홈 전력 관리 DC/DC 스위칭 레귤레이터 DC/DC 컨트롤러
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DC/DC 스위칭 레귤레이터
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LM851772-Q1

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차량용, 80V, I2C 인터페이스를 지원하는 USB-PD용 4스위치 벅-부스트 컨트롤러

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데이터 시트

LM851772-Q1

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데이터 시트 지금 주문하기

제품 상세 정보

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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* Data sheet LM851772-Q1 80V VIN 4 Switch Buck-Boost Controller With I2C for USB-PD Sourcing datasheet PDF | HTML 2026/06/19

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

평가 보드

LM251772Q1EVM-PD — LM251772-Q1 평가 모듈

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 (...)
사용 설명서: PDF | HTML
TI.com에서 구매할 수 없음
평가 모듈(EVM)용 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
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시작 다운로드 옵션
계산 툴

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.
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주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

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