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LM5119Q器件是一款双同步降压控制器,适用于高压或广泛变化的输入电源的降压稳压器应用。控制方法基于使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循环补偿。使用仿真控制斜坡可降低脉冲宽度调制电路的噪声灵敏度,从而可以可靠地控制高输入电压应用中所需的非常小的占空比。开关频率可在50 kHz至750 kHz范围内编程。 LM5119Q器件驱动外部高端和低端NMOS电源开关,具有自适应死区时间控制。用户可选择的二极管仿真模式可实现不连续模式操作,从而在轻负载条件下提高效率。具有自动切换到外部偏置的高压偏置调节器进一步提高了效率。其他功能包括热关断,频率同步,逐周期和打嗝模式电流限制以及可调节的线路欠压锁定。该器件采用功率增强型无引脚32引脚WQFN封装,具有裸露的芯片粘接垫,有助于散热。
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) |
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 |
LM5119Q | LM25117-Q1 | LM25119Q | LM5117-Q1 | LM5140-Q1 | LM5141-Q1 | LM5642 |
---|---|---|---|---|---|---|
5.5 | 4.5 | 4.5 | 5.5 | 3.8 | 3.8 | 4.5 |
65 | 42 | 42 | 65 | 65 | 65 | 36 |
0.8 | 0.8 | 0.8 | 0.8 | 1.5 | 1.5 | 1.236 |
64 | 41 | 41.3 | 62 | 15 | 15 | 34 |
15 | 20 | 40 | 20 | 40 | 20 | 20 |
2 | 1 | 2 | 1 | 2 | 1 | 2 |
2 | 1 | 2 | 1 | 1 | 1 | 2 |
50 | 50 | 50 | 50 | 350 | 350 | 150 |
750 | 750 | 750 | 750 | 2600 | 2600 | 250 |
6 | 4.8 | 6 | 4.8 | 0.035 | 0.035 | 1.1 |
Adjustable Current Limit Enable Frequency Synchronization Light Load Efficiency Synchronous Rectification 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 Tracking 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 |
98 | 98 | 98 | 98 | 78 | 78 | 99 |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 150 | -40 to 150 | -40 to 125 |
Automotive | Automotive | Automotive | Automotive | Automotive | Automotive | Catalog |
WQFN | HTSSOP WQFN | WQFN | HTSSOP WQFN | VQFNP | VQFN | HTSSOP TSSOP |
Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | Current Mode | |