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数据： Wide Input Range Synchronous Buck Controller with Analog Current Monitor (cn) 数据表 (Rev. B)
LM25117是一款同步降压控制器，适用于高压或广泛的降压稳压器应用不同的输入供应。该控制方法基于利用仿真电流斜坡的电流模式控制。电流模式控制提供固有的线路前馈，逐周期电流限制和易于环路补偿。仿真控制斜坡的使用降低了脉冲宽度调制电路的噪声灵敏度，允许可靠地控制高输入电压应用中所需的非常小的占空比。
工作频率可编程为50 kHz至750 kHz。 LM25117通过自适应死区时间控制驱动外部高端和低端NMOS电源开关。用户可选择的二极管仿真模式可实现非连续模式操作，从而在轻负载条件下提高效率。高压偏置调节器允许外部偏置电源进一步提高效率。 LM25117独特的模拟遥测功能可提供平均输出电流信息。其他功能包括热关断，频率同步，打嗝模式电流限制和可调线路欠压锁定。
| Vin (Min) (V) |
| Vin (Max) (V) |
| Vout (Min) (V) |
| Vout (Max) (V) |
| Iout (Max) (A) |
| Regulated Outputs (#) |
| Number of Phases |
| Switching Frequency (Min) (kHz) |
| Switching Frequency (Max) (kHz) |
| Iq (Typ) (mA) |
| Features |
| Duty Cycle (Max) (%) |
| Operating Temperature Range (C) |
| Rating |
| Package Group |
| Control Mode |
| LM25117-Q1 | LM25117 | LM25119 | LM25119Q | LM25141-Q1 | LM5117-Q1 | LM5119 | LM5119Q | LM5140-Q1 | LM5141-Q1 | LM5642 | TPS40170-Q1 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 4.5 | 4.5 | 4.5 | 4.5 | 3.8 | 5.5 | 5.5 | 5.5 | 3.8 | 3.8 | 4.5 | 4.5 |
| 42 | 42 | 42 | 42 | 42 | 65 | 65 | 65 | 65 | 65 | 36 | 60 |
| 0.8 | 0.8 | 0.8 | 0.8 | 1.5 | 0.8 | 0.8 | 0.8 | 1.5 | 1.5 | 1.236 | 0.6 |
| 41 | 41 | 41.3 | 41.3 | 15 | 62 | 64 | 64 | 15 | 15 | 34 | 57 |
| 20 | 20 | 40 | 40 | 20 | 20 | 15 | 15 | 40 | 20 | 20 | 20 |
| 1 | 1 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 1 | 2 | 1 |
| 1 | 1 | 2 | 2 | 1 | 1 | 2 | 2 | 1 | 1 | 2 | 1 |
| 50 | 50 | 50 | 50 | 350 | 50 | 50 | 50 | 350 | 350 | 150 | 100 |
| 750 | 750 | 750 | 750 | 2600 | 750 | 750 | 750 | 2600 | 2600 | 250 | 600 |
| 4.8 | 4.8 | 6 | 6 | 0.035 | 4.8 | 6 | 6 | 0.035 | 0.035 | 1.1 | 4.5 |
| Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification Tracking UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification Tracking UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Power Good Pre-Bias Start-Up Spread Spectrum Synchronous Rectification UVLO Fixed | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification Tracking UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Phase Interleaving Power Good Synchronous Rectification | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Power Good Synchronous Rectification | Adjustable Current Limit Enable Frequency Synchronization Synchronous Rectification | Adjustable Current Limit Enable Frequency Synchronization Power Good Pre-Bias Start-Up Synchronous Rectification Tracking UVLO Adjustable |
| 98 | 98 | 98 | 98 | 99 | 98 | 98 | 98 | 78 | 78 | 99 | 95 |
| -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 150 | -40 to 150 | -40 to 125 | -40 to 125 |
| Automotive | Catalog | Catalog | Automotive | Automotive | Automotive | Catalog | Automotive | Automotive | Automotive | Catalog | Automotive |
| HTSSOP WQFN | HTSSOP WQFN | WQFN | WQFN | VQFN | HTSSOP WQFN | WQFN | WQFN | VQFNP | VQFN | HTSSOP TSSOP | VQFN |
| Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Voltage Mode | |
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