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Reguladores conmutados CC/CC
Convertidores de CC/CC

LM70860

ACTIVO

Convertidor reductor síncrono CC/CC de baja interferencia electromagnética (EMI), entrada de 4.5 V a

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LM70860

ACTIVO
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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 6 Vin (max) (V) 80 Vin (min) (V) 4.5 Vout (max) (V) 55 Vout (min) (V) 0.8 Features Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Soft Start Fixed, Stackable, Thermal shutdown, UVLO adjustable EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.0000065 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable
Rating Catalog Topology Buck Iout (max) (A) 6 Vin (max) (V) 80 Vin (min) (V) 4.5 Vout (max) (V) 55 Vout (min) (V) 0.8 Features Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Soft Start Fixed, Stackable, Thermal shutdown, UVLO adjustable EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.0000065 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable
VQFN (RRX) 29 36 mm² (6 mm × 6 mm)
  • Functional Safety-Capable
  • Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
    • Wide input voltage range: 4.5V to 80V
    • Shutdown mode current: 2.3µA
    • No-load IQ regulating 48V to 5V: 8.2µA
    • 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 55V
    • Dual-phase operation enabling output currents up to 16A
  • Designed for low EMI requirements
    • Facilitates CISPR 11 Class B compliance
    • Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
    • Switching frequency: 200kHz to 2.2MHz
    • 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
  • 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
  • Create a custom design using the LM708x0 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
    • Wide input voltage range: 4.5V to 80V
    • Shutdown mode current: 2.3µA
    • No-load IQ regulating 48V to 5V: 8.2µA
    • 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 55V
    • Dual-phase operation enabling output currents up to 16A
  • Designed for low EMI requirements
    • Facilitates CISPR 11 Class B compliance
    • Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
    • Switching frequency: 200kHz to 2.2MHz
    • 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
  • 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
  • Create a custom design using the LM708x0 with the WEBENCH Power Designer

The LM708x0 is a family of low-IQ, wide-VIN synchronous buck converters designed for an input voltage range of 4.5V to 80V and delivering up to 8A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.

The LM708x0 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM708x0 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16A of output current.

The LM708x0 features a unique Dual Random Spread Spectrum (DRSS) function that combines low-frequency triangular and high-frequency cycle-by-cycle random modulations for improved EMI performance across a wide range of frequency bands.

Additional features of the LM708x0 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 2.8ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM708x0 converter comes in a 6mm × 6mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).

The LM708x0 is a family of low-IQ, wide-VIN synchronous buck converters designed for an input voltage range of 4.5V to 80V and delivering up to 8A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.

The LM708x0 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM708x0 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16A of output current.

The LM708x0 features a unique Dual Random Spread Spectrum (DRSS) function that combines low-frequency triangular and high-frequency cycle-by-cycle random modulations for improved EMI performance across a wide range of frequency bands.

Additional features of the LM708x0 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 2.8ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM708x0 converter comes in a 6mm × 6mm 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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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM708x0 80V, 8A/6A/4A, High-Efficiency Buck Converters Designed for High Power Density datasheet PDF | HTML 19/09/2024
Nota sobre la aplicación Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML 2/10/2024
Información sobre seguridad funcional LM70880, LM70860, and LM70840 Functional Safety FIT Rate, FMD, and Pin FMA PDF | HTML 19/09/2024
Nota sobre la aplicación Reducing Conducted EMI in a Buck Converter for 48 V Automotive Applications PDF | HTML 13/12/2023
Libro electrónico An Engineer’s Guide to Low EMI in DC/DC Regulators 21/04/2021
Artículo técnico Using DC/DCs buck converters to power modern safety features in commercial vehicle PDF | HTML 27/07/2020
Artículo técnico How to meet European Commission ADAS requirements with TI DC/DC converters PDF | HTML 9/05/2019
Artículo técnico Top three qualities to consider when designing a video doorbell power supply PDF | HTML 25/09/2018
Application brief Improving RF Power Amplifier Efficiency in 5G Radio Systems 5/09/2018
Informe An overview of radiated EMI specifications for power supplies 5/06/2018
Artículo técnico Effects of IC package on EMI performance PDF | HTML 22/05/2018
Informe An overview of conducted EMI specifications for power supplies 1/02/2018

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

LM706A0QEVM — Módulo de evaluación LM706A0-Q1

El módulo de evaluación (EVM) de alta densidad LM706A0-Q1 está diseñado para usar un carril de entrada de alta tensión regulado o no regulado de 8 V a 65 V para producir una tensión de salida estrictamente regulada de 3.3 V en corrientes de carga de hasta 10 A. Esta solución CC/CC de amplio rango (...)

Guía del usuario: PDF | HTML
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Placa de evaluación

LM70880QEVM — Módulo de evaluación LM70880-Q1

El módulo de evaluación de alta densidad LM70880QEVM está diseñado 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 estrictamente regulada 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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Modelo de simulación

LM70880-Q1 PSpice Transient model (Rev. A)

SNVMCD7A.ZIP (3292 KB) - Modelo PSpice
Productos y hardware compatibles
Herramienta de cálculo

LM70XX0-CALC — LM70XX0 quickstart design tool calculator

Quickstart calculator for LM70XX0
Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (RRX) 29 Ultra Librarian
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Soporte y capacitación

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