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No verified public documentation confirms that the Microchip MCP19214-E/MQ is a direct substitute for the 1214GN-120E. The MCP19214 is a digitally enhanced power analog controller, whereas the 1214GN-120E typically refers to a high-frequency inductor.
The MCP19214-E/MQ supports Boost, Cuk, Flyback, and SEPIC topologies as documented in its official specifications.