Inicio Gestión de la energía AC/DC & DC/DC controllers (external FET)
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Gestión de la energía
AC/DC & DC/DC controllers (external FET)

LM5146-Q1

ACTIVO

Controlador DC/DC reductor síncrono de 100 V para automoción con amplio rango de ciclo de trabajo

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LM5146-Q1

ACTIVO
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Detalles del producto

Vin (min) (V) 5.5 Vin (max) (V) 100 Iout (max) (A) 30 Operating temperature range (°C) -40 to 150 Control mode Voltage mode Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 60 Iq (typ) (A) 0.00175 Duty cycle (max) (%) 99
Vin (min) (V) 5.5 Vin (max) (V) 100 Iout (max) (A) 30 Operating temperature range (°C) -40 to 150 Control mode Voltage mode Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 60 Iq (typ) (A) 0.00175 Duty cycle (max) (%) 99
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 100 V
    • 150°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Lossless RDS(on) or shunt current sensing
    • Optimized for CISPR 25 Class 5 requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC In and SYNC Out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5146-Q1 with WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 100 V
    • 150°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Lossless RDS(on) or shunt current sensing
    • Optimized for CISPR 25 Class 5 requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC In and SYNC Out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5146-Q1 with WEBENCH Power Designer

The LM5146-Q1 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146-Q1 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance 48-V battery automotive applications, ADAS (surround view ECU) and HEV/EV systems.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications

The LM5146-Q1 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146-Q1 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance 48-V battery automotive applications, ADAS (surround view ECU) and HEV/EV systems.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications
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Documentación técnica

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Tipo Título Fecha
* Data sheet LM5146-Q1 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range datasheet (Rev. B) PDF | HTML 02 jun 2021
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 21 abr 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 abr 2021
Functional safety information LM5146-Q1 Functional Safety, FIT Rate, and Failure Mode Distribution (Rev. A) 12 jun 2020
Technical article How to meet European Commission ADAS requirements with TI DC/DC converters PDF | HTML 09 may 2019
Application brief IC Package Features Lead to Higher Reliability in Automotive Systems 20 feb 2019
Application brief Improving RF Power Amplifier Efficiency in 5G Radio Systems 05 sep 2018
EVM User's guide LM5146-Q1EVM User's Guide 10 ago 2018
White paper An overview of radiated EMI specifications for power supplies 05 jun 2018
White paper An overview of conducted EMI specifications for power supplies 01 feb 2018
Application brief Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout 13 nov 2017

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

LM5146-Q1-EVM12V — Módulo de evaluación de controlador reductor síncrono

The LM5146-Q1-EVM12V high density evaluation module (EVM) is designed to showcase the performance of the LM5146-Q1 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a (...)

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

LM5146-Q1 PSpice Unencrypted Transient Model (Rev. A)

SNVMBL1A.ZIP (129 KB) - PSpice Model
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Herramienta de cálculo

LM5146DESIGN-CALC — Herramienta de diseño de inicio rápido LM5146-Q1 de controlador reductor síncrono

Welcome to the LM5146-Q1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the LM5146-Q1 95-V synchronous buck controller. As such, the user can expeditiously arrive at an optimized design to meet the (...)
Guía del usuario: PDF
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Archivo Gerber

LM5146-Q1 Synchronous Buck Controller Design Tool (Rev. A)

SNVC220A.ZIP (2577 KB)
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Disposición de la PCB

LM5146-Q1-EVM12V PCB Layout Files

SNVR473.ZIP (7838 KB)
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Disposición de la PCB

LM5145EVM-HD-20A PCB Layout Files

SNVR500.ZIP (1493 KB)
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Diseños de referencia

PMP30916 — Diseño de referencia de reductor-elevador inversor de -8 V

Este diseño de referencia reductor-elevador inversor utiliza el LM5146-Q1 para generar –8 V a partir de una entrada de telecomunicación de 9 V a 56 V. Por topología, el controlador está referenciado negativamente, por lo que se ha añadido un conmutador de nivel para proporcionar la (...)
Test report: PDF
Diseños de referencia

PMP30600-TH — Diseño de referencia de prerregulador de 20 A para automoción con rango de tensión de entrada amplia

This reference design is a 100-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 100 kHz to ensure low noise operation. This IC (LM5146-Q1)  is designed for automotive with the ability to handle load dump for truck applications. A (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP30600-TL — Diseño de referencia de prerregulador de 10 A para automoción con rango de tensión de entrada amplia

This reference design is a 50-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 250 kHz to ensure low noise operation. This IC (LM5146-Q1) is designed for automotive with the ability to handle load dump for truck applications.  A (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP30600-AL — Diseño de referencia de prerregulador de 10 A para automoción

This reference design is a 50-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 400 kHz to ensure low noise operation. A resistor-capacitor (RC) snubber attenuates noise in the RF band to reduce radiated emissions. To reduce system EMI, (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP30600-AH — Diseño de referencia de prerregulador de 20 A para automoción

This reference design is a 100-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 250 kHz to ensure low noise operation. A resistor-capacitor (RC) snubber attenuates noise in the RF band to reduce radiated emissions. To reduce system EMI, (...)
Test report: PDF
Esquema: PDF
Paquete Pasadores Descargar
VQFN (RGY) 20 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

Soporte y capacitación

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