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LM251772

現行

36V-VIN four-switch buck-boost controller with I²C for USB-PD sourcing

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產品規格表

LM251772

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 3.5 Vin (max) (V) 36 Operating temperature range (°C) 0 to 70 Topology Buck-Boost Rating Catalog Vout (min) (V) 3.3 Vout (max) (V) 48 Features Adjustable UVLO, 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 Iq (typ) (µA) 60 Duty cycle (max) (%) 100
Vin (min) (V) 3.5 Vin (max) (V) 36 Operating temperature range (°C) 0 to 70 Topology Buck-Boost Rating Catalog Vout (min) (V) 3.3 Vout (max) (V) 48 Features Adjustable UVLO, 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 Iq (typ) (µA) 60 Duty cycle (max) (%) 100
VQFN (RHA) 40 36 mm² 6 x 6
  • Input range from 3.5V to 36V
  • 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 over all operating modes
  • 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 PD-controller 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 600kHz
    • External clock synchronization and clock output
  • Average input or output current sensor
    • Programmable from 0.5A to 7A in 50mA steps
    • ISET pin selectable
  • I2C Interface readout of monitoring features
  • Commercial temperature range (Tj = 0°C to 70°C)

  • Create a custom design using the LM251772 with the WEBENCH® Power Designer
  • Input range from 3.5V to 36V
  • 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 over all operating modes
  • 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 PD-controller 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 600kHz
    • External clock synchronization and clock output
  • Average input or output current sensor
    • Programmable from 0.5A to 7A in 50mA steps
    • ISET pin selectable
  • I2C Interface readout of monitoring features
  • Commercial temperature range (Tj = 0°C to 70°C)

  • Create a custom design using the LM251772 with the WEBENCH® Power Designer

The LM251772 is a four switch Buck-Boost controller. It 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 can be dynamically programmed via the integrated I2C interface. The configuration range for output voltage and average current meet the USB-PD standard requirements. The integrated DRV pin can control a disconnect FET to support dual role port (DRP) requirements.

The LM251772 is a four switch Buck-Boost controller. It 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 can be dynamically programmed via the integrated I2C interface. The configuration range for output voltage and average current meet the USB-PD standard requirements. The integrated DRV pin can control a disconnect FET to support dual role port (DRP) requirements.
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類型 標題 日期
* Data sheet LM251772 36V 4-Switch Buck-Boost Controller with I2 C for USB-PD sourcing datasheet PDF | HTML 2024年 10月 10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

The USB2ANY interface adapter is a tool intended to allow a computer to control an evaluation module (EVM) via a USB connection. USB2ANY supports multiple popular protocol interfaces and provides 3.3-V and 5-V power supplies.

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

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
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產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM251772 — 36V-VIN four-switch buck-boost controller with I²C for USB-PD sourcing
啟動 下載選項
計算工具

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.
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)
LM251772 — 36V-VIN four-switch buck-boost controller with I²C for USB-PD sourcing
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VQFN (RHA) 40 Ultra Librarian
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