SWITCHER® Power Modules for Test and Measurement Apr. 02, 2012
User guides LMZ14202/LMZ14203 Demo Board SIMPLE SWITCHER Power Module Quick Start Guide (Rev. B) Apr. 25, 2010
Application notes Power Supply Design Considerations for Modern FPGAs (Power Designer 121) Feb. 02, 2010
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul. 12, 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
20
Description

The SIMPLE SWITCHER power module demonstration board is optimized for peak performance and small footprint. The output voltage and fast transient response can be adjusted by replacing the small passive components. The good thermal performance of the power modules is showcased using a 2-layer 1oz (...)

Features
  • Integrated shielded inductor (inside module)
  • VIN = 6V to 42V
  • Precision enable UVLO - 8V
  • 3.3V output (output voltage is adjustable by changing 1 or 2 resistors)
  • Operates at full load up to 80°C ambient at 12V input
  • Efficiency
    • Up to 92% (LMZ14203/LMZ12003)
  • Thermal performance
    • θJA = 20°C/W
    • θJC = 1.9°C/W
  • Uses 0603 (...)
View details
EVALUATION BOARDS Download
document-generic User guide
25
Description

The SIMPLE SWITCHER power module evaluation board is optimized for peak performance and increased flexibility. By incorporating additional ceramic and an aluminum filter capacitor, the power module EVAL board demonstrates the low output ripple, fast transient response, and low conducted and radiated (...)

Features
  • Integrated shielded inductor (inside module)
  • VIN = 6V to 42V
  • Precision enable UVLO - 8V
  • 3.3V output (output voltage is adjustable by changing 1 or 2 resistors)
  • Operates at full load up to 80°C ambient at 12V input
  • Efficiency
    • Up to 92% (LMZ14203/LMZ12003)
  • Thermal performance
    • θJA = 20°C/W
    • θJC = 1.9°C/W
  • Uses 0805 (...)
View details

Design tools & simulation

SIMULATION MODELS Download
SNVM161A.ZIP (193 KB) - PSpice Model
SIMULATION MODELS Download
SNVM768.ZIP (3 KB) - PSpice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
View details
CALCULATION TOOLS Download
LMZ1x/EXT Thermal Resistance Estimate
LMZ1X-LMZXEXTDESIGN-CALC

Reference designs

REFERENCE DESIGNS Download
Multi-Rail Power Reference Design for Eliminating EMI Effects in High Performance DAQ Systems
TIDA-01054 — The TIDA-01054 reference design helps eliminate the performance degrading effects of EMI on Data Acquisition (DAQ) systems greater than 16 bits with the help of the LM53635 buck converter. The buck converter enables the designer to place power solutions close to the signal path without the unwanted (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
ADC Voltage Reference Buffer Optimization Reference Design for High Performance DAQ Systems
TIDA-01055 — The TIDA-01055 reference design for high performance DAQ Systems optimizes the ADC reference buffer to improve SNR performance and reduce power consumption with the TI OPA837 high-speed op amp. This device is used in a composite buffer configuration and provides a 22% power improvement over (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Reference Design Maximizing Signal Dynamic Range for True 10 Vpp Differential Input to 20 bit ADC
TIDA-01057 — This reference design is designed for high performance data acquisition(DAQ) systems to improve the dynamic range of 20 bit differential input ADCs. Many DAQ systems require the measurement capability at a wide FSR (Full Scale Range) in order to obtain sufficient signal dynamic range. Many earlier (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
20-bit 1MSPS DAQ Reference Design Optimizing Power Supply Efficiency While Minimizing EMI
TIDA-01056 — This reference design for high performance data acquisition (DAQ) systems optimizes power stage in order to reduce power consumption and minimize the effect of EMI from switching regulator by using LMS3635-Q1 buck converter.  This reference designs yields 7.2% efficiency improvement at most (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
20-bit, 1-MSPS Isolator Optimized Data Acquisition Reference Design Maximizing SNR and Sample Rate
TIDA-01037 — TIDA-01037 is a 20-bit, 1 MSPS isolated analog input data acquisition reference design that utilizes two different isolator devices to maximize signal chain SNR and sample rate performance. For signals requiring low jitter, such as ADC sampling clocks, TI’s ISO73xx family of low jitter devices (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
20-bit Isolated Data Acquisition Reference Design Optimizing Jitter for Max SNR and Sample Rate
TIDA-01035 — The TIDA-01035 is a 20-bit, 1 MSPS isolated analog input data acquisition reference design demonstrating how to resolve and optimize performance challenges typical of digitally isolated data acquisition systems.
  • Significantly improves high frequency AC signal chain performance (SNR  and THD) by (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Optimized Analog Front End DAQ System Reference Design for 18 bit SAR Data Converters
TIDA-01050 — The TIDA-01050 reference design aims to improve the integration, power consumption, performance, and clocking issues typically associated with automatic test equipment. This design is applicable to any ATE system but most applicable to systems requiring a large number of input channels.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
ADC Driver Reference Design Improving Full Scale THD Using Negative Supply
TIDA-01052 — The TIDA-01052 reference design aims to highlight system performance increases seen using a negative voltage rail on the analog front end driver amplifiers rather than ground. This concept is relative to all analog front ends, however this design is aimed specifically at automatic test equipment.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
18-bit, 2-Msps Isolated Data Acquisition Reference Design to Achieve Maximum SNR and Sampling Rate
TIDA-00732 — This “18-bit, 2-Msps Isolated Data Acquisition Reference Design to achieve maximum SNR and sampling rate”  illustrates how to overcome performance-limiting challenges typical of isolated data acquisition system design:
  • Maximizing sampling rate by minimizing propagation delay introduced by digital (...)
document-generic Schematic document-generic User guide

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