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数据: LM3481 / -Q1 High-Efficiency Controller for Boost, SEPIC and Flyback DC-DC Converters 数据表
LM3481器件是一款多功能低侧N-FET高性能控制器,用于开关稳压器。该器件适用于需要低侧FET的拓扑结构,如升压,反激,SEPIC等。 LM3481器件可以在极高的开关频率下工作,以减小整体解决方案的尺寸。通过使用单个外部电阻或将其与外部时钟同步,可将LM3481器件的开关频率调整为100kHz至1MHz之间的任何值。除逐周期电流限制外,电流模式控制还提供卓越的带宽和瞬态响应。可通过单个外部电阻对电流限制进行编程。
LM3481器件具有内部保护功能,如热关断,短路保护和过压保护。省电关断模式可将总电源电流降至5μA,并允许电源排序。内部软启动限制了启动时的浪涌电流。
Vin (Min) (V) |
Vin (Max) (V) |
Vout (Min) (V) |
Vout (Max) (V) |
Switch Current Limit (Typ) (A) |
Regulated Outputs (#) |
Switching Frequency (Min) (kHz) |
Switching Frequency (Max) (kHz) |
Iq (Typ) (mA) |
Features |
Iout (Max) (A) |
Duty Cycle (Max) (%) |
Operating Temperature Range (C) |
Rating |
Package Group |
LM3481-Q1 | LM25122-Q1 | LM3478 | LM3488 | LM5022-Q1 | LM5122-Q1 | LM5150-Q1 | LM51501-Q1 | TPS40210-Q1 | TPS40211-Q1 |
---|---|---|---|---|---|---|---|---|---|
2.97 | 3 | 2.97 | 2.97 | 3 | 3 | 1.5 | 1.5 | 4.5 | 4.5 |
48 | 42 | 40 | 40 | 60 | 65 | 42 | 42 | 52 | 52 |
1.275 | 3 | 1.26 | 1.26 | 1.25 | 3 | 6.8 | 6.0 | 6.4 | 6.4 |
500 | 50 | 500 | 500 | 300 | 100 | 10.5 | 11.5 | 300 | 60 |
10 | 20 | 10 | 10 | 10 | 20 | 15 | 15 | 6 | 6 |
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
100 | 50 | 100 | 100 | 170 | 50 | 220 | 220 | 35 | 35 |
1000 | 600 | 1000 | 1000 | 2200 | 1000 | 2300 | 2300 | 1000 | 1000 |
3.7 | 4 | 2.7 | 2.7 | 3.5 | 4 | 0.015 | 0.015 | 0.53 | 0.53 |
Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Pre-Bias Start-Up UVLO Adjustable | Enable Frequency Synchronization Phase Interleaving Synchronous Rectification | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Pre-Bias Start-Up | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Pre-Bias Start-Up | Enable Frequency Synchronization UVLO Adjustable | Enable Frequency Synchronization Phase Interleaving Synchronous Rectification UVLO Adjustable | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency | Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency | Enable Frequency Synchronization | Enable Frequency Synchronization |
10 | 20 | 10 | 10 | 10 | 20 | 15 | 15 | 6 | 6 |
85 | 100 | 100 | 100 | 90 | 100 | 87 | 87 | 95 | 95 |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 150 | -40 to 125 | -40 to 125 | -40 to 125 |
Automotive | Automotive | Catalog | Catalog | Automotive | Automotive | Automotive | Automotive | Automotive | Automotive |
VSSOP | HTSSOP | SOIC VSSOP | VSSOP | VSSOP | HTSSOP | WQFN | WQFN | MSOP-PowerPAD | MSOP-PowerPAD |