SIMPLE SWITCHER 4-V to 36-V, 1-A synchronous step-down converter


Product details


Vin (Min) (V) 4 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 1 Iq (Typ) (uA) 80 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

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


  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • Input voltage range: 4 V to 36 V
    • 1-A continuous output current
    • Minimum switching-on time: 60 ns
    • 700-kHz fixed switching frequency
    • Junction temperature range: –40°C to 150°C
    • 98% maximum duty cycle
    • Monotonic start-up with pre-biased output
    • Internal short circuit protection with hiccup mode
    • ±1% tolerance voltage reference
    • Precision enable
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23-6 package
  • Pin-to-pin compatible with LMR14010Aand TPS560430
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR50410 with the WEBENCH Power Designer

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The LMR50410 is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1-A load current. With a wide input range of 4 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR50410 operates at 700-kHz switching frequency to support use of relatively small inductors for an optimized solution size. It has an PFM version to realize high efficiency at light load and FPWM version to achieve constant frequency, and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally which allows the device to be used with minimum external components.

The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR50410 is available in SOT-23-6 package.

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Technical documentation

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Type Title Date
* Data sheet LMR50410 SIMPLE SWITCHER® 4-V to 36-V, 1-A Buck Converter in SOT-23-6 Package datasheet (Rev. A) Nov. 13, 2020
Certificate LMR50410EVM EU RoHS Declaration of Conformity (DoC) Nov. 20, 2020
User guide LMR50410EVM User Guide Nov. 12, 2020
Application note LMR50410 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA Oct. 20, 2020
Application note Understanding and Simulation of Loop Stability Test for DC/DC Converters Oct. 05, 2020
User guide LMR50410QEVM User's Guide Jul. 21, 2020
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Hardware development

document-generic User guide
The LMR50410EVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR50410 step-down converter. The board is set as a 3.3-V Vout. The board also has AC signal injection terminals for loop measurements.
  • 4-V to 36-V input voltage range
  • Accurate 3.3-V output
  • Up to 1-A output current
  • Switching frequency 700 kHz

Design tools & simulation

SLUM724.ZIP (87 KB) - PSpice Model
SLUM771.ZIP (257 KB) - PSpice Model
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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
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CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 6 View options

Ordering & quality

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