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

LMQ644A2-Q1

ACTIVO

Convertidor reductor síncrono de 36 V, 12 A y salida doble de baja IQ para automoción

Haga su pedido ahora
Hoja de datos

LMQ644A2-Q1

ACTIVO
Hoja de datos Haga su pedido ahora

Detalles del producto

Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2.2, 2200 Features Enable, Frequency synchronization, Over Current Protection, Power good, Spread Spectrum, Synchronous Rectification, Wettable flanks package Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 20 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2.2, 2200 Features Enable, Frequency synchronization, Over Current Protection, Power good, Spread Spectrum, Synchronous Rectification, Wettable flanks package Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 20 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
VQFN-FCRLF (RXA) 24 20 mm² 5 x 4
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Operation up to 150°C junction temperature
  • Functional Safety-Capable
  • Designed for Low EMI
    • Symmetrical input voltage pins with > 1mm clearance to ground
    • Four 22nF integrated VIN to GND bypass capacitors
      • Two bypass capacitors placed in series between each VIN and GND for high reliability
    • Pin selectable spread spectrum option
    • Pin selectable FPWM or auto mode operation
    • Enhanced HotRod™ QFN (25) package with wettable flanks
    • Switching frequency from 100kHz to 2.2MHz
    • Meets CISPR 25 class 5 EMI requirements
  • Single and dual-output features
    • Wide input voltage range of 3V to 36V
    • 1% accurate fixed 3.3V, 5V or adjustable outputs from 0.8V to 20V
    • Hiccup-mode overcurrent protection and thermal shutdown protection with hysteresis
    • Precision ENABLE and PGOOD functions
    • 50ns tON(min) for high VIN / VOUT ratio
    • 80ns tOFF(min) for low dropout
  • Versatile dual-output operation
    • Shutdown mode current: 0.5µA typical
    • No-load standby current: 9µA typical
    • Built-in compensation and 3ms soft start
    • Independent precision ENABLE and PGOOD
  • Adaptable single-output operation
    • > 95% efficient for an 8A load, single output, VIN =12V, VOUT = 5V
    • External compensation and adjustable soft start
    • PGOOD, SYNCIN, and SYNCOUT functions
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Operation up to 150°C junction temperature
  • Functional Safety-Capable
  • Designed for Low EMI
    • Symmetrical input voltage pins with > 1mm clearance to ground
    • Four 22nF integrated VIN to GND bypass capacitors
      • Two bypass capacitors placed in series between each VIN and GND for high reliability
    • Pin selectable spread spectrum option
    • Pin selectable FPWM or auto mode operation
    • Enhanced HotRod™ QFN (25) package with wettable flanks
    • Switching frequency from 100kHz to 2.2MHz
    • Meets CISPR 25 class 5 EMI requirements
  • Single and dual-output features
    • Wide input voltage range of 3V to 36V
    • 1% accurate fixed 3.3V, 5V or adjustable outputs from 0.8V to 20V
    • Hiccup-mode overcurrent protection and thermal shutdown protection with hysteresis
    • Precision ENABLE and PGOOD functions
    • 50ns tON(min) for high VIN / VOUT ratio
    • 80ns tOFF(min) for low dropout
  • Versatile dual-output operation
    • Shutdown mode current: 0.5µA typical
    • No-load standby current: 9µA typical
    • Built-in compensation and 3ms soft start
    • Independent precision ENABLE and PGOOD
  • Adaptable single-output operation
    • > 95% efficient for an 8A load, single output, VIN =12V, VOUT = 5V
    • External compensation and adjustable soft start
    • PGOOD, SYNCIN, and SYNCOUT functions

The LMQ644xx-Q1 is a 36V, synchronous, buck, DC/DC converter for high-current single or dual outputs. The device uses an interleaved, stackable, current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with an output clock supporting up to 6 phases for currents up to 36A. A high-side switch minimum on-time of 50ns gives large step-down ratios, enabling the direct conversion from 12V, 24V, or automotive inputs to low-voltage rails for reduced system complexity and design cost.

The LMQ644xx-Q1 incorporates spread spectrum in an optimized enhanced HotRod QFN package, with wettable flanks, and four 22nF high frequency integrated capacitors to minimize EMI. Dual Random Spread Spectrum (DRSS) frequency hopping is set to ±10% (typical), drastically reducing emissions through a combination of triangular and pseudo-random modulation. A bias pin allows the LMQ644xx-Q1 to save losses by powering the device from the output of the converter, achieving a 9µA no-load quiescent current to extend the operating run-time in battery-powered systems. The LMQ644xx-Q1 can maintain high efficiency light-load operation even when stacking multiple devices for high efficiency over the full load range.

The LMQ644xx-Q1 is a 36V, synchronous, buck, DC/DC converter for high-current single or dual outputs. The device uses an interleaved, stackable, current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with an output clock supporting up to 6 phases for currents up to 36A. A high-side switch minimum on-time of 50ns gives large step-down ratios, enabling the direct conversion from 12V, 24V, or automotive inputs to low-voltage rails for reduced system complexity and design cost.

The LMQ644xx-Q1 incorporates spread spectrum in an optimized enhanced HotRod QFN package, with wettable flanks, and four 22nF high frequency integrated capacitors to minimize EMI. Dual Random Spread Spectrum (DRSS) frequency hopping is set to ±10% (typical), drastically reducing emissions through a combination of triangular and pseudo-random modulation. A bias pin allows the LMQ644xx-Q1 to save losses by powering the device from the output of the converter, achieving a 9µA no-load quiescent current to extend the operating run-time in battery-powered systems. The LMQ644xx-Q1 can maintain high efficiency light-load operation even when stacking multiple devices for high efficiency over the full load range.

filter Buscar otro/a Convertidores de CA/CC y CC/CC (FET integrado)
Descargar Ver vídeo con transcripción Video

Documentación técnica

star =Principal documentación para este producto seleccionada por TI
No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 8
Tipo Título Fecha
* Data sheet LMQ644xx-Q1 3V to 36V, Low IQ , Dual 6/5/4A, Automotive Buck Converter Optimized for Power Density and Low EMI datasheet (Rev. A) PDF | HTML 08 jul 2024
Technical article Four power supply challenges in ADAS front camera designs PDF | HTML 05 ene 2024
EVM User's guide LMQ644A2QEVM-D2100 36-V, Dual, 6-A Outputs, Synchronous, Buck Converter PDF | HTML 10 jul 2023
EVM User's guide LMQ644A2QEVM-S2100 36-V, 12-A, Single-Output, Dual- Phase, Synchronous Buck PDF | HTML 10 jul 2023
User guide LMQ644A2-Q1 6-Phase Buck Regulator Design for Automotive ADAS Applications PDF | HTML 05 jul 2023
Functional safety information LMQ644xx-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 27 jun 2023
Certificate LMQ644A2QEVM-S2100 EU Declaration of Conformity (DoC) 12 may 2023
Certificate LMQ644A2QEVM-D2100 EU Declaration of Conformity (DoC) 11 may 2023

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LMQ644A2QEVM-D2100 — Módulo de evaluación LMQ644A2-Q1 para convertidor reductor síncrono con salida doble

El módulo de evaluación (EVM) LMQ644A2QEVM-D2100 evalúa las características y el rendimiento del LMQ644A2-Q1, convertidor reductor dual CC/CC con MOSFET de alimentación integrados. El EVM proporciona salidas duales de 6 A. La tensión de salida se puede programar individualmente a 3.3 V y 5 V fijos (...)

Guía del usuario: PDF | HTML
No disponible en TI.com
Placa de evaluación

LMQ644A2QEVM-S2100 — Módulo de evaluación LMQ644A2-Q1 para convertidor reductor síncrono con salida única

El módulo de evaluación (EVM) LMQ644A2QEVM-S2100 evalúa las características y el rendimiento del LMQ644A2-Q1, convertidor reductor dual CC/CC con MOSFET de alimentación integrados. La EVM proporciona una salida de 12 A. La tensión de salida se puede programar individualmente a 3.3 V y 5 V fijos o (...)

Guía del usuario: PDF | HTML
No disponible en TI.com
Modelo de simulación

LMQ644A2 PSPICE transient model

SNVMCC1.ZIP (249 KB) - PSpice Model
Descargar
Herramienta de cálculo

LMQ644XX-DESIGN-CALC — LMQ644XX quick-start design tool

This stand-alone tool facilitates and assists with the design of a DC/DC buck regulator based on the LM(Q)64480/A0/A2-Q1 dual channel buck converter. The user can expeditiously arrive at an optimized design to meet the application requirements.
Productos y hardware compatibles

Productos y hardware compatibles

Productos
Convertidores de CA/CC y CC/CC (FET integrado)
LMQ644A2-Q1 — Convertidor reductor síncrono de 36 V, 12 A y salida doble de baja IQ para automoción
Descargar
Diseños de referencia

PMP41085 — Automotive 100W infotainment display module reference design with functional safety capabilities<

This reference design showcases the 100W automotive infotainment display module power reference design with cold crank, load dump and FuSa Capabilities.

The LM74900-Q1 is the first stage of the design playing a role of protection for negative input voltage, undervoltage, locked output, and (...)

Test report: PDF
Diseños de referencia

PMP23117 — Diseño de referencia de 3.3 V, 24 A y cuatro fases para aplicaciones automotrices

Este diseño de referencia de cuatro fases proporciona 3.3 VOUT de salida de tensión a 24 A desde una fuente de alimentación automotriz de 3.8 V a 16 V. El diseño utiliza dos reguladores reductores síncronos LMQ644A2-Q1 de doble canal que funcionan a una frecuencia de conmutación nominal de (...)
Test report: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN-FCRLF (RXA) 24 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

Ver todos los temas del foro en inglés

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

Si tiene preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI. ​​​​​​​​​​​​​​

Videos