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LM25141-Q1
- AEC-Q100 Qualified for Automotive Applications:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C4B
- VIN 3.8 V to 42 V (47 V Absolute Maximum)
- Output: Fixed 3.3 V, 5 V, or Adjustable
From
1.5 V to 15 V With ±0.8% Accuracy - Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
- Meets CISPR 25 / EN 55025 EMI
Standards
- Fixed 2.2-MHz or 440-kHz Switching Frequency With ±5% Accuracy
- High-Side and Low-Side Gate Drive With Slew Rate Control
- Optional Spread Spectrum
- Optional Synchronization to an External Clock
- Shutdown Mode IQ: 10 µA Typical
- Low Standby Mode IQ: 35 µA Typical
- 75-mV Current Limit Threshold With ±0.9% Accuracy
- External Resistor or DCR Current Sensing
- Output Enable Logic Input
- Hiccup Mode for Sustained Overload
- Power-Good Indication Output
- Selectable Diode Emulation or Forced PWM
- VQFN-24 Package With Wettable Flanks
- Create a Custom Design Using the LM25141-Q1 With the WEBENCH® Power Designer
The LM25141-Q1 is a synchronous buck controller, intended for high-voltage, wide-VIN, step-down regulator applications. The control method is peak current-mode control. Current-mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM25141-Q1 features slew rate control to simplify the compliance with CISPR and automotive EMI requirements.
The LM25141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers with slew rate control can be adjusted to reduce EMI.
In light or no-load conditions, the LM25141-Q1 operates in skip cycle mode for improved low power efficiency. The LM25141-Q1 has a high-voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup-mode fault protection for sustained overload, and power-good output.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | LM25141-Q1 2.2-MHz, 42-V Synchronous Buck Controller With Low IQ datasheet (Rev. A) | PDF | HTML | 2018. 2. 7 | |
| 기능 안전 정보 | LM25141-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) | PDF | HTML | 2022. 5. 10 | ||
| e북 | An Engineer’s Guide to Low EMI in DC/DC Regulators | 2021. 4. 21 | |||
| 백서 | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 2019. 4. 10 | |||
| 백서 | An overview of radiated EMI specifications for power supplies | 2018. 6. 5 | |||
| 백서 | An overview of conducted EMI specifications for power supplies | 2018. 2. 1 | |||
| Application brief | Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout | 2017. 11. 13 | |||
| 테스트 보고서 | PMP15019 Test Results | 2017. 2. 28 | |||
| 아날로그 디자인 학술지 | Designing the front-end DC/DC conversion stage to withstand automotive transient | 2017. 1. 18 | |||
| 아날로그 디자인 학술지 | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016. 7. 21 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM5141QRGEVM — LM5141QRG 동기 벅 컨버터 평가 모듈
LM25141DESIGN-CALC — LM25141-Q1 controller quickstart design tool
PMP21107 — 주파수 확산 스펙트럼을 지원하는 넓은 입력 동기 벅 컨버터 레퍼런스 설계
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VQFN (RGE) | 24 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.