LM5143
- Functional Safety-Capable
- Versatile synchronous buck DC/DC controller
- Wide input voltage range of 3.5 V to 65 V
- 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 55 V
- 150°C maximum junction temperature
- 4-µA typical shutdown mode current
- 15-µA typical no-load standby current
- Two interleaved synchronous buck channels
- Dual channel or single-output multiphase
- 65-ns tON(min) for high VIN/VOUT ratio
- 60-ns tOFF(min) for low dropout
- Inherent protection features for robust design
- Shunt or inductor DCR current sensing
- Hiccup mode overcurrent protection
- Independent ENABLE and PGOOD functions
- Adjustable output voltage soft start
- VCC, VDDA, and gate-drive UVLO protection
- Thermal shutdown protection with hysteresis
- Optimized for CISPR 11 and CISPR 32 class
B conducted and radiatedEMI requirements
- Slew-rate controlled adaptive gate drivers
- Spread spectrum reduces peak emissions
- 100-kHz to 2.2-MHz switching frequency
- SYNC in and SYNC out capability
- Selectable diode emulation or FPWM modes
- 6-mm × 6-mm VQFN-40 package
- Create a custom design using the LM5143 with WEBENCH Power Designer
The LM5143 is a 65-V DC/DC synchronous buck controller for high-current single or dual outputs. Deriving from a family of wide-VIN range controllers, the device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on time of 65 ns provides large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-V inputs to low-voltage rails for reduced system complexity and cost. The LM5143 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.
The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM5143 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | LM5143 3.5-V to 65-V Dual Synchronous Buck DC/DC Controller With Ultra-Low IQ datasheet | PDF | HTML | 2022. 3. 18 | |
| 애플리케이션 노트 | Controller to Converter – Design Considerations for 24V and 48V Systems | PDF | HTML | 2024. 10. 2 | ||
| 애플리케이션 노트 | How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck | PDF | HTML | 2023. 8. 16 | ||
| 기능 안전 정보 | LM5143 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 2022. 2. 16 | ||
| e북 | An Engineer’s Guide to Low EMI in DC/DC Regulators | 2021. 4. 21 | |||
| 애플리케이션 노트 | LM5143-Q1 4-phase Buck Regulator Design (Rev. A) | PDF | HTML | 2020. 4. 28 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM5143-Q1EVM-2100 — 듀얼 채널 오토모티브 동기 벅 컨트롤러 평가 모듈
LM5143DESIGN-CALC — LM5143-Q1 Controller Quickstart Design Tool
이 독립 실행형 툴은 낮은 IQ를 지원하는 LM5143-Q1 동기식 벅 DC/DC 컨트롤러에 기반한 DC/DC 벅 레귤레이터 설계를 용이하게 하고 지원합니다. 사용자는 애플리케이션 요구 사항을 충족하기 위해 최적화된 설계에 신속하게 도착할 수 있습니다.
PMP23262 — 200W 차량용 2상 동기 벅 컨버터 레퍼런스 설계
PMP31210 — 확장된 입력 전압 범위를 지원하는 700W 4상 벅 컨버터 레퍼런스 설계
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VQFN (RHA) | 40 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.