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LM51772-Q1

現行

具有 I2C 介面的車用、55V 4 交換器降壓升壓控制器

立即訂購
產品規格表

LM51772-Q1

現行
產品規格表 立即訂購

產品詳細資料

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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類型 標題 日期
* Data sheet LM51772-Q1 55V 4-Switch Buck-Boost Controller with I2 C interface datasheet (Rev. A) PDF | HTML 2025年 10月 21日
Certificate LM51772Q1EVM-HP EU Declaration of Conformity (DoC) 2025年 10月 21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
Functional safety information LM51772-Q1 and LM251772-Q1 Functional Safety FIT Rate and FMD PDF | HTML 2025年 5月 5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
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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
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN (RHA) 40 Ultra Librarian
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