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AC/DC 和 DC/DC 控制器 (外部 FET)

LM51772

現行

具 I2C 介面的 55-V 大範圍 VIN 四開關降壓升壓控制器

立即訂購
產品規格表

LM51772

現行
產品規格表 立即訂購

產品詳細資料

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 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 60 Duty cycle (max) (%) 100 EMI features Frequency Dithering, Spread Spectrum
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 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 60 Duty cycle (max) (%) 100 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 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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技術文件

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類型 標題 日期
* Data sheet LM51772 55V 4-Switch Buck-Boost Controller with I2 C interface datasheet (Rev. D) PDF | HTML 2025年 9月 3日
Application brief Using the DRV1 Pin on LM51772 and LM251772 PDF | HTML 2025年 7月 29日
Application note Battery or Capacitor Backup Operation with the LM51772 2025年 7月 9日
Application brief Current Monitoring with Positive and Negative Currents on LM5177x Devices (Rev. A) PDF | HTML 2024年 11月 25日
Application note Parallel Operation of the Buck-Boost Converters Using LM51772 Buck-Boost Controller PDF | HTML 2024年 8月 27日
Application note Layout Optimization of 4-Switch Buck-Boost Converters PDF | HTML 2023年 9月 5日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM51772EVM-HP — LM51772 評估模組

LM51772EVM-HP 展示使用 LM51772 wide-VIN 降壓升壓控制器的靈活高功率降壓升壓設計。評估模組設定為在 9V 至 48V 輸入電壓範圍內運作，並且提供最高 5A 負載電流的穩壓 20V 輸出。

使用指南: PDF | HTML
TI.com 無法提供
開發板

USB2ANY — USB2ANY 介面轉接器

USB2ANY 介面轉接器是一種工具，可讓電腦透過 USB 連線控制評估模組 (EVM)。USB2ANY 支援多種常用的通訊協定介面，並提供 3.3V 與 5V 的電源供應器。

使用指南: PDF
TI.com 無法提供
開發模組 (EVM) 的 GUI

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
支援產品和硬體

支援產品和硬體

產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM51772 — 具 I2C 介面的 55-V 大範圍 VIN 四開關降壓升壓控制器 LM51772-Q1 — 具有 I2C 介面的車用、55V 4 交換器降壓升壓控制器
硬體開發
開發板
LM51772EVM-HP — LM51772 評估模組
啟動 下載選項
計算工具

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.
支援產品和硬體

支援產品和硬體

產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM51772 — 具 I2C 介面的 55-V 大範圍 VIN 四開關降壓升壓控制器 LM51772-Q1 — 具有 I2C 介面的車用、55V 4 交換器降壓升壓控制器
硬體開發
開發板
LM51772EVM-HP — LM51772 評估模組
下載
Gerber 檔案

LM51772EVM-HP PCB Layout

SLVME54.ZIP (2229 KB)
下載
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN (RHA) 40 Ultra Librarian
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