LM51770-Q1
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Wide input range from 3.5V to 80V (85V absolute maximum)
- Minimum 2.8V when V(BIAS) > 3.5V
- Output voltage from 3.3V to 78V
- Low shutdown IQ of 3µA
- Low operating IQ of 60µA
- 3% reverse current limit accuracy for precise charging currents
- Average input and output current monitor or limiter
- Dynamic output voltage tracking for PWM or analog input signals
- Power save mode (PSM) selectable for high light load efficiency
- Two integrated high-voltage supply LDOs with automatic selection
- 2A peak current logic level gate driver with integrated bootstrap diode and bootstrap voltage protections
- Fixed frequency across all
operating modes (boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching up to 2MHz for small solution and component size
- External clock synchronization
- Spread spectrum operation selectable
- Adjustable undervoltage protection
- Hiccup overcurrent and short protection
- AEC-Q100 qualified for automotive applications
- Test temperature grade 1: –40°C to +150°C
- Functional Safety-Capable
The LM51770-Q1 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal, or lower than the adjusted output voltage. In power save mode, the device supports high efficiency with low output loads due to its low quiescence currents. In power save mode, the device supports high efficiency close to 99% efficiency over the full range of the output current. The LM51770-Q1 runs at a fixed switching frequency, which is set through the RT or SYNC pin. The switching frequency remains the same during buck, boost, and buck-boost operation. The integrated and optional average current monitor helps monitor and limit input and output current of the LM51770-Q1. This feature also supports charging backup power elements, like batteries or capacitors, with constant current (CC) and constant voltage (CV).
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM51770-Q1 80V Wide VIN Bidirectional 4-Switch Buck-Boost Controller datasheet | PDF | HTML | 2025/9/9 | ||
| 功能安全資訊 | LM51770-Q1 Functional Safety FIT Rate and FMD | PDF | HTML | 2025/7/15 | |||
| 應用說明 | Layout Optimization of 4-Switch Buck-Boost Converters | PDF | HTML | 2023/9/5 |
設計與開發
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LM51770EVM-HV — LM51770 降壓升壓控制器評估模組
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LM51770-QUICKSTART-CALC — LM51770x BuckBoost Quickstart Calculator Tool
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (DCP) | 38 | Ultra Librarian |
訂購與品質
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。