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LM251772

現行

具有適用 USB-PD 的 I²C 來源的 36V-VIN 四開關降壓升壓控制器

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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

Rating Catalog Topology Buck-Boost Vin (max) (V) 36 Vin (min) (V) 3.5 Vout (max) (V) 48 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) 0 to 70
Rating Catalog Topology Buck-Boost Vin (max) (V) 36 Vin (min) (V) 3.5 Vout (max) (V) 48 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) 0 to 70
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
  • 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
  • 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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技術文件

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類型 標題 日期
* Data sheet LM251772 36V VIN 4-Switch Buck-Boost Controller with I2 C for USB-PD Sourcing datasheet (Rev. A) PDF | HTML 2025年 2月 6日
Application brief Using the DRV1 Pin on LM51772 and LM251772 PDF | HTML 2025年 7月 29日
Certificate LM251772EVM-PD EU Declaration of Conformity (DoC) 2025年 2月 20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

LM251772EVM-PD — LM251772 評估模組

LM251772EVM-PD 展示使用 LM251772 的靈活高功率降壓升壓設計。評估模組 (EVM) 設定為在 9V 至 36V 輸入電壓範圍內運作，並且提供最高 5A 負載電流的穩壓 5V 至 48V 輸出。EVM 在切換頻率為 320kHz 下運作。大多數裝置設定皆可透過跨接器輕鬆調整或設定，例如：操作模式（PSM 或 fPWM）、偏壓電源和外部時鐘同步。
使用指南: PDF | HTML
TI.com 無法提供
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

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
支援產品和硬體

支援產品和硬體

產品
DC/DC controllers
  • LM251772 — 具有適用 USB-PD 的 I²C 來源的 36V-VIN 四開關降壓升壓控制器
  • LM251772-Q1 — 具有適用 USB-PD 的 I2C 介面的車用、36V 4 交換器降壓升壓控制器
硬體開發
開發板
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
DC/DC controllers
  • LM251772 — 具有適用 USB-PD 的 I²C 來源的 36V-VIN 四開關降壓升壓控制器
  • LM251772-Q1 — 具有適用 USB-PD 的 I2C 介面的車用、36V 4 交換器降壓升壓控制器
硬體開發
開發板
下載
參考設計

PMP31344 — Automotive, 12V input, 140W two-port USB Power Delivery with DisplayPort™ ALT mode reference design

This reference design represents an automotive USB Extended Power Range (EPR) system, providing both power and digital communication to two USB Type-C® ports. When connecting a USB-C cable, the TPS26744E-Q1 negotiates a target output voltage and maximum current with the plugged-in device. The (...)
Test report: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN (RHA) 40 Ultra Librarian
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