SIMPLE SWITCHER® 4-V to 40-V, 1-A step-down converter With high efficiency eco-mode


Product details


Vin (Min) (V) 4 Vin (Max) (V) 40 Vout (Min) (V) 0.8 Vout (Max) (V) 30 Iout (Max) (A) 1 Iq (Typ) (uA) 30 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, UVLO Fixed, Soft Start Fixed Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6 open-in-new Find other Buck converters (integrated switch)


  • Input Voltage Range: 4 V to 40 V with Transient Protection to 45 V
  • 0.7-MHz Switching Frequency
  • Ultra-High Efficiency at Light Load with Eco-mode™
  • Low Dropout Operation
  • Output Current up to 1 A
  • Precision Enable Input
  • Overcurrent Protection
  • Internal Compensation
  • Internal Soft-Start
  • Small Overall Solution Size (TSOT-6L Package)
  • Create a Custom Design Using the LMR14010A With the WEBENCH® Power Designer

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The LMR14010A is a PWM DC-to-DC buck (step-down) regulator. With a wide input range from 4 V to 40 V, it is suitable for a wide range of applications from industrial to automotive. An ultra-low 1-µA shutdown current prolongs battery life. Operating frequency is fixed at 0.7 MHz, allowing the use of small external components while minimizing output ripple voltage. Soft-start and compensation circuits are implemented internally, limiting the number of external components.

The LMR14010A is optimized for up to 1-A load current. It has a 0.765-V nominal feedback voltage.

The device has built-in protection features such as pulse-by-pulse current limit, thermal sensing and shutdown due to excessive power dissipation. The LMR14010A is available in a low profile TSOT-6L package (2.9 mm × 1.6 mm × 0.85 mm).

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Technical documentation

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Type Title Date
* Datasheet LMR14010A 4-V to 40-V, 1-A Step-Down Converter With High Efficiency Eco-mode datasheet Mar. 21, 2018
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guide LMR14010AEVM Evaluation Board Guide Jan. 11, 2018

Design & development

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Hardware development

The LMR14010A is a simple, easy-to-use, 1-A Asynchronous step-down converter with fixed 700 kHz in SOT23-6 package. The LMR14010AEVM is a fully assembled and tested circuit for evaluating the LMR14010A step-Down Converter. The LMR14010AEVM operates from 6 V to 18 V input (12 V nominal) and provides (...)
  • 4 V to 40 V Input Voltage Range
  • Accurate 5-V Output
  • Up to 1-A output Current
  • Switching Frequency 700 KHz

Design tools & simulation

SLUM629.ZIP (137 KB) - PSpice Model
SLUM630.ZIP (6 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
SOT-23-THIN (DDC) 6 View options

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