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

LM25119

활성

4.5~42V 넓은 입력 전압 범위, 전류 모드 듀얼 동기 벅 컨트롤러

지금 주문
데이터시트

LM25119

활성
데이터시트 지금 주문

제품 상세 정보

Vin (min) (V) 4.5 Vin (max) (V) 42 Iout (max) (A) 40 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 41.3 Iq (typ) (A) 0.006 Duty cycle (max) (%) 98
Vin (min) (V) 4.5 Vin (max) (V) 42 Iout (max) (A) 40 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Catalog Vout (min) (V) 0.8 Vout (max) (V) 41.3 Iq (typ) (A) 0.006 Duty cycle (max) (%) 98
WQFN (RTV) 32 25 mm² 5 x 5
  • Emulated Peak Current Mode Control
  • Wide Operating Range (4.5 V to 42 V)
  • Easily Configurable for Dual Outputs or Interleaved Single Output
  • Robust 3.3-A Peak Gate Drive
  • Switching Frequency Programmable to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output From 0.8 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Hiccup Mode Overload Protection
  • Programmable Soft-Start
  • Programmable Line Undervoltage Lockout
  • Automatic Switchover to External Bias Supply
  • Channel2 Enable Logic Input
  • Thermal Shutdown
  • Leadless 32-Pin WQFN Package
  • Emulated Peak Current Mode Control
  • Wide Operating Range (4.5 V to 42 V)
  • Easily Configurable for Dual Outputs or Interleaved Single Output
  • Robust 3.3-A Peak Gate Drive
  • Switching Frequency Programmable to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output From 0.8 V
  • Precision 1.5% Voltage Reference
  • Programmable Current Limit
  • Hiccup Mode Overload Protection
  • Programmable Soft-Start
  • Programmable Line Undervoltage Lockout
  • Automatic Switchover to External Bias Supply
  • Channel2 Enable Logic Input
  • Thermal Shutdown
  • Leadless 32-Pin WQFN Package

The LM25119 device is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 kHz to 750 kHz. The LM25119 device drives external high-side and low-side N-channel MOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation.

The LM25119 device is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 kHz to 750 kHz. The LM25119 device drives external high-side and low-side N-channel MOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation.
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기술 문서

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모두 보기15
유형 직함 날짜
* Data sheet LM25119 Wide Input Range, Dual Synchronous Buck Controller datasheet (Rev. I) PDF | HTML 2018/01/29
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019/04/10
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 2018/07/03
Selection guide Power Management Guide 2018 (Rev. R) 2018/06/25
Technical article How to use dual buck controllers to power PMICs in automotive applications PDF | HTML 2017/11/08
More literature LM5119, LM25119 Quick Start Calculator (Rev. B) 2017/02/03
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016/07/21
White paper Power Management IC (PMIC) Guide for Automotive (Rev. A) 2014/10/29
More literature LM5119 and LM25119 Design tool 2014/02/26
User guide AN-2065 LM5119 Evaluation Board (Rev. B) 2013/04/24
User guide AN-2066 LM25119 Evaluation Board (Rev. B) 2013/04/24
User guide AN-2103 LM5117 Evaluation Board (Rev. B) 2013/04/24
User guide AN-2112 LM25117 Evaluation Board (Rev. B) 2013/04/24
Analog Design Journal 1Q 2012 Issue Analog Applications Journal 2012/01/31
Analog Design Journal Benefits of a multiphase buck converter 2012/01/31

설계 및 개발

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

평가 보드

LM25119EVAL — LM25119 넓은 Vin 듀얼 동기식 벅 컨트롤러용 평가 보드

The LM25119EVAL evaluation board provides the design engineer with a fully functional dual output buck converter, employing the LM25119 Dual Emulated Current Mode Synchronous Buck Controller. The evaluation board is designed to provide both 3.3V and 1.8V outputs over an input range of 6.0V to 36V. (...)

사용 설명서: PDF
TI.com에서 구매할 수 없습니다
시뮬레이션 모델

LM25119 PSpice Transient Model

SNVM384.ZIP (227 KB) - PSpice Model
다운로드
시뮬레이션 모델

LM25119 TINA-TI Transient Reference Design (LOAD TRANSIENT)

SNVM484.TSC (154 KB) - TINA-TI Reference Design
다운로드
시뮬레이션 모델

LM25119 TINA-TI Transient Reference Design (STARTUP)

SNVM483.TSC (224 KB) - TINA-TI Reference Design
다운로드
시뮬레이션 모델

LM25119 TINA-TI Transient Spice Model

SNVM482.ZIP (26 KB) - TINA-TI Spice Model
다운로드
시뮬레이션 모델

LM25119 Unencrypted PSpice Transient Model

SNVM865.ZIP (4 KB) - PSpice Model
다운로드
계산 툴

LM25119-5119QUICK-CALC — LM(2)5119 빠른 시작 계산기

다운로드
레퍼런스 디자인

PMP10664 — 산업용 애플리케이션용 35W 듀얼 출력 벅 레퍼런스 설계

The PMP10664 reference design is a 35W dual-output synchronous buck converter using the LM25119 controller IC.  The design accepts an input voltage of 9.8Vin to 15.1Vin, provides one output of 3.3V capable of supplying 6.5A of current and one output of 3.3V capable of supplying 4A of (...)
Test report: PDF
회로도: PDF
레퍼런스 디자인

PMP20021 — 24V 입력 전압 2상 동기 벅 컨버터(12V@20A) 레퍼런스 디자인

This two phase synchronous buck converter allows smaller components with better distributed thermal performance than an equivalent single phase design. It achieves high efficiency, uses small inductors and easily fits in a small PCB area of 70mm x 70mm.
Test report: PDF
회로도: PDF
레퍼런스 디자인

PMP9700 — 레퍼런스 디자인 - 300W를 제공하는 고효율 2상 동기 벅

This two-phase synchronous buck operates from 24VDC and supplies an output of 15V@20A. Operation at 300KHz (per phase) delivers small size and greater than 96% efficiency.
Test report: PDF
회로도: PDF
레퍼런스 디자인

PMP7877 — Xilinx® Zynq®-7000용 전원 레퍼런스 디자인

The PMP7877 reference design provides all the rails necessary to power a Xilinx® Zynq®-7000 series SoC.  It operates from an input voltage range of 10.8Vin to 13.2Vin and has seven regulated outputs: 1Vout @ 5A, 1.8Vout @ 2.5A, 1.5Vout @ 6A, 3.3Vout @ 5A, 3.3Vout @ 5A, 5Vout @ 2A, and (...)
Test report: PDF
회로도: PDF
패키지 핀 다운로드
WQFN (RTV) 32 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

지원 및 교육

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