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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LV5144 95-V, Synchronous, BuckDC/DCController With Wide Duty Cycle Range datasheet | PDF | HTML | 2023年 8月 17日 |
設計與開發
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LM5146-Q1-EVM12V — 同步降壓控制器評估模組
LM5146-Q1-EVM12V 高密度評估模組 (EVM) 可展示具有寬輸入電壓範圍的 LM5146-Q1 高性能同步降壓 DC-DC 降壓控制器的效能。該設計採用微型元件封裝，元件數量少。此評估模組可在 15V 至 85V 的廣泛輸入電壓範圍內運作，提供固定 12V 輸出，設定點準確度優於 1%，且最大輸出電流可達 8A。憑藉 LM5146-Q1 的 40ns 最小開啟時間，就能以極低工作週期進行運作。LM5146-Q1 提供全套防護功能，可確保穩壓器在發生故障時提供防護。其中包括欠電壓鎖定以在電壓暫降情況下確保正常運作、可編程緩啟動以減少突波電流、Hiccup (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGY) | 20 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。