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The NCP5911 from onsemi (ON Semiconductor) is a high-performance dual MOSFET gate driver optimized for synchronous buck power stages used in laptop and desktop motherboard VRMs. It drives both the high-side and low-side MOSFETs, providing fast transitions, adaptive anti-cross-conduction control, and power-saving operation in notebook power systems
his IC is often marked with short codes on the chip top-side depending on the batch and date code. Typical ones include:
• AL5
• ALK
• AL7
• ALP
These codes correlate to the internal ON Semiconductor marking scheme and are all valid for NCP5911 variants in small DFN packages — not different functional parts, just date/lot/marking differences under the same model
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