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LMZ14203

ACTIVE

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

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TPSM63603 ACTIVE High-density, 3-V to 36-V input, 1-V to 16-V output, 3-A power module Smaller QFN packaging designed for low EMI.

LMZ14203

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Inverting Buck-Boost, Synchronous Buck Type Module Iout (max) (A) 3 Vin (min) (V) 6 Vin (max) (V) 42 Vout (min) (V) 0.8 Vout (max) (V) 6 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features EMI Tested, Enable, Tracking Control mode Constant on-time (COT) Duty cycle (max) (%) 92.5
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck, Inverting Buck-Boost, Synchronous Buck Type Module Iout (max) (A) 3 Vin (min) (V) 6 Vin (max) (V) 42 Vout (min) (V) 0.8 Vout (max) (V) 6 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1000 Features EMI Tested, Enable, Tracking Control mode Constant on-time (COT) Duty cycle (max) (%) 92.5
TO-PMOD (NDW) 7 139.9032 mm² 10.16 x 13.77
  • 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
  • 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

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.

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
* Data sheet LMZ14203 SIMPLE SWITCHER® 6-V to 42-V, 3-A Power Module in Leaded SMT-TO Package datasheet (Rev. S) PDF | HTML 20 Jul 2017
Selection guide Innovative DC/DC Power Modules Selection Guide (Rev. D) 14 Oct 2021
Application note Practical Thermal Design With DC/DC Power Modules (Rev. A) 20 Nov 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
White paper Simplify low EMI design with power modules 20 Nov 2017
White paper Benefits and trade-offs of various power-module package options 02 Aug 2017
White paper Comparing the Merits of Integrated Power Modules versus Discrete Regulators (Rev. B) 15 Sep 2016
Application note Design Summary LMZ1xxx and LMZ2xxx Power Module Family (Rev. B) 20 Jan 2016
Application note AN-2027 Inverting Application for the LMZ14203 SIMPLE SWITCHER Power Module (Rev. A) 06 May 2013
EVM User's guide AN-2024 LMZ1420x / LMZ1200x Evaluation Board (Rev. E) 24 Apr 2013
Application note AN-2026 Effect of PCB Design on Thermal Performance of SIMPLE SWITCHER Modules (Rev. A) 23 Apr 2013
Application note AN-2052 Texas Instruments SIMPLE SWITCHER Power Modules and EMI (Rev. C) 23 Apr 2013
Application note AN-2078 PCB Layout for Texas Instruments SIMPLE SWITCHER Power Modules (Rev. A) 23 Apr 2013
More literature SIMPLE SWITCHER® Power Modules for Broadcast Video 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Communications Infrastructure 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Factory Automation 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Medical 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Military 02 Apr 2012
More literature SIMPLE SWITCHER® Power Modules for Test and Measurement 02 Apr 2012
User guide LMZ14202/LMZ14203 Demo Board SIMPLE SWITCHER Power Module Quick Start Guide (Rev. B) 25 Apr 2010
Application note Power Supply Design Considerations for Modern FPGAs (Power Designer 121) 02 Feb 2010
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005

Design & development

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

Evaluation board

LMZ14203DEMO — Simple Switcher® Power Module 42Vin, 3A Demonstration Board

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 (...)

User guide: PDF
Not available on TI.com
Evaluation board

LMZ14203EVAL — Simple Switcher ® Power Module 42Vin, 3A Eval Board

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 (...)

User guide: PDF
Not available on TI.com
Simulation model

LMZ14203 Unencrypted PSpice Transient Model

SNVM768.ZIP (3 KB) - PSpice Model
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Simulation model

LMZ14203 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM161A.ZIP (193 KB) - PSpice Model
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Calculation tool

LMZ1X-LMZXEXTDESIGN-CALC — LMZ1x/EXT Thermal Resistance Estimate

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Reference designs

TIDA-01056 — 20-bit 1MSPS DAQ Reference Design Optimizing Power Supply Efficiency While Minimizing EMI

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01054 — Multi-Rail Power Reference Design for Eliminating EMI Effects in High Performance DAQ Systems

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01055 — ADC Voltage Reference Buffer Optimization Reference Design for High Performance DAQ Systems

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01057 — Reference Design Maximizing Signal Dynamic Range for True 10 Vpp Differential Input to 20 bit ADC

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01037 — 20-bit, 1-MSPS Isolator Optimized Data Acquisition Reference Design Maximizing SNR and Sample Rate

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01035 — 20-bit Isolated Data Acquisition Reference Design Optimizing Jitter for Max SNR and Sample Rate

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01050 — Optimized Analog Front End DAQ System Reference Design for 18 bit SAR Data Converters

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.
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01052 — ADC Driver Reference Design Improving Full Scale THD Using Negative Supply

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.
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00732 — 18-bit, 2-Msps Isolated Data Acquisition Reference Design to Achieve Maximum SNR and Sampling Rate

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 (...)
Design guide: PDF
Schematic: PDF
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