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LMR54410

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SIMPLE SWITCHER® power converter 4.5-V to 36-V, 1-A, synchronous buck with 80-µA IQ

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Data sheet

LMR54410

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4 Vin (max) (V) 36 Vout (min) (V) 0.8 Vout (max) (V) 28 Iout (max) (A) 1 Iq (typ) (mA) 0.08 Switching frequency (min) (kHz) 1100 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
Vin (min) (V) 4 Vin (max) (V) 36 Vout (min) (V) 0.8 Vout (max) (V) 28 Iout (max) (A) 1 Iq (typ) (mA) 0.08 Switching frequency (min) (kHz) 1100 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4-V to 36-V input voltage range
    • Withstands up to 50-V short VIN transient
    • 0.6-A/1-A continuous output current
    • 60-ns minimum switching on time
    • 1.1-MHz fixed switching frequency
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Monotonic start-up with pre-biased output
    • Short circuit protection with hiccup mode
    • Precision enable
    • ±1% tolerance voltage reference
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package
  • Pin-to-pin compatible with the LMR14010A, LMR50410, and TPS560430
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4-V to 36-V input voltage range
    • Withstands up to 50-V short VIN transient
    • 0.6-A/1-A continuous output current
    • 60-ns minimum switching on time
    • 1.1-MHz fixed switching frequency
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Monotonic start-up with pre-biased output
    • Short circuit protection with hiccup mode
    • Precision enable
    • ±1% tolerance voltage reference
  • Small solution size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • SOT-23 package
  • Pin-to-pin compatible with the LMR14010A, LMR50410, and TPS560430
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options

The LMR544xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1-A and 0.6-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 LMR544xx operates at 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. It has a PFM version to realize high efficiency at light load and a 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 allow the device to be used with minimal 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 LMR544xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1-A and 0.6-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 LMR544xx operates at 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. It has a PFM version to realize high efficiency at light load and a 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 allow the device to be used with minimal 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.
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Technical documentation

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Type Title Date
* Data sheet LMR544xx SIMPLE SWITCHER® 4-V to 45-V, 0.6-A/1-A Buck Converter in a SOT-23 Package datasheet (Rev. B) PDF | HTML 15 Feb 2022
Certificate LMR54410EVM EU RoHS Declaration of Conformity (DoC) 16 Nov 2021
User guide LMR54410EVM User's Guide PDF | HTML 15 Oct 2021
Functional safety information LMR544xx Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 15 Oct 2021

Design & development

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

Evaluation board

LMR50410EVM — 4-V to 36-V, 1-A synchronous step-down converter evaluation module

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.
User guide: PDF
Not available on TI.com
Evaluation board

LMR54410EVM — LMR54410 evaluation module with 4-V to 36-V, 1-A synchronous step-down converter

The LMR54410EVM is a fully assembled and tested circuit for evaluating the LMR54410 step-down converter. The board has a jumper connector to enable pin and could provide pull up device to VIN or external high level enable. The board is set as a 3.3-V-Vout. The board also has AC signal injection (...)

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

LMR54410 PSpice Transient Model (Rev. A)

SLUM799A.ZIP (266 KB) - PSpice Model
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Simulation model

LMR54410F PSpice Transient Model (Rev. A)

SLUM801A.ZIP (267 KB) - PSpice Model
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Calculation tool

SLURB07 — LMR54410 Quick Start Tool

Supported products & hardware

Supported products & hardware

Products
Buck converters (integrated switch)
LMR54410 — SIMPLE SWITCHER® power converter 4.5-V to 36-V, 1-A, synchronous buck with 80-µA IQ
Download
PCB layout

LMR544xx PCB Layout Files

SLURB08.ZIP (2441 KB)
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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 (...)
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Reference designs

TIDA-010087 — 100-A Dual-phase digital control battery tester reference design

This reference design illustrates a method to precisely control the current and voltage of a bidirectional interleaved buck-converter power stage using a C2000™ microcontroller (MCU) and a precision ADC ADS131M08. This design achieves less than ±20-mA current regulation error, and (...)
Design guide: PDF
Package Pins Download
SOT-23 (DBV) 6 View options
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