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Controladores CA/CC y CC/CC (FET externo)
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LM51772-Q1

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Controlador buck-boost de 55 V y 4 interruptores para uso automotriz con interfaz I2C

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LM51772-Q1

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Detalles del producto

Rating Automotive Topology Buck-Boost Vin (max) (V) 55 Vin (min) (V) 0 Vout (max) (V) 55 Vout (min) (V) 1 Features 1% accuracy, AEC Q100, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Advanced power saving, Dynamic voltage scaling, Enable, Extended power range, Frequency synchronization, I2C, Light-load efficiency, Load Disconnect, Power good, Spread Spectrum, Synchronous rectification, Tracking, USB C/PD compatible, UVLO adjustable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 60 Duty cycle (max) (%) 100 TI functional safety category Functional Safety-Capable EMI features Frequency Dithering, Spread Spectrum
Rating Automotive Topology Buck-Boost Vin (max) (V) 55 Vin (min) (V) 0 Vout (max) (V) 55 Vout (min) (V) 1 Features 1% accuracy, AEC Q100, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Advanced power saving, Dynamic voltage scaling, Enable, Extended power range, Frequency synchronization, I2C, Light-load efficiency, Load Disconnect, Power good, Spread Spectrum, Synchronous rectification, Tracking, USB C/PD compatible, UVLO adjustable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 60 Duty cycle (max) (%) 100 TI functional safety category Functional Safety-Capable EMI features Frequency Dithering, Spread Spectrum
VQFN (RHA) 40 36 mm² 6 x 6
  • Input range from 0V (V(BIAS) ≥ 3.5V) to 55V
  • Output voltage 1V to 55V
  • Dynamical Vo programming via I2C from:
    • 3.3V up to 48V in 20mV steps
    • 1V up to 24V in 10mV steps
  • Peak current regulation control
  • Small voltage transition ripple overall operating modes
  • Shut down quiescent current 3µA
  • Operating quiescent current 60µA
  • DRV pin for external FET control
  • Operation mode selection for high efficiency in light load and high load conditions:
    • Power save mode (Single Pulse/µSleep)
    • Automatic/programmable conduction mode
  • Integrated high voltage supply LDO
  • Auxiliary high voltage LDO/reference
  • Integrated full-bridge gate drive
    • 2A peak current capability
    • Bootstrap over and under-voltage protection
    • Integrated boot-strap diode
  • Fixed frequency independent from operating mode (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching frequency from 100kHz to 2.2MHz
    • External clock synchronization and clock output
  • Average input or output current sensor
    • Programmable from 0.5A (5mV) to 7A (70mV) in 50mA (500µV) steps
    • ISET pin selectable
  • I2C programmable with diagnostics
    • I2C usage is optional, alternative feature selection via CFG-Pins
  • Automotive temperature range (Tj = -40°C to 150°C)
  • 40-Pin WSON package with wettable flanks

  • Create a custom design using the LM51772-Q1 with the WEBENCH® Power Designer
  • Input range from 0V (V(BIAS) ≥ 3.5V) to 55V
  • Output voltage 1V to 55V
  • Dynamical Vo programming via I2C from:
    • 3.3V up to 48V in 20mV steps
    • 1V up to 24V in 10mV steps
  • Peak current regulation control
  • Small voltage transition ripple overall operating modes
  • Shut down quiescent current 3µA
  • Operating quiescent current 60µA
  • DRV pin for external FET control
  • Operation mode selection for high efficiency in light load and high load conditions:
    • Power save mode (Single Pulse/µSleep)
    • Automatic/programmable conduction mode
  • Integrated high voltage supply LDO
  • Auxiliary high voltage LDO/reference
  • Integrated full-bridge gate drive
    • 2A peak current capability
    • Bootstrap over and under-voltage protection
    • Integrated boot-strap diode
  • Fixed frequency independent from operating mode (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching frequency from 100kHz to 2.2MHz
    • External clock synchronization and clock output
  • Average input or output current sensor
    • Programmable from 0.5A (5mV) to 7A (70mV) in 50mA (500µV) steps
    • ISET pin selectable
  • I2C programmable with diagnostics
    • I2C usage is optional, alternative feature selection via CFG-Pins
  • Automotive temperature range (Tj = -40°C to 150°C)
  • 40-Pin WSON package with wettable flanks

  • Create a custom design using the LM51772-Q1 with the WEBENCH® Power Designer

The LM51772-Q1 is a four switch Buck-Boost controller with optional I2C control. The device provides a regulated output voltage if the input voltage is higher, equal or lower than the adjusted output voltage. In power safe mode the device supports very high efficiency at light and high load conditions and features a programmable pass-through function(PCM). The second over-voltage protection is user programmable and can be used to limit the voltage during moisture (test) conditions. Numerous monitoring features like a thermal warning help to maintain the system housekeeping.

LM51772-Q1 runs at a fixed switching frequency, which can be set via the RT/SYNC pin. The switching frequency remains the same during buck, boost and buck-boost operation. The device maintains small mode transition ripple overall operating modes. The integrated and optional high-side current sensor features an accurate output or input current limitation. The average current limit of the LM51772-Q1 is also configurable through the I2C interface.

The LM51772-Q1 is a four switch Buck-Boost controller with optional I2C control. The device provides a regulated output voltage if the input voltage is higher, equal or lower than the adjusted output voltage. In power safe mode the device supports very high efficiency at light and high load conditions and features a programmable pass-through function(PCM). The second over-voltage protection is user programmable and can be used to limit the voltage during moisture (test) conditions. Numerous monitoring features like a thermal warning help to maintain the system housekeeping.

LM51772-Q1 runs at a fixed switching frequency, which can be set via the RT/SYNC pin. The switching frequency remains the same during buck, boost and buck-boost operation. The device maintains small mode transition ripple overall operating modes. The integrated and optional high-side current sensor features an accurate output or input current limitation. The average current limit of the LM51772-Q1 is also configurable through the I2C interface.
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Documentación técnica

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* Data sheet LM51772-Q1 55V 4-Switch Buck-Boost Controller with I2 C interface datasheet (Rev. A) PDF | HTML 21 oct 2025
Certificate LM51772Q1EVM-HP EU Declaration of Conformity (DoC) 21 oct 2025
Application brief Using the DRV1 Pin on LM51772 and LM251772 PDF | HTML 29 jul 2025
Application note Battery or Capacitor Backup Operation with the LM51772 09 jul 2025
Functional safety information LM51772-Q1 and LM251772-Q1 Functional Safety FIT Rate and FMD PDF | HTML 05 may 2025
Application note Layout Optimization of 4-Switch Buck-Boost Converters PDF | HTML 05 sep 2023

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

LM51772EVM-HP — Módulo de evaluación LM51772

‌El LM51772EVM-HP demuestra un diseño flexible reductor-elevador de alta alimentación que utiliza el controlador reductor-elevador LM51772 de VIN amplia. El módulo de evaluación está configurado para funcionar con un rango de tensión de entrada de 9 V a 48 V y proporciona una salida regulada de (...)

Guía del usuario: PDF | HTML
No disponible en TI.com
GUI para el módulo de evaluación (EVM)

LM51772-CONFIGURATON-GUI — LM51772 GUI for configuration via I2C

Graphical User Interface (GUI) to configure the LM51772 via I2C. You can use the Launch button for using the GUI online via a browser or one of the download files to operate the GUI offline
Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores CA/CC y CC/CC (FET externo)
LM51772 — Controlador reductor-elevador de cuatro interruptores y VIN amplia de 55 V con interfaz I2C LM51772-Q1 — Controlador buck-boost de 55 V y 4 interruptores para uso automotriz con interfaz I2C
Desarrollo de hardware
Placa de evaluación
LM51772EVM-HP — Módulo de evaluación LM51772
Iniciar Opciones de descarga
Herramienta de cálculo

LM51772-QUICKSTART-CALC — LM51772 BuckBoost Quickstart Calculator Tool

LM51772 BuckBoost Quickstart Calculator Tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck-boost converter based on the LM51772.
Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores CA/CC y CC/CC (FET externo)
LM51772 — Controlador reductor-elevador de cuatro interruptores y VIN amplia de 55 V con interfaz I2C LM51772-Q1 — Controlador buck-boost de 55 V y 4 interruptores para uso automotriz con interfaz I2C
Desarrollo de hardware
Placa de evaluación
LM51772EVM-HP — Módulo de evaluación LM51772
Descargar
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (RHA) 40 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

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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Soporte y capacitación

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