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LM251772-Q1

現行

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

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產品規格表

LM251772-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) 36 Vin (min) (V) 3.5 Vout (max) (V) 36 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, Synchronous rectification, Tracking, USB C/PD compatible, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.00006 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
Rating Automotive Topology Buck-Boost Vin (max) (V) 36 Vin (min) (V) 3.5 Vout (max) (V) 36 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, Synchronous rectification, Tracking, USB C/PD compatible, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.00006 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
VQFN (RHA) 40 36 mm² 6 x 6
  • Input range from 3.5V to 36V
  • Dynamical Vo programming using I2C from:
    • 3.3V up to in 20mV monotonous steps
    • 1V up to 23V 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
  • 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 microcontroller 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 2200kHz
    • External clock synchronization and clock output
  • Spread spectrum operation selectable
  • Average input or output current sensor
    • Programmable from 0.5A to 7A in 50mA steps
  • I2C programmable with diagnostics
  • Automotive temperature range (Tj = -40°C to 150°C)
  • 40-Pin WSON package with wettable flanks
  • Functional Safety-Capable

  • Create a custom design using the LM251772-Q1 with the WEBENCH® Power Designer
  • Input range from 3.5V to 36V
  • Dynamical Vo programming using I2C from:
    • 3.3V up to in 20mV monotonous steps
    • 1V up to 23V 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
  • 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 microcontroller 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 2200kHz
    • External clock synchronization and clock output
  • Spread spectrum operation selectable
  • Average input or output current sensor
    • Programmable from 0.5A to 7A in 50mA steps
  • I2C programmable with diagnostics
  • Automotive temperature range (Tj = -40°C to 150°C)
  • 40-Pin WSON package with wettable flanks
  • Functional Safety-Capable

  • Create a custom design using the LM251772-Q1 with the WEBENCH® Power Designer

The LM251772-Q1 is a four switch Buck-Boost controller. The device 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 is dynamically programmable using the integrated I2C interface. The configuration range for output voltage and average current meets the USB-PD standard requirements. The integrated DRV pin is used to control an optional disconnect FET if the system is targeted to support dual role port (DRP) requirements.

LM251772-Q1 runs at a fixed switching frequency, which is set using the RT/SYNC pin. The switching frequency remains the same during buck, boost and buck-boost operation. The device maintains small mode transition ripple over all operating modes.

The LM251772-Q1 is a four switch Buck-Boost controller. The device 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 is dynamically programmable using the integrated I2C interface. The configuration range for output voltage and average current meets the USB-PD standard requirements. The integrated DRV pin is used to control an optional disconnect FET if the system is targeted to support dual role port (DRP) requirements.

LM251772-Q1 runs at a fixed switching frequency, which is set using the RT/SYNC pin. The switching frequency remains the same during buck, boost and buck-boost operation. The device maintains small mode transition ripple over all operating modes.
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類型 標題 日期
* Data sheet LM251772-Q1 36V VIN 4 Switch Buck-Boost Controller With I2C for datasheet PDF | HTML 2025年 10月 27日
Functional safety information LM51772-Q1 and LM251772-Q1 Functional Safety FIT Rate and FMD PDF | HTML 2025年 5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
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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

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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
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VQFN (RHA) 40 Ultra Librarian
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