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LM51772

ACTIVO

Controlador reductor-elevador de cuatro interruptores y VIN amplia de 55 V con interfaz I2C

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LM51772

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Detalles del producto

Rating Catalog Topology Buck-Boost Vin (max) (V) 55 Vin (min) (V) 3.5 Vout (max) (V) 55 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, Spread Spectrum, Synchronous rectification, Tracking, USB C/PD compatible, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.00006 Operating temperature range (°C) -40 to 125
Rating Catalog Topology Buck-Boost Vin (max) (V) 55 Vin (min) (V) 3.5 Vout (max) (V) 55 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, Spread Spectrum, Synchronous rectification, Tracking, USB C/PD compatible, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.00006 Operating temperature range (°C) -40 to 125
VQFN (RHA) 40 36 mm² (6 mm × 6 mm)
  • 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 monotonous steps
    • 1V up to 24V 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
  • 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
  • Spread spectrum operation selectable
  • Average input or output current sensor
    • Programmable from 0.5A (5mV) to 7A (70mV) in 50mA (500µV) steps
    • ISET pin selectable
  • I2C Interface readout of monitoring features

  • Create a custom design using the LM51772 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 monotonous steps
    • 1V up to 24V 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
  • 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
  • Spread spectrum operation selectable
  • Average input or output current sensor
    • Programmable from 0.5A (5mV) to 7A (70mV) in 50mA (500µV) steps
    • ISET pin selectable
  • I2C Interface readout of monitoring features

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

The LM51772 is a four switch buck-boost controller that 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 LM51772 runs at a fixed switching frequency, which can be set via the RT/SYNC pin. The switching frequency remains constant during buck, boost and buck-boost operation in forced PWM. The external compensation pin allows very fast transient response for different applications. The device maintains small mode transition ripple overall operating modes. The output voltage and device configurations can be dynamically programmed via the integrated I2C interface. The integrated and optional high-side current sensor features an accurate output or input current limitation. The average current limit of the LM51772 is also configurable through the I2C interface.

The LM51772 is a four switch buck-boost controller that 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 LM51772 runs at a fixed switching frequency, which can be set via the RT/SYNC pin. The switching frequency remains constant during buck, boost and buck-boost operation in forced PWM. The external compensation pin allows very fast transient response for different applications. The device maintains small mode transition ripple overall operating modes. The output voltage and device configurations can be dynamically programmed via the integrated I2C interface. The integrated and optional high-side current sensor features an accurate output or input current limitation. The average current limit of the LM51772 is also configurable through the I2C interface.
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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 LM51772 55V 4-Switch Buck-Boost Controller with I2 C interface datasheet (Rev. D) PDF | HTML 3/09/2025
Application brief Implementing Reverse Current Operation in the LM51772 Using MODE Function PDF | HTML 20/02/2026
Application brief Using the DRV1 Pin on LM51772 and LM251772 PDF | HTML 29/07/2025
Nota sobre la aplicación Battery or Capacitor Backup Operation with the LM51772 9/07/2025
Application brief Current Monitoring with Positive and Negative Currents on LM5177x Devices (Rev. A) PDF | HTML 25/11/2024
Nota sobre la aplicación Parallel Operation of the Buck-Boost Converters Using LM51772 Buck-Boost Controller PDF | HTML 27/08/2024
Nota sobre la aplicación Layout Optimization of 4-Switch Buck-Boost Converters PDF | HTML 5/09/2023

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
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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
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Herramienta de cálculo

LM51772-QUICKSTART-CALC — LM51772 BuckBoost Quickstart Calculator Tool

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Pedidos y calidad

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Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

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