전력 관리 DC/DC switching regulators DC/DC controllers

LM5126A-Q1

활성

VOUT 추적 기능을 지원하는 차량용, 42V VIN, 2.2MHz 단상 부스트 컨트롤러

제품 상세 정보

Rating Automotive Topology Boost Controller Vin (max) (V) 45 Vin (min) (V) 2.5 Vout (max) (V) 60 Vout (min) (V) 6 Control mode current mode control Features Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Analog current monitor, Automatic Light Load Management, Automotive load dump, Bypass Mode, Chip-enable control pin, Cycle-by-cycle overcurrent protection, External Sync, Fixed PWM Mode, Overcurrent protection with adjustable delay, Power good, Programmable dead time, Spread Spectrum, Tracking EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 99.2 Iq (typ) (A) 0.00025 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
Rating Automotive Topology Boost Controller Vin (max) (V) 45 Vin (min) (V) 2.5 Vout (max) (V) 60 Vout (min) (V) 6 Control mode current mode control Features Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Analog current monitor, Automatic Light Load Management, Automotive load dump, Bypass Mode, Chip-enable control pin, Cycle-by-cycle overcurrent protection, External Sync, Fixed PWM Mode, Overcurrent protection with adjustable delay, Power good, Programmable dead time, Spread Spectrum, Tracking EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 99.2 Iq (typ) (A) 0.00025 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
VQFN (RHB) 32 25 mm² 5 x 5
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: TA = –40°C to +125°C
  • Functional Safety-Capable
  • Input voltage 4.5V to 42V
    • Minimum 2.5V for V(BIAS) ≥4.5V or VOUT ≥6V
  • Output voltage 6V to 60V
    • 2% accuracy, internal feedback resistors
    • Bypass operation for VI > VOUT
    • Dynamic output voltage tracking
      • Digital PWM tracking (DTRK)
      • Analog tracking (ATRK)
    • Overvoltage protection (64V, 50V, 35V, 28.5V)
  • Low shutdown IQ of 2µA
  • Low operating IQ of 1mA
  • 3-phase operation with LM5125A-Q1
  • Switching frequency from 100kHz to 2.2MHz
    • Synchronization to external clock (SYNCIN)
    • Dynamically selectable switching modes (FPWM, diode emulation)
    • Spread spectrum (DRSS)
  • Selectable dead time (14ns to 200ns)
  • Current sense resistor or DCR sensing
  • Average inductor current monitor
  • Average input current limit
    • Programmable current limit
    • Selectable delay time
  • Power good indicator
  • Programmable VI undervoltage lockout (UVLO)
  • Lead-less QFN-32 packable with wettable flanks
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: TA = –40°C to +125°C
  • Functional Safety-Capable
  • Input voltage 4.5V to 42V
    • Minimum 2.5V for V(BIAS) ≥4.5V or VOUT ≥6V
  • Output voltage 6V to 60V
    • 2% accuracy, internal feedback resistors
    • Bypass operation for VI > VOUT
    • Dynamic output voltage tracking
      • Digital PWM tracking (DTRK)
      • Analog tracking (ATRK)
    • Overvoltage protection (64V, 50V, 35V, 28.5V)
  • Low shutdown IQ of 2µA
  • Low operating IQ of 1mA
  • 3-phase operation with LM5125A-Q1
  • Switching frequency from 100kHz to 2.2MHz
    • Synchronization to external clock (SYNCIN)
    • Dynamically selectable switching modes (FPWM, diode emulation)
    • Spread spectrum (DRSS)
  • Selectable dead time (14ns to 200ns)
  • Current sense resistor or DCR sensing
  • Average inductor current monitor
  • Average input current limit
    • Programmable current limit
    • Selectable delay time
  • Power good indicator
  • Programmable VI undervoltage lockout (UVLO)
  • Lead-less QFN-32 packable with wettable flanks

The LM5126A-Q1 is a synchronous boost controller. The device provides a regulated output voltage for lower or equal input voltage also supporting VI to VOUT bypass mode to save power. The device can be stacked in combination with LM5125A-Q1 for 3-phase operation.

Dynamically program VOUT using the analog or digital ATRK/DTRK function. VI is supported down to 2.5V after startup as the internal VCC supply is automatically switched from VBIAS to VOUT for VBIAS < 4.5V. The fixed switching frequency is set between 100kHz and 2.2MHz through a resistor on the RT-pin or the SYNCIN clock. The switching modes FPWM or diode emulation can be changed during operation.

The implemented protections peak current limit, average input current limit, average inductor current monitor, overvoltage and undervoltage protection, and the thermal shutdown protect the device and the application.

The LM5126A-Q1 is a synchronous boost controller. The device provides a regulated output voltage for lower or equal input voltage also supporting VI to VOUT bypass mode to save power. The device can be stacked in combination with LM5125A-Q1 for 3-phase operation.

Dynamically program VOUT using the analog or digital ATRK/DTRK function. VI is supported down to 2.5V after startup as the internal VCC supply is automatically switched from VBIAS to VOUT for VBIAS < 4.5V. The fixed switching frequency is set between 100kHz and 2.2MHz through a resistor on the RT-pin or the SYNCIN clock. The switching modes FPWM or diode emulation can be changed during operation.

The implemented protections peak current limit, average input current limit, average inductor current monitor, overvoltage and undervoltage protection, and the thermal shutdown protect the device and the application.

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기술 자료

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2개 모두 보기
유형 직함 날짜
* Data sheet LM5126A-Q1, Wide-VIN, Single-Phase, Boost Controller with VOUT Tracking datasheet PDF | HTML 2025/11/26
Functional safety information LM5126A-Q1 and LM51261A-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2025/10/24

설계 및 개발

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

평가 보드

LM5126AEVM-BST — LM5126A 평가 모듈

LM5126AEVM-BST 평가 모듈은 LM5126A-Q1의 넓은 입력 전압 동기식 부스트 컨트롤러의 기능과 성능을 보여줍니다. 이 EVM은 구성이 용이하도록 설계되어 사용자가 모듈에서 여러 조건을 평가할 수 있습니다. 표준 구성은 24V, 150W를 출력하도록 설계되었습니다. 출력 전압은 ATRK/DTRK 핀을 통해 동적으로 조정할 수 있습니다.
사용 설명서: PDF | HTML
TI.com에서 구매 불가
계산 툴

LM5126A-BOOST-CALC LM5126A Boost Controller Quick Start Calculator

Design calculator for LM5126A
지원되는 제품 및 하드웨어

지원되는 제품 및 하드웨어

제품
DC/DC controllers
  • LM5126A-Q1 VOUT 추적 기능을 지원하는 차량용, 42V VIN, 2.2MHz 단상 부스트 컨트롤러
하드웨어 개발
평가 보드
패키지 CAD 기호, 풋프린트 및 3D 모델
VQFN (RHB) 32 Ultra Librarian

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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