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LMR66430-EP

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Enhanced-product 36V 3A synchronous step-down converter with 1.5µA IQ and low EMI

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Data sheet

LMR66430-EP

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -55 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Frequency synchronization, Light Load Efficiency, Low Noise, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO adjustable, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 35 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -55 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Forced PWM, Frequency synchronization, Light Load Efficiency, Low Noise, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO adjustable, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 35 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 98
VQFN-FCRLF (RXB) 14 6.76 mm² 2.6 x 2.6
  • Wide input voltage range
    • 3.35V to 36V rising edge
    • 2.7V to 36V falling edge
    • 42V absolute maximum
  • Integrated 132mΩ and 75mΩ MOSFETs
  • Optimized for low EMI requirements:
    • Dual Random Spread Spectrum reduces peak emissions
    • Pin selectable FPWM mode for constant frequency at light loads and FSW synchronization with MODE/SYNC pin
    • Adjustable FSW: 200kHz – 2.2MHz with RT pin
  • Miniature design size and low component cost:
    • 2.6mm × 2.6mm enhanced HotRod™ QFN package with wettable flanks and internal lead free solder
    • Internal control loop compensation
  • Wide input voltage range
    • 3.35V to 36V rising edge
    • 2.7V to 36V falling edge
    • 42V absolute maximum
  • Integrated 132mΩ and 75mΩ MOSFETs
  • Optimized for low EMI requirements:
    • Dual Random Spread Spectrum reduces peak emissions
    • Pin selectable FPWM mode for constant frequency at light loads and FSW synchronization with MODE/SYNC pin
    • Adjustable FSW: 200kHz – 2.2MHz with RT pin
  • Miniature design size and low component cost:
    • 2.6mm × 2.6mm enhanced HotRod™ QFN package with wettable flanks and internal lead free solder
    • Internal control loop compensation

The LMR66430-EP is a small 36V, 3A, synchronous step-down DC/DC converter with an enhanced HotRod QFN package. This easy-to-use converter supports a wide input voltage range of 2.7V to 36V (after start-up or after operating) with transients up to 42V.

The LMR66430-EP is specifically designed to meet low standby power requirements for always-on, applications. Auto mode enables frequency foldback when operating at light loads, allowing high light load efficiency. A seamless transition between pulse width modulation (PWM) and pulse frequency modulation (PFM) modes along with very low MOSFET ON resistances makes sure there is exceptional efficiency across the entire load range. The control architecture (peak current mode) and feature set are an excellent choice for an ultra-small design size with minimal output capacitance. The device minimizes input filter size by using dual-random spread spectrum (DRSS), a low-EMI enhanced HotRod QFN package, and an optimized pinout. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential short circuits between pins. The rich feature set of the LMR66430-EP is designed to simplify implementation for a wide range of industrial end equipment.

The LMR66430-EP is a small 36V, 3A, synchronous step-down DC/DC converter with an enhanced HotRod QFN package. This easy-to-use converter supports a wide input voltage range of 2.7V to 36V (after start-up or after operating) with transients up to 42V.

The LMR66430-EP is specifically designed to meet low standby power requirements for always-on, applications. Auto mode enables frequency foldback when operating at light loads, allowing high light load efficiency. A seamless transition between pulse width modulation (PWM) and pulse frequency modulation (PFM) modes along with very low MOSFET ON resistances makes sure there is exceptional efficiency across the entire load range. The control architecture (peak current mode) and feature set are an excellent choice for an ultra-small design size with minimal output capacitance. The device minimizes input filter size by using dual-random spread spectrum (DRSS), a low-EMI enhanced HotRod QFN package, and an optimized pinout. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential short circuits between pins. The rich feature set of the LMR66430-EP is designed to simplify implementation for a wide range of industrial end equipment.
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Type Title Date
* Data sheet LMR66430-EP 36V, 3A, Ultra-Small, Synchronous Step-Down Converter datasheet 12 Sep 2024
* Radiation & reliability report LMR66430-EP Enhanced Product Qualification and Reliability Report PDF | HTML 27 Sep 2024

Design & development

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Evaluation board

LMQ66430-2EVM — LMQ66430 evaluation module for 36-V 3-A synchronous step-down converter with enhanced HotRod™ QFN

The LMQ66430-2EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LMQ66430-Q1 device, a synchronous step-down DC/DC converter capable of driving up to 3 A of load current from an input voltage of up to 36 V. The LMQ66430-Q1 has ultra-low operating quiescent (...)

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VQFN-FCRLF (RXB) 14 Ultra Librarian
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