LM25011AQ1MYX/NOPB

LM25011 恒定导通降压开关稳压器具有所有必需功能，可用于实现具备低成本高效率且能提供2A 负载电流的降压偏置稳压器。此高压稳压器包含一个N 通道降压开关、一个启动稳压器、一个限流检测和内部纹波控件。恒定导通调节原则无需环路补偿，从而可实现快速负载瞬态响应，并简化电路实现。工作频率不会随线路和负载的变化而变化。可调节的谷值电流限制检测有助于在达到限流时实现从恒压模式向恒流模式的平稳转换，而无需使用折返式电流限制。当输出电压已升至预期调节值的 5% 范围内时，PGD 输出将进行指示。其他功能包括：低输出纹波电压、输入电压欠压锁定、可调软启动计时、热关断、栅极驱动预充电、栅极驱动欠压锁定和最大占空比限制。 VOUT 上的最小纹波电压电源正常输出开关频率可调节至2MHz COT 拓扑特性： 负载电流和输入电压变化时可保持几乎恒定的开关频率 超快速瞬态响应 无需环路补偿 使用陶瓷输出电容器实现稳定运行 可使用更小的输出电容器和电流检测电阻器 LM25011A 比LM25011 具有更短的最小关断时间，从而可在低输入电压下实现更高运行频率。 可调软启动计时热关断 精度 2% 的反馈基准电压封装：10 引脚HVSSOP The LM25011 constant on-time step-down switching regulator features all the functions needed to implement a low-cost, efficient buck bias power converter capable of supplying up to 2.0 A to the load. This high-voltage regulator contains an N-Channel buck switch, is easy to implement, and is available in a 10-pin VSSOP, PowerPAD power enhanced package. The operation of the regulator is based on a constant on-time control principle with the on-time inversely proportional to the input voltage. This feature results in the operating frequency remaining relatively constant with load and input voltage variations. The constant on-time feedback control principle requires no loop compensation resulting in very fast load transient response. The adjustable valley current limit detection results in a smooth transition from constant voltage to constant current when current limit is reached. To aid in controlling excessive switch current due to a possible saturating inductor, the on-time is reduced by approximately 40% when the current limit is detected. The Power Good output (PGD pin) indicates when the output voltage is within 5% of the expected regulation voltage. The LM25011 can be implemented to efficiently step-down higher voltages

• LM25011-Q1 是一款汽车级产品，符合AEC-Q100 1 级标准（运行结温范围为 -40°C 至 +125°C ）

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