LM5148
- Functional Safety-Capable
- Integrated EMI mitigation
- Selectable dual random spread spectrum (DRSS) feature for enhanced EMI performance across low and high-frequency bands
- Optimized for CISPR 32 Class B requirements
- Versatile synchronous buck DC/DC controller
- Wide input voltage range of 3.5 V to 80 V
- 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable output from 0.8 V to 55 V
- 150°C maximum junction temperature
- Lossless DCR or shunt current sensing
- Shutdown mode current of 2.3 µA
- No-load sleep current of 9.5 µA
- Internal soft-start ramp of 3 ms
- Stackable up to two phases
- Internal bootstrap diode
- Switching frequency from 100 kHz to 2.2 MHz
- SYNC in and SYNC out capability
- Selectable PFM or FPWM modes
- Inherent protection features for robust design
- Internal hiccup mode overcurrent protection
- ENABLE and PGOOD functions
- VCC, VDDA, and gate-drive UVLO protection
- Internal or external loop compensation
- Thermal shutdown protection with hysteresis
- Create a custom design using the LM5148 with WEBENCH Power Designer
The LM5148 is a 80-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM5148 can be set up in idual-phase mode (paralleled output) with accurate current sharing for high-current applications. It can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed.
The LM5148 has a unique EMI reduction feature known as dual random spread spectrum (DRSS). Combining low-frequency triangular and high-frequency random modulations mitigates EMI disturbances across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.
Additional features of the LM5148 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 3-ms soft-start time, and thermal shutdown protection with automatic recovery.
The LM5148 controller comes in a 3.5-mm × 5.5-mm thermally enhanced, 24-pin VQFN package.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM5148 80-V, Synchronous, Buck DC/DC Controller with Ultra-Low IQ and Dual Random Spread Spectrum datasheet | PDF | HTML | 2023/02/15 |
| Application note | How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck | PDF | HTML | 2023/08/16 | |
| Functional safety information | LM5148 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 2023/02/15 | |
| User guide | LM25149-Q1 EVM User's Guide (Rev. A) | PDF | HTML | 2022/04/29 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM25149-Q1EVM-2100 — LM25149-Q1 5.5V~36V 저 IQ, 동기 벅 DC/DC 컨트롤러 평가 모듈
LM5149-Q1EVM-400 — LM5149-Q1 평가 모듈, 72V, 저 IQ, 동기 벅 DC/DC 컨트롤러, 능동 EMI 필터 포함
LM5149-Q1EVM-400 고밀도 평가 모듈(EVM)은 LM5149-Q1 고성능 차량용 동기 벅 DC/DC 벅 컨트롤러의 성능을 보여주도록 설계되었습니다. EVM은 15 V~72V의 넓은 입력 전압 범위에서 작동하여 1% 이상의 설정값 정확도와 최대 8A 출력 전류를 가진 고정 12V 출력을 제공합니다. LM5149-Q1은 고급 EMI 성능, 초저 IQ, 고장 상태 중 레귤레이터 보호를 지원하는 보호 기능을 제공합니다. 여기에는 부족 전압 잠금, 내부 소프트 시작, 히컵 모드 과전류 보호 및 열 셧다운 등이 포함됩니다. 또한 (...)
LM5148-LM25148DESIGN-CALC — LM5148 및 LM25148 컨트롤러 빠른 시작 설계 툴
| 패키지 | 핀 | 다운로드 |
|---|---|---|
| VQFN (RGY) | 24 | 옵션 보기 |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치