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LMR14030-Q1

ACTIVE

SIMPLE SWITCHER® Automotive 40-V, 3.5-A, 2.2-MHz step-down converter with 40-uA IQ

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Data sheet

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LM63635-Q1 ACTIVE Automotive, 3.5V to 36V, 3.25A step-down voltage converter with spread spectrum Smaller footprint and improved EMI performance in HotRod™ QFN package.

LMR14030-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3.5 Vin (min) (V) 4 Vin (max) (V) 40 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Spread Spectrum, Tracking, UVLO adjustable EMI features Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 30 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3.5 Vin (min) (V) 4 Vin (max) (V) 40 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Spread Spectrum, Tracking, UVLO adjustable EMI features Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 30 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
HSOIC (DDA) 8 29.4 mm² 4.9 x 6 WSON (DPR) 10 16 mm² 4 x 4
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    - Device Temperature Grade 1: –40°C to 125°C
    Ambient Operating Temperature Range
    - Device HBM ESD Classification Level H1C
    - Device CDM ESD Classification Level C4A
  • 4 V to 40 V Input Range
  • 3.5 A Continuous Output Current
  • Ultra-low 40 µA Operating Quiescent Current
  • 90 mΩ High-Side MOSFET
  • Minimum Switch-On Time: 75 ns
  • Current Mode Control
  • Adjustable Switching Frequency from 200 kHz to
    2.5 MHz
  • Frequency Synchronization to External Clock
  • Spread Spectrum Option for Reduced EMI
  • Internal Compensation for Ease of Use
  • High Duty Cycle Operation Supported
  • Precision Enable Input
  • 1 µA Shutdown Current
  • External Soft-start
  • Thermal, Overvoltage and Short Protection
  • 8-Pin HSOIC with PowerPAD™ Package
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    - Device Temperature Grade 1: –40°C to 125°C
    Ambient Operating Temperature Range
    - Device HBM ESD Classification Level H1C
    - Device CDM ESD Classification Level C4A
  • 4 V to 40 V Input Range
  • 3.5 A Continuous Output Current
  • Ultra-low 40 µA Operating Quiescent Current
  • 90 mΩ High-Side MOSFET
  • Minimum Switch-On Time: 75 ns
  • Current Mode Control
  • Adjustable Switching Frequency from 200 kHz to
    2.5 MHz
  • Frequency Synchronization to External Clock
  • Spread Spectrum Option for Reduced EMI
  • Internal Compensation for Ease of Use
  • High Duty Cycle Operation Supported
  • Precision Enable Input
  • 1 µA Shutdown Current
  • External Soft-start
  • Thermal, Overvoltage and Short Protection
  • 8-Pin HSOIC with PowerPAD™ Package

The LMR14030-Q1 is a 40 V, 3.5 A step down regulator with an integrated high-side MOSFET. With a wide input range from 4 V to 40 V, it’s suitable for various applications from industrial to automotive for power conditioning from unregulated sources. An extended family is available in 2 A and 5 A options in pin-to-pin compatible packages, including LMR14020-Q1 and LMR14050-Q1. The regulator’s quiescent current is 40 µA in Sleep-mode, which is suitable for battery powered systems. An ultra-low 1 µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. This also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.

The LMR14030-Q1 is available in an 8-pin HSOIC or 10-pin WSON package with exposed pad for low thermal resistance.

The LMR14030-Q1 is a 40 V, 3.5 A step down regulator with an integrated high-side MOSFET. With a wide input range from 4 V to 40 V, it’s suitable for various applications from industrial to automotive for power conditioning from unregulated sources. An extended family is available in 2 A and 5 A options in pin-to-pin compatible packages, including LMR14020-Q1 and LMR14050-Q1. The regulator’s quiescent current is 40 µA in Sleep-mode, which is suitable for battery powered systems. An ultra-low 1 µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. This also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.

The LMR14030-Q1 is available in an 8-pin HSOIC or 10-pin WSON package with exposed pad for low thermal resistance.
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Technical documentation

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Type Title Date
* Data sheet LMR14030-Q1 SIMPLE SWITCHER® 40 V, 3.5 A Step-Down Converter with 40 µA IQ datasheet (Rev. A) PDF | HTML 03 Feb 2016
Application note Design Consideration on Boot Resistor in Buck Converter PDF | HTML 15 May 2023
Selection guide Automotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B) 15 Apr 2021
Application note Reduce Conducted EMI in Automotive Buck Converter Applications 31 Jul 2019
Application note How to Evaluate Junction Temperature Properly with Thermal Metrics (Rev. B) 29 Mar 2019
Technical article Which multichannel buck converter layout offers better EMI performance? PDF | HTML 23 Oct 2018
Application note How SYNC Logic Affects EMI Performance for Dual-Channel Buck Converters 27 Apr 2018
Application note Low Conducted EMI Power Solution for Automotive Digital Cockpit With LMR14050 an 07 Feb 2018
Application note Design Feedforward Capacitor for LMR14020 20 Dec 2017
Application note How to Evaluate the Maximum Inductor in Internal Compensation PCM Buck Converter 20 Sep 2017
Application note Extending Buck Regulator to Positive Buck-Boost Configuration 02 Sep 2017
EVM User's guide LMR14030QDPR EVM User's Guide 08 Feb 2016

Design & development

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

Evaluation board

LMR14030QDPREVM — LMR14030QDPR Wide Vin Step-Down Converter Evaluation Module

The LMR14030QDPREVM is a fully assembled and tested circuit for evaluating the LMR14030QDPRRQ1 Step-Down Converter. The LMR14030QDPREVM operates from 7V to 40V input (12V nominal) and provides a 5.0V or 3.3V output at 3.5A. The board has jumper connectors to enable or disable the converter (...)
User guide: PDF
Not available on TI.com
Evaluation board

LMR14030SEVM — LMR14030S Step-Down Converter Evaluation Module

The LMR14030SEVM is a fully assembled and tested circuit for evaluating the LMR14030S Step-Down Converter. The LMR14030SEVM operates from 7V to 36V input (12V nominal) and provides a 5.0V or 3.3V output at 3.5A. The board also has jumper connectors to enable or disable the converter operation, (...)

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

LMR14030S PSPICE Transient Model

SNVM707.ZIP (61 KB) - PSpice Model
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Simulation model

LMR14030S PSpice Average Model

SNVMBD5.ZIP (72 KB) - PSpice Model
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Simulation model

LMR14030S Unencrypted PSpice Transient Model

SNVM922.ZIP (6 KB) - PSpice Model
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Reference designs

TIDA-020001 — Automotive 144-Zone Local Dimming Backlight Reference Design

This local dimming backlight reference design conserves power, extends the life of liquid-crystal displays (LCDs), and enhances automotive display quality through high dynamic range (HDR) or localized dimming technology. Seven multi-channel constant-current LED drivers allow for 144-zone localized (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP11136 — Automotive Radio USB Power Port (5V@2.1A) and LED Backlight Driver Reference Design

The PMP11136 reference design supplies cable drop compensated USB outputs of 5V @ 2.1A and 5V @ 1A. Additionally, there is a buck converter output of 3.3V @ 2.5A and a 12V @ 0.163A current regulated LED boost converter.
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
HSOIC (DDA) 8 Ultra Librarian
WSON (DPR) 10 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

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