Home Power management AC/DC & DC/DC converters (integrated FET)
Home
Power management
AC/DC & DC/DC converters (integrated FET)

LMR51430

ACTIVE

SIMPLE SWITCHER® 4.5-V to 36-V, 3-A synchronous buck converter with 40-µA IQ

Order now
Data sheet

LMR51430

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Soft Start Fixed Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 34.2 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1100 Features Enable, Forced PWM, Light Load Efficiency, Soft Start Fixed Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 34.2 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.5-V to 36-V input voltage range
    • 3-A continuous output current
    • 70-ns minimum switching on time
    • 500-kHz and 1.1-MHz fixed switching frequency options
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Start-up with prebiased output
    • Internal short circuit protection with hiccup mode
    • ±1.5% tolerance voltage reference
    • Precision enable
  • 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 TPS54202 and TPS54302
  • PFM and forced PWM (FPWM) options available
  • Create a custom design using the LMR51430 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.5-V to 36-V input voltage range
    • 3-A continuous output current
    • 70-ns minimum switching on time
    • 500-kHz and 1.1-MHz fixed switching frequency options
    • –40°C to 150°C junction temperature range
    • 98% maximum duty cycle
    • Start-up with prebiased output
    • Internal short circuit protection with hiccup mode
    • ±1.5% tolerance voltage reference
    • Precision enable
  • 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 TPS54202 and TPS54302
  • PFM and forced PWM (FPWM) options available
  • Create a custom design using the LMR51430 with the WEBENCH Power Designer

The LMR51430 is a wide-VIN, easy-to-use SIMPLE SWITCHER power converter synchronous buck converter capable of driving up to 3-A load current. With a wide input range of 4.5 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51430 operates at 500-kHz and 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. The device has a 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 LMR51430 is available in a 6-pin SOT-23 package.

The LMR51430 is a wide-VIN, easy-to-use SIMPLE SWITCHER power converter synchronous buck converter capable of driving up to 3-A load current. With a wide input range of 4.5 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51430 operates at 500-kHz and 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. The device has a 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 LMR51430 is available in a 6-pin SOT-23 package.
filter Find other AC/DC & DC/DC converters (integrated FET)
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet LMR51430 SIMPLE SWITCHER® Power Converter 4.5-V to 36-V, 3-A, Synchronous Buck Converter in a SOT-23 Package datasheet (Rev. A) PDF | HTML 23 Nov 2022
User guide LMR51430 Buck Regulator Evaluation Module User's Guide PDF | HTML 07 Apr 2022
Certificate LMR51430EVM EU RoHS Declaration of Conformity (DoC) 09 Mar 2022
Functional safety information LMR514x0 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

LMR51430EVM — LMR51430 evaluation module, 4.5-V to 36-V, 3-A synchronous step-down converter

The LMR51430EVM evaluation module (EVM) is a fully assembled and tested circuit for designers to evaluate the operation and performance of the LMR51430 4.5-V to 36-V, 3-A synchronous step-down converter. The board has jumper connector to enable pin. This EVM has simple pins and is very easy-to-use (...)

User guide: PDF | HTML
Not available on TI.com
Package Pins CAD symbols, footprints & 3D models
SOT-23-THN (DDC) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos