Product details

Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 1 Vout (Max) (V) 18 Iout (Max) (A) 2 Iq (Typ) (uA) 2400 Switching frequency (Min) (kHz) 1000 Switching frequency (Max) (kHz) 2300 Features Enable, Frequency Synchronization Rating Catalog Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 90
Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 1 Vout (Max) (V) 18 Iout (Max) (A) 2 Iq (Typ) (uA) 2400 Switching frequency (Min) (kHz) 1000 Switching frequency (Max) (kHz) 2300 Features Enable, Frequency Synchronization Rating Catalog Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 90
WSON (DSC) 10 9 mm² 3 x 3
  • Input Voltage Range of 3 V to 20 V
  • Output Voltage Range of 1 V to 18 V
  • LMR12015 and LMR12020 Deliver 1.5-A and 2-A Maximum Output Current, Respectively
  • 2-MHz Switching Frequency
  • Frequency Synchronization from 1 MHz to 2.35 MHz
  • 70-nA Shutdown Current
  • 1% Voltage-Reference Accuracy
  • Peak-Current-Mode PWM Operation
  • Thermal Shutdown
  • Internally Compensated
  • Internal Soft Start
  • Tight Accuracy for Powering Digital ICs
  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost
  • Space-Saving WSON (3 × 3 × 0.8 mm) Packaging
  • Create a custom design using the LMR12015 WEBENCH® Power Designer or LMR12020 WEBENCH® Power Designer
  • Input Voltage Range of 3 V to 20 V
  • Output Voltage Range of 1 V to 18 V
  • LMR12015 and LMR12020 Deliver 1.5-A and 2-A Maximum Output Current, Respectively
  • 2-MHz Switching Frequency
  • Frequency Synchronization from 1 MHz to 2.35 MHz
  • 70-nA Shutdown Current
  • 1% Voltage-Reference Accuracy
  • Peak-Current-Mode PWM Operation
  • Thermal Shutdown
  • Internally Compensated
  • Internal Soft Start
  • Tight Accuracy for Powering Digital ICs
  • Extremely Easy to Use
  • Tiny Overall Solution Reduces System Cost
  • Space-Saving WSON (3 × 3 × 0.8 mm) Packaging
  • Create a custom design using the LMR12015 WEBENCH® Power Designer or LMR12020 WEBENCH® Power Designer

The LMR120xx regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 10-pin WSON package. It contains all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components the LMR12015/20 is easy to use. The ability to drive 1.5-A or 2-A loads, with an internal 150-mΩ NMOS switch results in the best power density available. The control circuitry allows for on-times as low as 65 ns, thus supporting exceptionally high frequency conversion. Switching frequency is internally set to 2 MHz and synchronizable from 1 to 2.35 MHz, which allows the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 90% are easy to achieve. External shutdown is included featuring an ultra-low shutdown current of 70 nA. The LMR12015/20 utilizes peak current mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.

The LMR120xx regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 10-pin WSON package. It contains all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components the LMR12015/20 is easy to use. The ability to drive 1.5-A or 2-A loads, with an internal 150-mΩ NMOS switch results in the best power density available. The control circuitry allows for on-times as low as 65 ns, thus supporting exceptionally high frequency conversion. Switching frequency is internally set to 2 MHz and synchronizable from 1 to 2.35 MHz, which allows the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 90% are easy to achieve. External shutdown is included featuring an ultra-low shutdown current of 70 nA. The LMR12015/20 utilizes peak current mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.

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Technical documentation

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Type Title Date
* Data sheet LMR120xx 20-VIN, 1.5-A or 2-A Step-Down Voltage Regulator in WSON Package datasheet (Rev. B) PDF | HTML 14 Jun 2019
User guide LMR12020 Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 09 Dec 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Technical article Quantifying the value of wide VIN 15 Jun 2016
Technical article DC/DC converter datasheets – System losses demystified 25 Apr 2016
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) PDF | HTML 19 Apr 2016
Technical article DC/DC converter datasheets – System efficiency demystified 18 Apr 2016
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 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
Application note Input and Output Capacitor Selection 19 Sep 2005
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

LMR12020XSDEVM — LMR12020 Evaluation Module

The LMR12020 evaluation module is designed to provide the power supply design engineer with a fully functional regulatordesign which can be synchronized to an external clock between 1000 kHz and 2350 kHz. The evaluation module provides twooutput voltage options viz. 3.3V and 5V with a 2A current (...)
User guide: PDF | HTML
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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 (...)
Reference designs

PMP7877 — Power Reference Design for Xilinx® Zynq®-7000

The PMP7877 reference design provides all the rails necessary to power a Xilinx® Zynq®-7000 series SoC.  It operates from an input voltage range of 10.8Vin to 13.2Vin and has seven regulated outputs: 1Vout @ 5A, 1.8Vout @ 2.5A, 1.5Vout @ 6A, 3.3Vout @ 5A, 3.3Vout @ 5A, 5Vout @ 2A, and (...)
Schematic: PDF
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