Inicio Administración de potencia Controladores CA/CC y CC/CC (FET externo)

LM251772-Q1

ACTIVO

Controlador buck-boost de 36 V, 4 interruptores, para uso automotriz con interfaz I2C para USB-PD

Detalles del producto

Rating Automotive Topology Buck-Boost Vin (max) (V) 36 Vin (min) (V) 3.5 Vout (max) (V) 36 Vout (min) (V) 3.3 Features Adjustable current limit, Dynamic voltage scaling, Enable, Extended power range, Frequency synchronization, I2C, Light load efficiency, Load Disconnect, Power good, 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) 36 Vin (min) (V) 3.5 Vout (max) (V) 36 Vout (min) (V) 3.3 Features Adjustable current limit, Dynamic voltage scaling, Enable, Extended power range, Frequency synchronization, I2C, Light load efficiency, Load Disconnect, Power good, 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 3.5V to 36V
  • Dynamical Vo programming using I2C from:
    • 3.3V up to in 20mV monotonous steps
    • 1V up to 23V in 10mV monotonous steps
  • Peak current regulation control
  • Small voltage transition ripple overall operating modes
  • Dynamic output voltage tracking (digital PWM tracking input, analog tracking input)
    • Via I2C interface programming
  • Shut down quiescent current 3µA
  • Operating quiescent current 60µA
  • Drive (DRV) pin for dual role port power path
    • Push-Pull output for fast pMOS FET control
    • Configurable as charge pump driver stage for nMOS FET
  • Operation mode selection for high efficiency in light load and high load conditions:
    • Power save mode (Single Pulse/µSleep)
    • Automatic conduction mode
  • Integrated high voltage supply LDO
  • Auxiliary high voltage LDO for microcontroller supply
  • 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 2200kHz
    • External clock synchronization and clock output
  • Spread spectrum operation selectable
  • Average input or output current sensor
    • Programmable from 0.5A to 7A in 50mA steps
  • I2C programmable with diagnostics
  • Automotive temperature range (Tj = -40°C to 150°C)
  • 40-Pin WSON package with wettable flanks
  • Functional Safety-Capable
  • Create a custom design using the LM251772-Q1 with the WEBENCH® Power Designer

  • Input range from 3.5V to 36V
  • Dynamical Vo programming using I2C from:
    • 3.3V up to in 20mV monotonous steps
    • 1V up to 23V in 10mV monotonous steps
  • Peak current regulation control
  • Small voltage transition ripple overall operating modes
  • Dynamic output voltage tracking (digital PWM tracking input, analog tracking input)
    • Via I2C interface programming
  • Shut down quiescent current 3µA
  • Operating quiescent current 60µA
  • Drive (DRV) pin for dual role port power path
    • Push-Pull output for fast pMOS FET control
    • Configurable as charge pump driver stage for nMOS FET
  • Operation mode selection for high efficiency in light load and high load conditions:
    • Power save mode (Single Pulse/µSleep)
    • Automatic conduction mode
  • Integrated high voltage supply LDO
  • Auxiliary high voltage LDO for microcontroller supply
  • 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 2200kHz
    • External clock synchronization and clock output
  • Spread spectrum operation selectable
  • Average input or output current sensor
    • Programmable from 0.5A to 7A in 50mA steps
  • I2C programmable with diagnostics
  • Automotive temperature range (Tj = -40°C to 150°C)
  • 40-Pin WSON package with wettable flanks
  • Functional Safety-Capable
  • Create a custom design using the LM251772-Q1 with the WEBENCH® Power Designer

The LM251772-Q1 is a four switch Buck-Boost controller. The device provides a regulated output voltage if the input voltage is higher, equal or lower than the adjusted output voltage. In power save mode the device supports very high efficiency over the complete operation range of the output. The output voltage and average current is dynamically programmable using the integrated I2C interface. The configuration range for output voltage and average current meets the USB-PD standard requirements. The integrated DRV pin is used to control an optional disconnect FET if the system is targeted to support dual role port (DRP) requirements.

LM251772-Q1 runs at a fixed switching frequency, which is set using the RT/SYNC pin. The switching frequency remains the same during buck, boost and buck-boost operation. The device maintains small mode transition ripple over all operating modes.

The LM251772-Q1 is a four switch Buck-Boost controller. The device provides a regulated output voltage if the input voltage is higher, equal or lower than the adjusted output voltage. In power save mode the device supports very high efficiency over the complete operation range of the output. The output voltage and average current is dynamically programmable using the integrated I2C interface. The configuration range for output voltage and average current meets the USB-PD standard requirements. The integrated DRV pin is used to control an optional disconnect FET if the system is targeted to support dual role port (DRP) requirements.

LM251772-Q1 runs at a fixed switching frequency, which is set using the RT/SYNC pin. The switching frequency remains the same during buck, boost and buck-boost operation. The device maintains small mode transition ripple over all operating modes.

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Documentación técnica

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* Data sheet LM251772-Q1 36V VIN 4 Switch Buck-Boost Controller With I2C for datasheet PDF | HTML 27 oct 2025
Functional safety information LM51772-Q1 and LM251772-Q1 Functional Safety FIT Rate and FMD PDF | HTML 05 may 2025

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

LM251772EVM-PD — Módulo de evaluación LM251772

El LM251772EVM-PD demuestra un diseño flexible buck-boost de alta potencia que utiliza el LM251772. El módulo de evaluación (EVM) está configurado para funcionar con un rango de tensión de entrada de 9 V a 36 V y producir una salida regulada de 5 V a 48 V con hasta 5 A de corriente de carga. El (...)
Guía del usuario: PDF | HTML
GUI para el módulo de evaluación (EVM)

LM251772-CONFIGURATON-GUI LM251772 GUI for configuration via I2C

Graphical User Interface (GUI) to configure the LM251772 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)
LM251772 Controlador buck-boost de cuatro interruptores 36V-VIN con I²C para suministro USB-PD LM251772-Q1 Controlador buck-boost de 36 V, 4 interruptores, para uso automotriz con interfaz I2C para USB-PD
Desarrollo de hardware
Placa de evaluación
LM251772EVM-PD Módulo de evaluación LM251772
Iniciar Opciones de descarga
Herramienta de cálculo

LM251772-QUICKSTART-CALC LM251772 BuckBoost Quickstart Calculator Tool

LM251772 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 LM2521772.
Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores CA/CC y CC/CC (FET externo)
LM251772 Controlador buck-boost de cuatro interruptores 36V-VIN con I²C para suministro USB-PD LM251772-Q1 Controlador buck-boost de 36 V, 4 interruptores, para uso automotriz con interfaz I2C para USB-PD
Desarrollo de hardware
Placa de evaluación
LM251772EVM-PD Módulo de evaluación LM251772
Diseños de referencia

PMP31344 — Dño. de ref. autom. con ent. de 12 V y Pow. Del. USB de 2 pto. de 140 W con modo alter. DisplayPort™

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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

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