Home Power management AC/DC & DC/DC converters (integrated FET)
Home
Power management
AC/DC & DC/DC converters (integrated FET)

LMR14020

ACTIVE

SIMPLE SWITCHER, 4-V to 40-V, 2-A 2.2-MHz step-down converter with Low IQ

Order now
Data sheet

A newer version of this product is available

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
LMR51420 ACTIVE SIMPLE SWITCHER® power converter 4.5-V to 36-V, 2-A, synchronous buck with 40-µA IQ SOT-23 package, integrated compensation and synchronous rectification.
TLVM13620 ACTIVE 3.6-V to 36-V input, 1-V to 6-V output, 2-A step-down module in 4-mm x 6-mm x 1.8-mm package Smaller design with an integrated-inductor power module.

LMR14020

ACTIVE
Data sheet Order now

Product details

Iout (max) (A) 2 Vin (min) (V) 4 Vin (max) (V) 40 Topology Buck Type Converter 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, Tracking, UVLO adjustable Control mode current mode Vout (min) (V) 1 Vout (max) (V) 36 Rating Catalog Operating temperature range (°C) -40 to 125
Iout (max) (A) 2 Vin (min) (V) 4 Vin (max) (V) 40 Topology Buck Type Converter 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, Tracking, UVLO adjustable Control mode current mode Vout (min) (V) 1 Vout (max) (V) 36 Rating Catalog Operating temperature range (°C) -40 to 125
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • 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
  • 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
  • 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
  • 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 LMR14020 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. 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 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. 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.
open-in-new Find other AC/DC & DC/DC converters (integrated FET)
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 13
Type Title Date
* Data sheet LMR14020 SIMPLE SWITCHER® 40 V 2 A, 2.2 MHz Step-Down Converter with 40 µA IQ datasheet (Rev. A) PDF | HTML 08 Apr 2015
Application note Simple Solution for EMI Filter Stability Issue in DC/DC Converters (Rev. A) 25 Apr 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 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 LMR14020EVM User’s Guide 30 Jan 2015
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004

Design & development

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

Evaluation board

DS90UH981-Q1EVM — DS90UH981-Q1 DSI to FPD-Link IV bridge serializer evaluation module

The DS90Ux981-Q1EVM is an evaluation module for evaluating the DS90Ux981-Q1 MIPI DSI to FPD-Link IV serializer.  The DS90Ux981-Q1 supports ultra-high-definition resolutions including 4K with 30 bits per pixel at 60 Hz. The 2 MIPI DSI port input is compatible with MIPI DSI v1.3.1 and DPHY v1.2 (...)
Request
Evaluation board

DS90UH981-Q1MEVM — DS90UH981-Q1 DSI to FPD-Link IV bridge serializer evaluation module

The DS90Ux981-Q1MEVM is an evaluation module for evaluating the DS90Ux981-Q1 MIPI DSI to FPD-Link IV serializer.  The DS90Ux981-Q1 supports ultra-high-definition resolutions including 4K with 30 bits per pixel at 60 Hz. The 2 MIPI DSI port input is compatible with MIPI DSI v1.3.1 and DPHY (...)
Request
Evaluation board

DS90UH983-Q1EVM — DS90UH983-Q1 DisplayPort to FPD-Link IV bridge serializer evaluation module

The DS90Ux983-Q1EVM is an evaluation module for evaluating the DS90Ux983-Q1 DisplayPort to FPD-Link IV serializer. The DS90Ux983-Q1 supports ultra-high-definition resolutions including 4K with 30 bits per pixel at 60 Hz. The displayport input is compatible with displayport v1.4 with speeds up to (...)
Request
Evaluation board

DS90UH983-Q1MEVM — DS90UH983-Q1 DisplayPort to FPD-Link IV bridge serializer evaluation module

The DS90Ux983M-Q1EVM is an evaluation module for evaluating the DS90Ux983-Q1 DisplayPort to FPD-Link IV serializer.  The DS90Ux983-Q1 supports ultra-high-definition resolutions including 4K with 30 bits per pixel at 60 Hz. The displayport input is compatible with displayport v1.4 with speeds (...)
Request
Evaluation board

DS90UH984-Q1EVM — DS90UH984-Q1 FPD-Link IV to embedded displayport bridge deserializer evaluation module

The DS90Ux984-Q1EVM is an evaluation module for evaluating the DS90Ux984-Q1 FPD-Link IV to embedded displayport deserializer.  The DS90Ux984-Q1 supports ultra-high-definition resolutions including 4K with 30 bits per pixel at 60 Hz. The output DP/eDP interface is compatible with embedded (...)
Request
Evaluation board

DS90UH984-Q1MEVM — DS90UH984-Q1 FPD-Link IV to embedded displayport bridge deserializer evaluation module

The DS90Ux984-Q1MEVM is an evaluation module for evaluating the DS90Ux984-Q1 FPD-Link IV to embedded displayport deserializer.  The DS90Ux984-Q1 supports ultra-high-definition resolutions including 4K with 30 bits per pixel at 60 Hz. The output DP/eDP interface is compatible with embedded (...)
Request
Evaluation board

DS90UH988-Q1EVM — DS90UH988-Q1 FPD-Link IV to OpenLDI deserializer evaluation module

The DS90Ux988-Q1 evaluation module (EVM) is a functional board design for evaluating the DS90Ux988-Q1 FPD-Link IV to OLDI/RGB bridge device. The device partners with FPD-Link IV capable serializers such as the DS90Ux981-Q1 or DS90Ux983-Q1 serializers in FPD-Link IV mode, or FPD-Link III capable (...)
Request
Evaluation board

DS90UH988-Q1MEVM — DS90UH988-Q1 FPD-Link IV to OpenLDI deserializer evaluation module

The DS90Ux988-Q1M evaluation module (EVM) is a functional board design for evaluating the DS90Ux988-Q1 FPD-Link IV to OLDI/RGB bridge device. The device partners with FPD-Link IV capable serializers such as the DS90Ux981-Q1 or DS90Ux983-Q1 serializers in FPD-Link IV mode, or FPD-Link III capable (...)
Request
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 (...)

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

LMR14020S PSpice Average Model

SNVMB55.ZIP (30 KB) - PSpice Model
Download
Simulation model

LMR14020S PSpice Transient Model

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

LMR14020S Unencrypted PSpice Transient Model

SNVM818.ZIP (6 KB) - PSpice Model
Download
Reference designs

TIDA-01558 — 98% Efficiency Analog 24V to 36V, 500W Backup and 50W Charger Reference Design for DC UPS

This analog, bidirectional power conversion reference design has a discharge or boost stage of 500 W and charge or buck stage of 50 W. This reference  design is made for 24-V battery pack and 30-V to 38-V bus voltage for use in DC-UPS, battery backup unit (BBU), local energy storage (LES) and (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
HSOIC (DDA) 8 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos