Inicio Gestión de la energía Convertidores de CA/CC y CC/CC (FET integrado)
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Gestión de la energía
Convertidores de CA/CC y CC/CC (FET integrado)
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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

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Detalles del producto

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification 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) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Fixed Output, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification 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
  • 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 42 V
    • Wide input voltage range after start-up: 2.7 V (falling threshold) to 36 V
    • Adjustable output up to 95% of V IN, 3.3-V, and 5-V fixed V OUT options available
  • Optimized for low EMI requirements:
    • Integrated bypass and boot capacitors reduce EMI
    • Dual Random Spread Spectrum reduces peak emissions
    • Enhanced HotRod™ QFN package minimizes switch node ringing
    • Adjustable F SW: 200 kHz – 2.2 MHz with RT pin
  • Greater than 85% efficiency at 1 mA
  • Miniature solution size and low component cost:
    • Integrated input bypass capacitors and bootstrap capacitor reducing EMI
    • 2.6-mm × 2.6-mm 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 42 V
    • Wide input voltage range after start-up: 2.7 V (falling threshold) to 36 V
    • Adjustable output up to 95% of V IN, 3.3-V, and 5-V fixed V OUT options available
  • Optimized for low EMI requirements:
    • Integrated bypass and boot capacitors reduce EMI
    • Dual Random Spread Spectrum reduces peak emissions
    • Enhanced HotRod™ QFN package minimizes switch node ringing
    • Adjustable F SW: 200 kHz – 2.2 MHz with RT pin
  • Greater than 85% efficiency at 1 mA
  • Miniature solution size and low component cost:
    • Integrated input bypass capacitors and bootstrap capacitor reducing EMI
    • 2.6-mm × 2.6-mm enhanced HotRod™ QFN package with wettable flanks
    • Internal control loop compensation

The LMQ664x0 is the industry smallest 36-V, 3-A (available in 2-A and 1-A 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 2.7 V to 36 V (after start-up or after operating) with transients up to 42 V.

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 1.5 µA at 13.5 V IN 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 solution 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 pin-out. 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 (optimal pin FMEA). 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 36-V, 3-A (available in 2-A and 1-A 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 2.7 V to 36 V (after start-up or after operating) with transients up to 42 V.

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 1.5 µA at 13.5 V IN 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 solution 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 pin-out. 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 (optimal pin FMEA). The rich feature set of the LMQ664x0 is designed to simplify implementation for a wide range of industrial end equipment.
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Documentación técnica

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* Data sheet LMQ664x0, 36-V, 1-A, 2-A, and 3-A, Ultra-Small, Synchronous Step-Down Converter with Integrated VIN Bypass and CBOOT Capacitors datasheet (Rev. B) PDF | HTML 08 may 2023
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 abr 2024

Diseño y desarrollo

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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 síncrono 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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VQFN-FCRLF (RXB) 14 Ver opciones
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  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
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