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Convertidores de CA/CC y CC/CC (FET integrado)

LMQ66420

ACTIVO

Convertidor reductor síncrono de 36 V y 2 A de baja EMI con IQ de 1.5 µA

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LMQ66420

ACTIVO
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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 35 Vout (min) (V) 1 Features Enable, Fixed Output, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 98 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 35 Vout (min) (V) 1 Features Enable, Fixed Output, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 1.5 Duty cycle (max) (%) 98 Type Converter
VQFN-FCRLF (RXB) 14 6.76 mm² 2.6 x 2.6
  • Functional Safety-Capable
  • Designed for industrial applications:
    • Junction temperature range –40°C to +150°C
    • NC pin between critical pins for better reliability
    • Best in-class pin FMEA
    • Input transient protection up to 42V
    • Wide input voltage range after start-up: 2.7V (falling threshold) to 36V
    • Adjustable output up to 95% of VIN, 3.3V and 5V fixed VOUT options available
  • ZEN 2 switcher
    • Integrated bypass and boot capacitors reduce EMI
    • Dual random spread spectrum reduces peak emissions
    • Enhanced HotRod™ QFN package minimizes switch node ringing
    • Adjustable FSW: 200kHz – 2.2MHz with RT pin
  • Greater than 85% efficiency at 1mA
  • Miniature design size and low component cost:
    • Integrated input bypass capacitors and bootstrap capacitor reducing EMI
    • 2.6mm × 2.6mm enhanced HotRod QFN package with wettable flanks
    • Internal control loop compensation
  • Functional Safety-Capable
  • Designed for industrial applications:
    • Junction temperature range –40°C to +150°C
    • NC pin between critical pins for better reliability
    • Best in-class pin FMEA
    • Input transient protection up to 42V
    • Wide input voltage range after start-up: 2.7V (falling threshold) to 36V
    • Adjustable output up to 95% of VIN, 3.3V and 5V fixed VOUT options available
  • ZEN 2 switcher
    • Integrated bypass and boot capacitors reduce EMI
    • Dual random spread spectrum reduces peak emissions
    • Enhanced HotRod™ QFN package minimizes switch node ringing
    • Adjustable FSW: 200kHz – 2.2MHz with RT pin
  • Greater than 85% efficiency at 1mA
  • Miniature design size and low component cost:
    • Integrated input bypass capacitors and bootstrap capacitor reducing EMI
    • 2.6mm × 2.6mm enhanced HotRod QFN package with wettable flanks
    • Internal control loop compensation

The LMQ664x0 is the industry smallest 36V, 3A (available in 2A and 1A variants) synchronous step-down DC/DC converter with an integrated bypass and bootstrap capacitor in 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 LMQ664x0 is specifically designed to meet low standby power requirements for always-on, industrial applications. Auto mode enables frequency foldback when operating at light loads, allowing an unloaded typical current consumption of 1.5µA at 13.5VIN and high light load efficiency. A seamless transition between PWM and 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 optimized 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 RT pin can be used to set the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential failures (excellent choice pin FMEA). ZEN 2 switcher features enable the device to support ultra low-EMI applications. The rich feature set of the LMQ664x0 is designed to simplify implementation for a wide range of industrial end equipment.

The LMQ664x0 is the industry smallest 36V, 3A (available in 2A and 1A variants) synchronous step-down DC/DC converter with an integrated bypass and bootstrap capacitor in 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 LMQ664x0 is specifically designed to meet low standby power requirements for always-on, industrial applications. Auto mode enables frequency foldback when operating at light loads, allowing an unloaded typical current consumption of 1.5µA at 13.5VIN and high light load efficiency. A seamless transition between PWM and 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 optimized 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 RT pin can be used to set the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential failures (excellent choice pin FMEA). ZEN 2 switcher features enable the device to support ultra low-EMI applications. The rich feature set of the LMQ664x0 is designed to simplify implementation for a wide range of industrial end equipment.
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* Data sheet LMQ664x0 36V, 1A, 2A, and 3A, Ultra-Small, Synchronous ZEN 2 Step-Down Converter With Integrated VIN Bypass and CBOOT Capacitors datasheet (Rev. C) PDF | HTML 09 dic 2025

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Placa de evaluación

LMQ66430-2EVM — Módulo de evaluación LMQ66430 para convertidor reductor síncrono de 36 V y 3 A con HotRod™ QFN mejor

El módulo de evaluación (EVM) LMQ66430-2EVM ayuda a los diseñadores a evaluar el funcionamiento y el rendimiento del dispositivo LMQ66430-Q1, un convertidor CC/CC reductor sincrónico capaz de conducir hasta 3 A de corriente de carga a partir de una tensión de entrada de hasta 36 V. El LMQ66430-Q1 (...)

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