전원 관리 AC/DC 및 DC/DC 컨트롤러(외장 FET)

LM5149

활성

초저 IQ 및 통합된 활성 EMI 필터가 있는 80V 동기식 벅 DC/DC 컨트롤러

제품 상세 정보

Vin (min) (V) 3.5 Vin (max) (V) 80 Iout (max) (A) 20 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 55 Features Adjustable current limit, Enable, Frequency synchronization, Load Disconnect, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 9.5 Duty cycle (max) (%) 99 Number of phases 2
Vin (min) (V) 3.5 Vin (max) (V) 80 Iout (max) (A) 20 Operating temperature range (°C) -40 to 150 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 55 Features Adjustable current limit, Enable, Frequency synchronization, Load Disconnect, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable Iq (typ) (µA) 9.5 Duty cycle (max) (%) 99 Number of phases 2
VQFN (RGY) 24 19.25 mm² 5.5 x 3.5
  • Functional Safety-Capable
  • Two integrated EMI mitigation mechanisms
    • Active EMI Filter for enhanced EMI performance at lower frequencies
    • Selectable dual random spread spectrum (DRSS) for enhanced EMI performance across low and high-frequency bands
    • EMI reduced by an average of 25 dBµV
    • Reduces the external differential-mode input filter size by 50% and lowers systems cost
    • Optimized for CISPR 32 Class B requirements
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 80 V
    • 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable output from 0.8 V to 55 V
    • 150°C maximum junction temperature
    • Shutdown mode current: 2.3 µA
    • No-load sleep current: 9.5 µA
    • Stackable up to two phases
    • Advanced dropout with frequency foldback
  • Switching frequency from 100 kHz to 2.2 MHz
    • SYNC in and SYNC out capability
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • ENABLE and PGOOD functions
    • VCC, VDDA, and gate-drive UVLO protection
    • Internal or external loop compensation
    • Thermal shutdown protection with hysteresis
  • Create a custom design using the LM5149 with WEBENCH Power Designer
  • Functional Safety-Capable
  • Two integrated EMI mitigation mechanisms
    • Active EMI Filter for enhanced EMI performance at lower frequencies
    • Selectable dual random spread spectrum (DRSS) for enhanced EMI performance across low and high-frequency bands
    • EMI reduced by an average of 25 dBµV
    • Reduces the external differential-mode input filter size by 50% and lowers systems cost
    • Optimized for CISPR 32 Class B requirements
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5 V to 80 V
    • 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable output from 0.8 V to 55 V
    • 150°C maximum junction temperature
    • Shutdown mode current: 2.3 µA
    • No-load sleep current: 9.5 µA
    • Stackable up to two phases
    • Advanced dropout with frequency foldback
  • Switching frequency from 100 kHz to 2.2 MHz
    • SYNC in and SYNC out capability
  • Inherent protection features for robust design
    • Internal hiccup-mode overcurrent protection
    • ENABLE and PGOOD functions
    • VCC, VDDA, and gate-drive UVLO protection
    • Internal or external loop compensation
    • Thermal shutdown protection with hysteresis
  • Create a custom design using the LM5149 with WEBENCH Power Designer

The LM5149 is a 80-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM5149 can be set up in interleaved dual-phase mode with accurate current sharing for high-current applications. The device can operate with VIN as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM5149 has two unique EMI reduction features: active EMI filter and dual random spread spectrum (DRSS). The active EMI filter senses any noise or ripple voltage on the DC input bus and injects an out-of-phase cancellation signal to reduce the disturbance. DRSS combines low-frequency triangular and high-frequency randomized modulations to mitigate EMI across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

Additional features of the LM5149 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator and bootstrap diode, internal 3-ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM5149- controller comes in a 3.5-mm × 5.5-mm thermally enhanced, 24-pin VQFN package with an exposed pad to aid in thermal dissapation.

The LM5149 is a 80-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM5149 can be set up in interleaved dual-phase mode with accurate current sharing for high-current applications. The device can operate with VIN as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM5149 has two unique EMI reduction features: active EMI filter and dual random spread spectrum (DRSS). The active EMI filter senses any noise or ripple voltage on the DC input bus and injects an out-of-phase cancellation signal to reduce the disturbance. DRSS combines low-frequency triangular and high-frequency randomized modulations to mitigate EMI across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

Additional features of the LM5149 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator and bootstrap diode, internal 3-ms soft-start time, and thermal shutdown protection with automatic recovery.

The LM5149- controller comes in a 3.5-mm × 5.5-mm thermally enhanced, 24-pin VQFN package with an exposed pad to aid in thermal dissapation.

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기술 자료

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5개 모두 보기
유형 직함 날짜
* Data sheet LM5149 80-V, Synchronous, Buck, DC/DC Controller with Ultra-Low IQ and Integrated Active EMI Filter datasheet (Rev. A) PDF | HTML 2023/01/24
Application note Controller to Converter – Design Considerations for 24V and 48V Systems PDF | HTML 2024/10/02
Application note How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 2023/08/16
Functional safety information LM5149 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2022/12/16
User guide LM25149-Q1 EVM User's Guide (Rev. A) PDF | HTML 2022/04/29

설계 및 개발

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평가 보드

LM25149-Q1EVM-2100 — LM25149-Q1 5.5V~36V 저 IQ, 동기 벅 DC/DC 컨트롤러 평가 모듈

LM25149-Q1EVM-2100 고밀도 평가 모듈(EVM)은 LM25149-Q1 고성능 차량용 동기 벅 DC/DC 벅 컨트롤러의 성능을 보여주도록 설계되었습니다. EVM은 5.5 V~36V의 넓은 입력 전압 범위에서 작동하여 1% 이상의 설정값 정확도와 최대 8A 출력 전류를 가진 고정 5V 출력을 제공합니다. LM25149-Q1은 고급 EMI 성능과 초저 IQ를 제공합니다. 고장 상태에서의 레귤레이터 기능에는 저전압 잠금, 내부 소프트 시작, 히컵 모드 과전류 보호 및 열 셧다운이 포함됩니다. 오픈 드레인 PGOOD 표시기 및 (...)
사용 설명서: PDF | HTML
TI.com에서 구매 불가
평가 보드

LM5149-Q1EVM-400 — LM5149-Q1 평가 모듈, 72V, 저 IQ, 동기 벅 DC/DC 컨트롤러, 능동 EMI 필터 포함

LM5149-Q1EVM-400 고밀도 평가 모듈(EVM)은 LM5149-Q1 고성능 차량용 동기 벅 DC/DC 벅 컨트롤러의 성능을 보여주도록 설계되었습니다. EVM은 15 V~72V의 넓은 입력 전압 범위에서 작동하여 1% 이상의 설정값 정확도와 최대 8A 출력 전류를 가진 고정 12V 출력을 제공합니다. LM5149-Q1은 고급 EMI 성능, 초저 IQ, 고장 상태 중 레귤레이터 보호를 지원하는 보호 기능을 제공합니다. 여기에는 부족 전압 잠금, 내부 소프트 시작, 히컵 모드 과전류 보호 및 열 셧다운 등이 포함됩니다. 또한 (...)

사용 설명서: PDF | HTML
TI.com에서 구매 불가
시뮬레이션 모델

LM5149-Q1 PSPICE Transient Model

SNVMCB8.ZIP (87 KB) - PSpice Model
계산 툴

LM5149-LM25149DESIGN-CALC LM25149 Design Calculation Tool

Welcome to the quickstart design tool for the LM5149, LM5149-Q1 and LM25149, LM25149-Q1. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the above controller family. As such, the user can expeditiously arrive at an optimized (...)
지원되는 제품 및 하드웨어

지원되는 제품 및 하드웨어

제품
AC/DC 및 DC/DC 컨트롤러(외장 FET)
LM25149 초저 IQ 및 통합된 활성 EMI 필터가 있는 42V 동기식 벅 DC/DC 컨트롤러 LM25149-Q1 42V 차량용 동기식 벅 DC/DC 컨트롤러, 초저 IQ 및 통합 액티브 EMI 필터 지원 LM5149 초저 IQ 및 통합된 활성 EMI 필터가 있는 80V 동기식 벅 DC/DC 컨트롤러 LM5149-Q1 80V 차량용 동기식 벅 DC/DC 컨트롤러, 초저 IQ 및 통합 액티브 EMI 필터 지원
하드웨어 개발
평가 보드
LM25149-Q1EVM-2100 LM25149-Q1 5.5V~36V 저 IQ, 동기 벅 DC/DC 컨트롤러 평가 모듈
PCB 레이아웃

LM25149-Q1EVM-2100 PCB Layout Files

SNVR501.ZIP (1990 KB)
패키지 CAD 기호, 풋프린트 및 3D 모델
VQFN (RGY) 24 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

지원 및 교육

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