Inicio Gestión de la energía Controladores CA/CC y CC/CC (FET externo)

LM5143

ACTIVO

Controlador CC/CC reductor síncrono, apilable, de 3.5 V a 65 V y doble salida con IQ ultrabaja

Detalles del producto

Vin (min) (V) 3.5 Vin (max) (V) 65 Iout (max) (A) 100 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 55 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Multiple Outputs, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 16.5 Duty cycle (max) (%) 99 Number of phases 2 TI functional safety category Functional Safety-Capable
Vin (min) (V) 3.5 Vin (max) (V) 65 Iout (max) (A) 100 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 55 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Multiple Outputs, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 16.5 Duty cycle (max) (%) 99 Number of phases 2 TI functional safety category Functional Safety-Capable
VQFN (RHA) 40 36 mm² 6 x 6
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 65 V
    • 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 55 V
    • 150°C maximum junction temperature
    • 4-µA typical shutdown mode current
    • 15-µA typical no-load standby current
  • Two interleaved synchronous buck channels
    • Dual channel or single-output multiphase
    • 65-ns tON(min) for high VIN/VOUT ratio
    • 60-ns tOFF(min) for low dropout
  • Inherent protection features for robust design
    • Shunt or inductor DCR current sensing
    • Hiccup mode overcurrent protection
    • Independent ENABLE and PGOOD functions
    • Adjustable output voltage soft start
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Optimized for CISPR 11 and CISPR 32 class B conducted and radiatedEMI requirements
    • Slew-rate controlled adaptive gate drivers
    • Spread spectrum reduces peak emissions
  • 100-kHz to 2.2-MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM modes
  • 6-mm × 6-mm VQFN-40 package
  • Create a custom design using the LM5143 with WEBENCH Power Designer
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 65 V
    • 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 55 V
    • 150°C maximum junction temperature
    • 4-µA typical shutdown mode current
    • 15-µA typical no-load standby current
  • Two interleaved synchronous buck channels
    • Dual channel or single-output multiphase
    • 65-ns tON(min) for high VIN/VOUT ratio
    • 60-ns tOFF(min) for low dropout
  • Inherent protection features for robust design
    • Shunt or inductor DCR current sensing
    • Hiccup mode overcurrent protection
    • Independent ENABLE and PGOOD functions
    • Adjustable output voltage soft start
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Optimized for CISPR 11 and CISPR 32 class B conducted and radiatedEMI requirements
    • Slew-rate controlled adaptive gate drivers
    • Spread spectrum reduces peak emissions
  • 100-kHz to 2.2-MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM modes
  • 6-mm × 6-mm VQFN-40 package
  • Create a custom design using the LM5143 with WEBENCH Power Designer

The LM5143 is a 65-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VIN range controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-V inputs to low-voltage rails for reduced system complexity and cost. The LM5143 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.

The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM5143 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.

The LM5143 is a 65-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VIN range controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-V inputs to low-voltage rails for reduced system complexity and cost. The LM5143 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.

The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM5143 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LM5143 3.5-V to 65-V Dual Synchronous Buck DC/DC Controller With Ultra-Low IQ datasheet PDF | HTML 18 mar 2022
Application note Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML 02 oct 2024
Application note How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 16 ago 2023
Functional safety information LM5143 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 16 feb 2022
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 21 abr 2021
Application note LM5143-Q1 4-phase Buck Regulator Design (Rev. A) PDF | HTML 28 abr 2020

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

LM5143-Q1EVM-2100 — Módulo de evaluación de controlador reductor síncrono de doble canal para automoción

The LM5143-Q1-EVM2100 high density evaluation module (EVM) is designed to showcase the performance of the LM5143-Q1 high performance, dual-channel, automotive synchronous buck DC/DC buck controller. It operates over a wide input voltage range of 3.5 V to 36 V to deliver fixed 5-V and 3.3-V outputs (...)
Guía del usuario: PDF
Modelo de simulación

LM5143 PSpice Transient Model

SNVMCA3.ZIP (336 KB) - PSpice Model
Herramienta de cálculo

LM5143DESIGN-CALC LM5143-Q1 Controller Quickstart Design Tool

This stand-alone tool facilitates and assists with the design of a DC/DC buck regulator based on the LM5143-Q1 synchronous buck DC/DC controller with low IQ. The user can expeditiously arrive at an optimized design to meet the application requirements.

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores CA/CC y CC/CC (FET externo)
LM25143 Controlador CC/CC reductor síncrono, apilable, de 3.5 V a 42 V y doble salida con IQ ultrabaja LM25143-Q1 Controlador CC-CC reductor síncrono apilable de 3.5 V a 42 V de baja IQ y doble salida para automoci LM5143 Controlador CC/CC reductor síncrono, apilable, de 3.5 V a 65 V y doble salida con IQ ultrabaja LM5143-Q1 Controlador DC/DC reductor síncrono doble bifásico de 3.5 V a 65 V y baja IQ LM5143A-Q1 Controlador CC-CC reductor síncrono apilable de 3.5 V a 65 V de baja IQ y doble salida para automoci
Desarrollo de hardware
Placa de evaluación
LM5143-Q1EVM-2100 Módulo de evaluación de controlador reductor síncrono de doble canal para automoción
Software
Herramienta de cálculo
LM5143DESIGN-CALC Herramienta de diseño de inicio rápido de controladores LM5143-Q1, LM5143A-Q1, LM5143, LM25143-Q1 y
Diseños de referencia

PMP23262 — Diseño de referencia de convertidor reductor síncrono bifásico de 200 W para automóviles

Este diseño de referencia ofrece potencia para diseños de sistemas avanzados de asistencia al conductor (ADAS), así como aplicaciones de infoentretenimiento y de tablero. El funcionamiento para aplicaciones de automoción incluye subidas de tensión de la batería a 32 V y caídas a 6 V debido a las (...)
Test report: PDF
Diseños de referencia

PMP31210 — Diseño de referencia de convertidor reductor tetrafásico de 700 W con rango de tensión de entrada am

Este diseño de referencia es un convertidor reductor de 700 W que utiliza el dispositivo LM5143A-Q1. Gracias a los reducidos tiempos muertos, los controladores robustos y la posibilidad de ajustar individualmente los márgenes ascendentes y descendentes, la eficiencia resultante es del 98 %. La (...)
Test report: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (RHA) 40 Ultra Librarian

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

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. ​​​​​​​​​​​​​​

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