Product details

Vin (Min) (V) 4 Vin (Max) (V) 40 Vout (Min) (V) 0.8 Vout (Max) (V) 28 Iout (Max) (A) 2 Iq (Typ) (uA) 40 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2500 Features Enable, Frequency Synchronization, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Soft Start Adjustable, Tracking, UVLO Adjustable Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1
Vin (Min) (V) 4 Vin (Max) (V) 40 Vout (Min) (V) 0.8 Vout (Max) (V) 28 Iout (Max) (A) 2 Iq (Typ) (uA) 40 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2500 Features Enable, Frequency Synchronization, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Soft Start Adjustable, Tracking, UVLO Adjustable Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1
HSOIC (DDA) 8 19 mm² 4.9 x 3.9 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
  • 2 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
  • 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
  • 2 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

The LMR14020-Q1 is a 40 V, 2 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 3.5 A and 5 A options in pin-to-pin compatible packages, including LMR14030-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 LMR14020-Q1 is available in an 8-pin HSOIC or 10-pin WSON package with exposed pad for low thermal resistance.

The LMR14020-Q1 is a 40 V, 2 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 3.5 A and 5 A options in pin-to-pin compatible packages, including LMR14030-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 LMR14020-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 LMR14020-Q1 SIMPLE SWITCHER® 40 V, 2 A Step-Down Converter with 40 µA IQ datasheet (Rev. A) 03 Feb 2016
Application note Reduce Conducted EMI in Automotive Buck Converter Applications 31 Jul 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note How to Evaluate Junction Temperature Properly with Thermal Metrics (Rev. B) 29 Mar 2019
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
User guide LMR14020QDPR EVM User 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

LMR14020QDPREVM — LMR14020QDPR Wide Vin Step-Down Converter Evaluation Module

The LMR14020QDPREVM is a fully assembled and tested circuit for evaluating the LMR14020QDPRRQ1 Step-Down Converter. The LMR14020QDPREVM operates from 7V to 40V input (12V nominal) and provides a 5.0V or 3.3V output at 2A. The board has jumper connectors to enable or disable the converter (...)
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Evaluation board

LMR14020SEVM — LMR14020S Step-Down Converter Evaluation Module

The LMR14020SEVM is a fully assembled and tested circuit for evaluating the LMR14020S Step-Down Converter. The LMR14020SEVM operates from 7V to 30V input (12V nominal) and provides a 5.0V or 3.3V output at 2A. The board also has jumper connectors to enable or disable the converter operation, change (...)

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Simulation model

LMR14020S PSpice Transient Model

SNVM706.ZIP (61 KB) - PSpice Model
Simulation model

LMR14020S Unencrypted PSpice Transient Model

SNVM818.ZIP (6 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Package Pins Download
SO PowerPAD (DDA) 8 View options
WSON (DPR) 10 View options

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