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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 | LM3017 | LM3478 | LM3488 | LM5022 | TPS40210 |
---|---|---|---|---|---|
2.97 | 5 | 2.97 | 2.97 | 6 | 4.5 |
48 | 18 | 40 | 40 | 60 | 52 |
1.275 | 6 | 1.26 | 1.26 | 1.25 | 5 |
500 | 20 | 500 | 500 | 300 | 300 |
10 | 1 | 10 | 10 | 10 | 6 |
1 | 1 | 1 | 1 | 1 | 1 |
100 | 400 | 100 | 100 | 170 | 35 |
1000 | 400 | 1000 | 1000 | 2200 | 1000 |
3.7 | 1.4 | 2.7 | 2.7 | 3.5 | |
Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Pre-Bias Start-Up UVLO Adjustable | Enable Load Disconnect | 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 |
10 | 1 | 10 | 10 | 10 | 6 |
85 | 85 | 100 | 100 | 90 | 95 |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
VSSOP | WQFN | SOIC VSSOP | VSSOP | VSSOP | MSOP-PowerPAD VSON |