LM25119
- 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.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 | |
|---|---|---|---|---|---|---|
| * | 데이터 시트 | LM25119 Wide Input Range, Dual Synchronous Buck Controller datasheet (Rev. I) | PDF | HTML | 2018. 1. 29 | ||
| 백서 | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 2019. 4. 10 | ||||
| 백서 | Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) | 2018. 7. 3 | ||||
| 선택 가이드 | Power Management Guide 2018 (Rev. R) | 2018. 6. 25 | ||||
| 기술 문서 | How to use dual buck controllers to power PMICs in automotive applications | PDF | HTML | 2017. 11. 8 | |||
| 아날로그 디자인 학술지 | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016. 7. 21 | ||||
| 백서 | Power Management IC (PMIC) Guide for Automotive (Rev. A) | 2014. 10. 29 | ||||
| 추가 자료 | LM5119 and LM25119 Design tool | 2014. 2. 26 | ||||
| 아날로그 디자인 학술지 | 1Q 2012 Issue Analog Applications Journal | 2012. 1. 31 | ||||
| 아날로그 디자인 학술지 | Benefits of a multiphase buck converter | 2012. 1. 31 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
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. (...)
LM25119 TINA-TI Transient Reference Design (LOAD TRANSIENT)
LM25119 TINA-TI Transient Reference Design (STARTUP)
LM25119-5119QUICK-CALC — LM(2)5119 빠른 시작 계산기
PMP20021 — 24V 입력 전압 2상 동기 벅 컨버터(12V@20A) 레퍼런스 디자인
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| WQFN (RTV) | 32 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.