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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LM70880-Q1

PRESENTACIÓN PRELIMINAR

Convertidor reductor síncrono CC/CC de baja EMI, entrada de 4.5 V a 80 V y 8 A, de alta densidad par

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LM70880-Q1

PRESENTACIÓN PRELIMINAR
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Detalles del producto

Rating Automotive Operating temperature range (°C) -40 to 150 Type DC/DC converter Iout (max) (A) 8 Vin (min) (V) 4.5 Vin (max) (V) 80 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Low Noise, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Stackable, Thermal shutdown, UVLO adjustable Control mode Peak-Current Vout (min) (V) 0.8 Vout (max) (V) 55 Iq (typ) (A) 0.0000065
Rating Automotive Operating temperature range (°C) -40 to 150 Type DC/DC converter Iout (max) (A) 8 Vin (min) (V) 4.5 Vin (max) (V) 80 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Low Noise, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Stackable, Thermal shutdown, UVLO adjustable Control mode Peak-Current Vout (min) (V) 0.8 Vout (max) (V) 55 Iq (typ) (A) 0.0000065
VQFN (RRX) 29 36 mm² 6 x 6
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
    • Wide input voltage range: 4.5 V to 80 V
    • 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable outputs from 0.8 V to 55 V
    • Dual-phase control enables paralleling two devices for higher current applications
    • Shutdown mode current: 2.3 µA
    • No-load sleep current: 6.5 µA
  • Optimized for low EMI requirements
    • Facilitates CISPR 25 Class 5 compliance
    • Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
    • Switching frequency: 200 kHz to 2.2 MHz
    • Pin-configurable AUTO or FPWM operation
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • Enable, power-good, and thermal shutdown
    • Internal or external loop compensation
  • 6-mm × 6-mm thermally optimized, RoHS compliant, QFN-29 package with Pb-Free plating
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
    • Wide input voltage range: 4.5 V to 80 V
    • 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable outputs from 0.8 V to 55 V
    • Dual-phase control enables paralleling two devices for higher current applications
    • Shutdown mode current: 2.3 µA
    • No-load sleep current: 6.5 µA
  • Optimized for low EMI requirements
    • Facilitates CISPR 25 Class 5 compliance
    • Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
    • Switching frequency: 200 kHz to 2.2 MHz
    • Pin-configurable AUTO or FPWM operation
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • Enable, power-good, and thermal shutdown
    • Internal or external loop compensation
  • 6-mm × 6-mm thermally optimized, RoHS compliant, QFN-29 package with Pb-Free plating

The LM70880-Q1 is a compact, easy-to-use, 4.5-V to 80-V, ultra-low I Q, synchronous step-down DC/DC converter featuring a versatile buck controller and a pair of power MOSFETs designed for delivering of up to 8 A of output current at fixed output voltages of 3.3 V, 5 V, 12 V, or an adjustable output.

The converter uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM70880-Q1 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16 A of output current.

The LM70880-Q1 features a unique Dual Random Spread Spectrum (DRSS) function that combines a low-frequency triangular modulation with a high-frequency cycle-by-cycle random modulation for improved EMI performance across a high range of radio frequency bands.

Additional features of the LM70880-Q1 include user-selectable diode emulation for lower current consumption at light-load conditions, open-drain Power-Good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 2.75-ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM70880-Q1 converter comes in a 6-mm × 6-mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).

The LM70880-Q1 is a compact, easy-to-use, 4.5-V to 80-V, ultra-low I Q, synchronous step-down DC/DC converter featuring a versatile buck controller and a pair of power MOSFETs designed for delivering of up to 8 A of output current at fixed output voltages of 3.3 V, 5 V, 12 V, or an adjustable output.

The converter uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM70880-Q1 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16 A of output current.

The LM70880-Q1 features a unique Dual Random Spread Spectrum (DRSS) function that combines a low-frequency triangular modulation with a high-frequency cycle-by-cycle random modulation for improved EMI performance across a high range of radio frequency bands.

Additional features of the LM70880-Q1 include user-selectable diode emulation for lower current consumption at light-load conditions, open-drain Power-Good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 2.75-ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM70880-Q1 converter comes in a 6-mm × 6-mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).
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* Data sheet LM708x0-Q1 80-V, 8-A/6-A/4-A, Automotive, High-Efficiency Buck Converters Optimized for High Power Density datasheet PDF | HTML 06 sep 2023
EVM User's guide LM70880-Q1 Buck Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 06 mar 2024
Certificate LM70880QEVM EU Declaration of Conformity (DoC) 20 jul 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

LM70880QEVM — Módulo de evaluación LM70880-Q1

‌El módulo de evaluación de alta densidad LM70880QEVM se diseñó para utilizar un carril de entrada de alta tensión regulado o no regulado que va de 8 V a 72 V para producir una tensión de salida regulada de forma estricta de 5 V en corrientes de carga de hasta 8 A. ‌El LM70880-Q1 ofrece alta (...)
Guía del usuario: PDF | HTML
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Diseños de referencia

PMP31291 — Diseño de referencia de reductor-elevador inversor de 27 W

Este diseño de referencia es una fuente de alimentación flexible y compacta que proporciona un carril de tensión de salida negativa. El diseño incluye un dispositivo LM70880-Q1 (un convertidor reductor de alta eficiencia de 80 V y 8 A). El valor de tensión de salida se puede seleccionar entre tres (...)
Test report: PDF
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VQFN (RRX) 29 Ver opciones
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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

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