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LMR23625: Switching Frequency not reaching 2.1MHs at WEBENCH simulation

Part Number: LMR23625

Dear experts

For my low PCB budget design, I chose use the LMR23625, and I used the Webench. 

I requite: Vin of 6.2v to 26.6v,  with Iout=1.2A -(and 1.5A for short peaks)

The device is a 2.1MHz part- Efficiency is not of my main interest, space IS.

WEBENCH reduces my working switching freq to 467KHz... (I aimed to reduce inductor size due to high Freq, but I find myself dropping to 467...)

So I ask: 

Does the device work on 2.1MHz, and lowers its frequency automatically ONLY when my Vin drops?