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LM5121是一款针对高效率,高功率升压稳压器应用的同步升压控制器。此控制方法基于峰值电流模式控制。电流模式控制可提供固有线路前馈和逐周期电流限制,并且方便进行环路补偿。
开关频率最高可编程至1MHz。通过将两个耐用的N通道MOSFET栅极驱动器与<适用> LM5121具有断开开关控制,可在输出短路或关断期间将输出与输入完全断开。在启动序列期间,断开开关控制会限制浪涌电流。
内部电荷泵允许高侧同步开关以100%占空比运行(旁路运行)。其他特性包括:热关断,频率同步,断续模式电流限制和可调线路欠压闭锁。
所有商标均为其各自所有者的财产。
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 |
LM5121 | LM25122-Q1 | LM5020 | LM5022 | LM5122 | LM5122-Q1 | LM5122ZA |
---|---|---|---|---|---|---|
3 | 3 | 13 | 6 | 3 | 3 | 3 |
65 | 42 | 100 | 60 | 65 | 65 | 65 |
3 | 3 | 1.25 | 1.25 | 3 | 3 | 3 |
100 | 50 | 300 | 300 | 100 | 100 | 100 |
20 | 20 | 10 | 10 | 20 | 20 | 20 |
1 | 1 | 1 | 1 | 1 | 1 | 1 |
50 | 50 | 175 | 170 | 50 | 50 | 50 |
1000 | 600 | 1000 | 2200 | 1000 | 1000 | 1000 |
4 | 4 | 2 | 3.5 | 4 | 4 | 4 |
Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification UVLO Adjustable | Enable Frequency Synchronization Phase Interleaving Synchronous Rectification | Enable Frequency Synchronization Pre-Bias Start-Up | Enable Frequency Synchronization UVLO Adjustable | Enable Frequency Synchronization Phase Interleaving Synchronous Rectification UVLO Adjustable | Enable Frequency Synchronization Phase Interleaving Synchronous Rectification UVLO Adjustable | Enable Frequency Synchronization Phase Interleaving Synchronous Rectification UVLO Adjustable |
20 | 20 | 10 | 10 | 20 | 20 | 20 |
100 | 100 | 80 | 90 | 100 | 100 | 100 |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
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