홈 전원 관리 AC/DC & DC/DC controllers (external FET)
홈
전원 관리
AC/DC & DC/DC controllers (external FET)

LM5145

활성

광범위한 입력 전압과 듀티 사이클 범위를 지원하는 75V 동기 벅 컨트롤러

지금 주문
데이터시트

LM5145

활성
데이터시트 지금 주문

제품 상세 정보

Vin (min) (V) 6 Vin (max) (V) 75 Iout (max) (A) 30 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 60 Iq (typ) (A) 0.0015 Duty cycle (max) (%) 99
Vin (min) (V) 6 Vin (max) (V) 75 Iout (max) (A) 30 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 60 Iq (typ) (A) 0.0015 Duty cycle (max) (%) 99
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 6 V to 75 V
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Optimized for CISPR 32 requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC In and SYNC Out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
    • Low-side soft start for prebiased start-up
  • Fast line and load transient response
    • Voltage-mode control with line feedforward
    • High gain-bandwidth error amplifier
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5145 with WEBENCH Power Designer
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 6 V to 75 V
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Optimized for CISPR 32 requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC In and SYNC Out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
    • Low-side soft start for prebiased start-up
  • Fast line and load transient response
    • Voltage-mode control with line feedforward
    • High gain-bandwidth error amplifier
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5145 with WEBENCH Power Designer

The LM5145 75-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5145 continues to operate during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance industrial control, robotic, datacom, and RF power applications.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.

The LM5145 75-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5145 continues to operate during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance industrial control, robotic, datacom, and RF power applications.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.
open-in-new 기타 AC/DC & DC/DC controllers (external FET) 찾기
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관심 가지실만한 유사 제품

open-in-new 대안 비교
비교 대상 장치와 동일한 기능을 지원하는 핀 대 핀
LM5146 활성 넓은 듀티 사이클 범위를 가진 100V 동기 벅 DC-DC 컨트롤러 Pin-to-pin higher Vin capable

기술 문서

star =TI에서 선정한 이 제품의 인기 문서
검색된 결과가 없습니다. 검색어를 지우고 다시 시도하십시오.
모두 보기24
유형 직함 날짜
* Data sheet LM5145 75-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range datasheet (Rev. B) PDF | HTML 2020/11/19
Analog Design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML 2023/08/29
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 2021/04/21
Application note An Accurate Approach for Calculating the Efficiency of a Synchronous Buck Conver 2020/07/02
Application note Wide-Vin Battery-Charger Using SMBus MSP430 MCUs and bq Fuel Gauges (Rev. B) PDF | HTML 2019/07/12
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019/04/10
Application brief IC Package Features Lead to Higher Reliability in Automotive Systems 2019/02/20
Application brief Improving RF Power Amplifier Efficiency in 5G Radio Systems 2018/09/05
EVM User's guide LM5146-Q1EVM User's Guide 2018/08/10
Technical article A review of EMI standards, part 2 – radiated emissions PDF | HTML 2018/07/05
Technical article A review of EMI standards, part 1 – conducted emissions PDF | HTML 2018/06/28
White paper An overview of radiated EMI specifications for power supplies 2018/06/05
Selection guide DC/DC Buck Controller Solutions Selection Guide 2018/02/06
White paper An overview of conducted EMI specifications for power supplies 2018/02/01
Application brief Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout 2017/11/13
Technical article How to design a simple two-phase current-sharing synchronous buck regulator using PDF | HTML 2017/11/03
Technical article Synchronous buck controller solutions support wide VIN performance and flexibility PDF | HTML 2017/06/29
EVM User's guide LM5145EVM-HD-20A High Density Evaluation Module (Rev. A) 2017/06/07
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016/07/21
Technical article High Density PCB Layout of DC/DC Converters, Part 2 PDF | HTML 2015/09/16
Technical article High Density PCB Layout of DC/DC Converters, Part 1 PDF | HTML 2015/09/12
Application note Power Topology - Buck Converter 2010/08/16
Application note Load-Sharing TPS40050 Modules Using the UCC39002 Load-Share Controller 2004/04/13
Application note Seminar 900 Topic 2 - Snubber Circuits: Theory, Design and Application 2001/02/15

설계 및 개발

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

평가 보드

LM5145EVM-HD-20A — LM5145 넓은 VIN 동기 벅 컨트롤러 고밀도 평가 모듈

The LM5145EVM-HD-20A high density evaluation module (EVM) is designed to showcase the performance of the LM5145 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a wide (...)
사용 설명서: PDF
TI.com에서 구매할 수 없습니다
시뮬레이션 모델

LM5145 PSpice Unencrypted Transient Model (Rev. C)

SNVMB65C.ZIP (150 KB) - PSpice Model
다운로드
계산 툴

LM5145DESIGN-CALC — LM5145 Quickstart Design Tool

Welcome to the LM5145 Quickstart Design Tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the LM5145 75V synchronous buck controller. As such, the user can expeditiously arrive at an optimized design to meet the (...)

지원되는 제품 및 하드웨어

지원되는 제품 및 하드웨어

제품
AC/DC & DC/DC controllers (external FET)
LM5145 — 광범위한 입력 전압과 듀티 사이클 범위를 지원하는 75V 동기 벅 컨트롤러 LM5145-Q1 — 넓은 듀티 사이클 범위를 가진 오토모티브 75V 동기 벅 DC-DC 컨트롤러
하드웨어 개발
평가 보드
LM5145EVM-HD-20A — LM5145 넓은 VIN 동기 벅 컨트롤러 고밀도 평가 모듈
소프트웨어
계산 툴
LM5145DESIGN-CALC — LM5145 동기 벅 컨트롤러 설계 툴
다운로드
계산 툴

SNVR510 — LM5145 Inverting Buck-Boost Quickstart Calculator

지원되는 제품 및 하드웨어

지원되는 제품 및 하드웨어

제품
AC/DC & DC/DC controllers (external FET)
LM5145 — 광범위한 입력 전압과 듀티 사이클 범위를 지원하는 75V 동기 벅 컨트롤러
다운로드
PCB 레이아웃

LM5146-Q1-EVM12V PCB Layout Files

SNVR473.ZIP (7838 KB)
다운로드
PCB 레이아웃

LM5145EVM-HD-20A PCB Layout Files

SNVR500.ZIP (1493 KB)
다운로드
레퍼런스 디자인

PMP20178 — 텔레콤용 57W 출력 동기 벅 컨버터 레퍼런스 설계

PMP20178 is a voltage-mode synchronous buck converter reference design rated for 5.2V output at 11A from an input voltage of 15V to 60V. This design uses the LM5145 synchronous buck controller at a switching frequency of 200 kHz. Features include power good, synchronization and trim functions.
Test report: PDF
회로도: PDF
패키지 핀 다운로드
VQFN (RGY) 20 옵션 보기
TI의 평가 항목에 대한 표준 약관이 적용됩니다.

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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