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Administración de potencia
Reguladores conmutados CC/CC
Convertidores de CC/CC

LMR38020-Q1

ACTIVO

Convertidor de potencia SIMPLE SWITCHER® para automoción, de 4.2 V a 80 V, 2 A, convertidor reductor

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LMR38020-Q1

ACTIVO
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Detalles del producto

Rating Automotive Topology Buck Iout (max) (A) 2 Vin (max) (V) 80 Vin (min) (V) 4.2 Vout (max) (V) 75 Vout (min) (V) 1 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.00004 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable Sector Robotics
Rating Automotive Topology Buck Iout (max) (A) 2 Vin (max) (V) 80 Vin (min) (V) 4.2 Vout (max) (V) 75 Vout (min) (V) 1 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed EMI features Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.00004 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable Sector Robotics
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • 4.2V to 80V input voltage range
    • 2A continuous output current
    • Ultra-low 40µA operating quiescent current
    • > 1.5mm distance between VIN and GND pin
    • 200kHz to 2.2MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with prebiased output
    • ±1.0% tolerance voltage reference at room temperature
    • Precision enable
    • Easy to use device with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 8-pin HSOIC with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
    • Available in 1A, LMR38010-Q1
  • Create a custom design using the LMR38020-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • 4.2V to 80V input voltage range
    • 2A continuous output current
    • Ultra-low 40µA operating quiescent current
    • > 1.5mm distance between VIN and GND pin
    • 200kHz to 2.2MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with prebiased output
    • ±1.0% tolerance voltage reference at room temperature
    • Precision enable
    • Easy to use device with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 8-pin HSOIC with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
    • Available in 1A, LMR38010-Q1
  • Create a custom design using the LMR38020-Q1 with the WEBENCH Power Designer

The LMR38020-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020-Q1 operates during input voltage dips as low as 4.2V, at nearly 100% duty cycle if needed, making the device an excellent choice for 48-V battery automotive applications and MHEV/EV systems.

The LMR38020-Q1 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller design size at high operating frequency.

The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in an 8-pin HSOIC PowerPAD integrated circuit package.

The LMR38020-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020-Q1 operates during input voltage dips as low as 4.2V, at nearly 100% duty cycle if needed, making the device an excellent choice for 48-V battery automotive applications and MHEV/EV systems.

The LMR38020-Q1 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller design size at high operating frequency.

The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in an 8-pin HSOIC PowerPAD integrated circuit package.
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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 LMR38020-Q1 4.2V to 80V, 2A , Automotive, Synchronous SIMPLE SWITCHER Power Converter With 40µA IQ datasheet (Rev. B) PDF | HTML 23/01/2024
Nota sobre la aplicación Reducing Conducted EMI in a Buck Converter for 48 V Automotive Applications PDF | HTML 13/12/2023
Certificado LMR38025QEVM EU Declaration of Conformity (DoC) PDF | HTML 8/11/2023
Información sobre seguridad funcional LMR380x0-Q1 Functional Safety, FIT Rate, Failure Mode Distribution, and Pin FMA PDF | HTML 5/11/2021
Certificado LMR38020QEVM EU RoHS Declaration of Conformity (DoC) 26/10/2021

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

LMR38020QEVM — Módulo de evaluación de convertidor de potencia LMR38020-Q1 SIMPLE SWITCHER® 80 V, 2 A, buck síncron

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Guía del usuario: PDF | HTML
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Modelo de simulación

LMR38020S-Q1 PSpice Transient Model

SNVMC93.ZIP (261 KB) - Modelo PSpice
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Herramienta de cálculo

LMR38020-DESIGN-CALC — Calculadora de diseño de inicio rápido LMR38020

Quickstart Calculator for the LMR38020 and LMR38020-Q1 devices
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Diseño de referencia

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Soporte y capacitación

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