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LMR50410-Q1

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

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Data sheet

LMR50410-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4 Vin (max) (V) 36 Switching frequency (min) (kHz) 2100 Switching frequency (max) (kHz) 2100 Features Enable, Fixed Output, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification Control mode current mode Vout (min) (V) 1 Vout (max) (V) 28 Iq (typ) (µA) 80 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4 Vin (max) (V) 36 Switching frequency (min) (kHz) 2100 Switching frequency (max) (kHz) 2100 Features Enable, Fixed Output, Forced PWM, Light Load Efficiency, Over Current Protection, Synchronous Rectification Control mode current mode Vout (min) (V) 1 Vout (max) (V) 28 Iq (typ) (µA) 80 Duty cycle (max) (%) 98
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • AEC-Q100 qualified
    • Temperature grade 1: –40°C to 125°C ambient operating temperature range
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • Input voltage range: 4 V to 36 V
    • 1-A continuous output current
    • Minimum switching-on time: 60 ns
    • 2.1-MHz 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 TPS560430-Q1
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
    • Fixed 3.3-V and 5.0-V output option
  • Create a custom design using the LMR50410-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified
    • Temperature grade 1: –40°C to 125°C ambient operating temperature range
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • Input voltage range: 4 V to 36 V
    • 1-A continuous output current
    • Minimum switching-on time: 60 ns
    • 2.1-MHz 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 TPS560430-Q1
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
    • Fixed 3.3-V and 5.0-V output option
  • Create a custom design using the LMR50410-Q1 with the WEBENCH Power Designer

The LMR50410-Q1 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 automotive applications for power conditioning from an unregulated source.

The LMR50410-Q1 operates at 2.1-MHz 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-Q1 is available in SOT-23-6 package.

The LMR50410-Q1 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 automotive applications for power conditioning from an unregulated source.

The LMR50410-Q1 operates at 2.1-MHz 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-Q1 is available in SOT-23-6 package.
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Technical documentation

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* Data sheet LMR50410-Q1 SIMPLE SWITCHER® 4-V to 36-V, 1-A Buck Converter in SOT-23-6 Package datasheet (Rev. A) PDF | HTML 13 Nov 2020
Functional safety information LMR50410-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 16 Oct 2020
Certificate LMR50410QEVM EU Declaration of Conformity (DoC) 22 Jul 2020
EVM User's guide LMR50410QEVM User's Guide PDF | HTML 21 Jul 2020

Design & development

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

Evaluation board

LMR50410QEVM — Automotive 4-V to 36-V, 1-A synchronous step-down converter evaluation module

The LMR50410QEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR50410-Q1 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 | HTML
Not available on TI.com
Simulation model

LMR50410-Q1 PSpice Model

SLUM747.ZIP (99 KB) - PSpice Model
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Simulation model

LMR50410Y3F-Q1 PSpice Transient Model

SLUM770.ZIP (507 KB) - PSpice Model
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Simulation model

LMR50410Y5F-Q1 PSpice Transient Model

SLUM772.ZIP (262 KB) - PSpice Model
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Simulation model

LMR50410YF-Q1 PSpice Unencrypted Transient Model

SLUM767.ZIP (140 KB) - PSpice Model
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Calculation tool

SLURAZ6 — LMR50410-Q1 Quick Start Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LMR50410-Q1 — Automotive qualified SIMPLE SWITCHER 4-V to 36-V, 1-A synchronous step-down converter
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Reference designs

PMP22992 — Dual 15-V, 120-mA isolated bias power supply reference design using buck and push-pull converters

This isolated power supply provides dual +15-V outputs at 120 mA each. This power supply is designed for biasing a MOSFET-based power stage that generates excitation for a separately excited synchronous motor (SSM). This design uses a combination of the LMR50410-Q1 buck pre-regulator and (...)
Test report: PDF
Schematic: PDF
Package Pins Download
SOT-23 (DBV) 6 View options
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Ordering & quality

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