LV5144
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- Device temperature grade 1: –40°C to +125°C ambient temperature range
- Versatile synchronous buck DC/DC controller
- 6-V to 95-V wide input voltage range
- 125°C maximum junction temperature
- 0.8-V reference with ±1% feedback accuracy
- 0.8-V to 60-V adjustable output voltage
- 45-ns t ON(min) for high V IN / V OUT ratio
- 145-ns t OFF(min) for low dropout
- Lossless R DS(on) or shunt current sensing
- Optimized for CISPR 11 and CISPR 32 Class B EMI requirements
- 100-kHz to 1-MHz switching frequency
- SYNC in and SYNC out capability
- Selectable diode emulation or FPWM
- 7.5-V gate drivers for standard V TH MOSFETs
- 14-ns adaptive dead-time control
- 2.3-A source and 3.5-A sink capability
- Inherent protection features for robust design
- Adjustable output voltage soft start
- Hiccup-mode overcurrent protection
- Input UVLO with hysteresis
- VCC and gate-drive UVLO protection
- Precision enable input and open-drain PGOOD indicator for sequencing and control
- Thermal shutdown protection with hysteresis
- 20-pin VQFN package with wettable flanks
The LV5144 95-V, synchronous, buck controller regulates from a high input voltage source or from an input rail subject to high-voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 45 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and design cost. The LV5144 continues to operate during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making an excellent choice for high-performance industrial controls, robotics, datacom, and RF applications.
Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.
기술 문서
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LV5144 95-V, Synchronous, BuckDC/DCController With Wide Duty Cycle Range datasheet | PDF | HTML | 2023/08/17 |
설계 및 개발
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LM5146-Q1-EVM12V — 동기 벅 컨트롤러 평가 모듈
The LM5146-Q1-EVM12V high density evaluation module (EVM) is designed to showcase the performance of the LM5146-Q1 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a (...)
| 패키지 | 핀 | 다운로드 |
|---|---|---|
| VQFN (RGY) | 20 | 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