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)

LM62440-Q1

ACTIVO

Convertidor reductor síncrono de 3 V a 36 V, 4 A y bajo ruido para automoción

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LM62440-Q1

ACTIVO
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Detalles del producto

Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34 Iq (typ) (µA) 7 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 4 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 400 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34 Iq (typ) (µA) 7 Duty cycle (max) (%) 98
VQFN-HR (RJR) 14 14 mm² 4 x 3.5
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, TJ
  • Functional Safety-Capable
  • Optimized for ultra low EMI requirements
    • HotRod™ package and parallel input path minimize switch node ringing
    • Spread spectrum reduces peak emissions
    • 2.1-MHz and 400-kHz factory options
    • Adjustable SW node rise time
    • Pin selectable FPWM mode for constant frequency at light loads
  • Designed for automotive applications
    • Supports 42-V automotive load dump
    • ±1% total output regulation accuracy
    • VOUT adjustable from 1 V to 95% of VIN, with factory options for 5-V and 3.3-V fixed output voltages
  • High efficiency power conversion at all loads
    • 7-µA no load current at 13.5 VIN, 3.3 VOUT
    • 83% PFM efficiency at 1 mA, 13.5 VIN, 5 VOUT
    • External bias option for improved efficiency
  • Suitable for scalable power supplies
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, TJ
  • Functional Safety-Capable
  • Optimized for ultra low EMI requirements
    • HotRod™ package and parallel input path minimize switch node ringing
    • Spread spectrum reduces peak emissions
    • 2.1-MHz and 400-kHz factory options
    • Adjustable SW node rise time
    • Pin selectable FPWM mode for constant frequency at light loads
  • Designed for automotive applications
    • Supports 42-V automotive load dump
    • ±1% total output regulation accuracy
    • VOUT adjustable from 1 V to 95% of VIN, with factory options for 5-V and 3.3-V fixed output voltages
  • High efficiency power conversion at all loads
    • 7-µA no load current at 13.5 VIN, 3.3 VOUT
    • 83% PFM efficiency at 1 mA, 13.5 VIN, 5 VOUT
    • External bias option for improved efficiency
  • Suitable for scalable power supplies

The LM62440-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 4 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42-V tolerance supports load dump for durations of 400 ms. The LM62440-Q1 implements soft recovery from dropout, eliminating overshoot on the output.

The LM62440-Q1 is specifically designed for minimal EMI. The device incorporates pseudorandom spread spectrum, adjustable SW node rise time, a low-EMI VQFN-HR package featuring low switch node ringing, and an optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, either 2.1-MHz or 400-kHz frequency factory options can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, provides exceptional efficiency across the entire load range.

The LM62440-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 4 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42-V tolerance supports load dump for durations of 400 ms. The LM62440-Q1 implements soft recovery from dropout, eliminating overshoot on the output.

The LM62440-Q1 is specifically designed for minimal EMI. The device incorporates pseudorandom spread spectrum, adjustable SW node rise time, a low-EMI VQFN-HR package featuring low switch node ringing, and an optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, either 2.1-MHz or 400-kHz frequency factory options can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, provides exceptional efficiency across the entire load range.
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Documentación técnica

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* Data sheet LM62440-Q1 Automotive 3-V to 36-V, 4-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. E) PDF | HTML 18 abr 2022
Functional safety information LM62440-Q1 Functional Safety, FIT Rate, Failure Mode Distribution, and Pin FMA (Rev. A) PDF | HTML 17 may 2022
Application note How to Migrate Between LM614xx and LM624xx Product Families PDF | HTML 01 nov 2021
Technical article Introduction to EMI: Standards, causes and mitigation techniques PDF | HTML 21 abr 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 abr 2021
Technical article Powering levels of autonomy: a quick guide to DC/DC solutions for SAE autonomy lev 18 nov 2020
Technical article Optimizing flip-chip IC thermal performance in automotive designs PDF | HTML 11 dic 2019
EVM User's guide LM62440-Q1 EVM User's Guide 22 jun 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

LM62440EVM — Módulo de evaluación de convertidor reductor síncrono de 36 V, 4 A, 5 V, 2 MHz y bajo EMI

The LM62440 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM62440 synchronous step-down converter.  The LM62440 provides exceptional efficiency, low Iq, and low EMI in small solution size.
Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

LP877451Q1EVM — Módulo de evaluación LP8774x-Q1 del PMIC de configuración de bajo nivel de ruido con reductor triple

El dispositivo LP8774x-Q1 está diseñado para satisfacer los requisitos de administración de potencia de los circuitos integrados monolíticos de microondas (MMIC) para radares AWR e IWR en múltiples aplicaciones de radar automotriz e industrial. El dispositivo tiene tres convertidores de CC/CC (...)

Guía del usuario: PDF | HTML
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Modelo de simulación

LM62440APP-Q1 PSpice Transient Model

SNVMC36.ZIP (142 KB) - PSpice Model
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Modelo de simulación

LM62440BPP-Q1 PSpice Transient Model

SNVMC37.ZIP (280 KB) - PSpice Model
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Modelo de simulación

LM62440CPP-Q1 PSpice Transient Model

SNVMC38.ZIP (280 KB) - PSpice Model
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Disposición de la PCB

LM62440 EVM Design files Upload

SNVR477.ZIP (3141 KB)
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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN-HR (RJR) 14 Ultra Librarian
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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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