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LM851772-Q1

プレビュー

自動車用、USB-PD 向け、I2C インターフェイス搭載、80V、4 スイッチ、昇降圧コントローラ

製品詳細

Rating Automotive Topology Buck-Boost Vin (max) (V) 80 Vin (min) (V) 3.5 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 EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.000075 Operating temperature range (°C) -40 to 150
Rating Automotive Topology Buck-Boost Vin (max) (V) 80 Vin (min) (V) 3.5 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 EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.000075 Operating temperature range (°C) -40 to 150
VQFN (RHA) 40 36 mm² 6 x 6
  • Input range from 3.5V to 80V
    • Selectable input voltage operation threshold up to 58.5V in 0.5V steps
  • Dynamical Vo programming using I2C from:
    • 3.3V to 48V in 20mV monotonous steps
    • 3.3V up to 23V in 10mV monotonous steps
  • Peak current regulation control with small voltage transition ripple overall operating modes
  • Shut down quiescent current 3µA
  • Operating quiescent current 75µA
  • 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 undervoltage 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
  • Input range from 3.5V to 80V
    • Selectable input voltage operation threshold up to 58.5V in 0.5V steps
  • Dynamical Vo programming using I2C from:
    • 3.3V to 48V in 20mV monotonous steps
    • 3.3V up to 23V in 10mV monotonous steps
  • Peak current regulation control with small voltage transition ripple overall operating modes
  • Shut down quiescent current 3µA
  • Operating quiescent current 75µA
  • 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 undervoltage 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

The LM851772-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.

LM851772-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 LM851772-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.

LM851772-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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上位の文書 タイプ タイトル フォーマットオプション 最新の英語版をダウンロード 日付
* データシート LM851772-Q1 80V VIN 4 Switch Buck-Boost Controller With I2C for USB-PD Sourcing データシート PDF | HTML 2026年 6月 19日

設計と開発

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評価ボード

LM251772Q1EVM-PD — LM251772-Q1 評価基板

The LM251772Q1EVM-PD demonstrates a flexible high power buck-boost design using the LM251772-Q1. The evaluation module is configured to operate from an input voltage range of 9V to 36V and to produce a regulated 5V to 48V output with up to a 5A load current. The EVM operates with a switching (...)
ユーザー ガイド: PDF | HTML
評価基板 (EVM) 向けの GUI

LM851772-CONFIGURATON-GUI LM851772 GUI for configuration via I2C

Graphical User Interface (GUI) to configure the LM851772 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
サポート対象の製品とハードウェア

サポート対象の製品とハードウェア

開始 ダウンロードオプション
計算ツール

LM851772-QUICKSTART-CALC LM851772 BuckBoost Quickstart Calculator Tool

LM851772 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 LM851772.
サポート対象の製品とハードウェア

サポート対象の製品とハードウェア

パッケージ ピン数 CAD シンボル、フットプリント、および 3D モデル
VQFN (RHA) 40 Ultra Librarian

購入と品質

記載されている情報:
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報:
  • ファブ拠点
  • アセンブリ拠点

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