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LM851772-Q1

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LM851772-Q1

预发布
立即订购

产品详情

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 & noise 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 & noise 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 mm × 6 mm)
  • 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 (DRV1) 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
    • Peak current capability: 2A
    • Bootstrap over and undervoltage protection
    • Integrated bootstrap diode
  • Fixed frequency independent from operating mode (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching frequency: 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
  • AEC-Q100 qualified for automotive applications
    • Junction temperature: –40°C to 150°C, TJ
  • 40-pin WSON package with wettable flanks
  • Functional Safety-Capable
  • Create a custom design using the LM851772-Q1 with the WEBENCH Power Designer
  • 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 (DRV1) 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
    • Peak current capability: 2A
    • Bootstrap over and undervoltage protection
    • Integrated bootstrap diode
  • Fixed frequency independent from operating mode (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching frequency: 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
  • AEC-Q100 qualified for automotive applications
    • Junction temperature: –40°C to 150°C, TJ
  • 40-pin WSON package with wettable flanks
  • Functional Safety-Capable
  • Create a custom design using the LM851772-Q1 with the WEBENCH Power Designer

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 DRV1 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 DRV1 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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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
功能安全信息 LM851772-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2026-8-17
应用手册 4 开关降压/升压转换器的布局优化 PDF | HTML 英语版 PDF | HTML 2023-9-6

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

LM251772Q1EVM-PD — LM251772-Q1 评估模块

LM251772Q1EVM-PD 演示了一款采用 LM251772-Q1 的大功率灵活降压/升压设计。该评估模块 (EVM) 经过配置，可在 9V 至 36V 的输入电压范围内运行，并提供 5V 至 48V 稳压输出，负载电流高达 5A。该 EVM 的工作开关频率为 320kHz。该器件的大多数设置可通过跳线轻松调整或设置，例如：工作模式（PSM 或 fPWM）、辅助电源和外部时钟同步。
用户指南: PDF | HTML
支持的产品和硬件
有库存
限制：
??asset.out-of-stock-ti_zh_CN??
无货
评估板

LM851772Q1EVM-PD — LM851772-Q1 评估模块

LM851772Q1EVM-PD 演示了一款采用 LM851772-Q1 的大功率灵活降压/升压设计。该评估模块 (EVM) 经过配置，可在 9V 至 60V 的输入电压范围内运行，并提供 5V 至 48V 稳压输出，负载电流高达 5A。该器件的大多数设置可通过跳线轻松调整或设置。

用户指南: PDF | HTML
支持的产品和硬件
有库存
限制：
??asset.out-of-stock-ti_zh_CN??
无货
评估模块 (EVM) 用 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
支持的产品和硬件
计算工具

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.
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RHA) 40 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

订购和质量

推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。

支持和培训

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