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LM2611: Ccuk selection criteria

Part Number: LM2611
Other Parts Discussed in Thread: LM5158, LM5157

Tool/software:

Hello,
I am an FAE at a distributor that handles TI products.
My customer is considering the LM2611, and I have received a question about it.

The specifications are listed below.
(Question)
Regarding the Ccuk in the attached circuit, the data sheet does not include any information on component selection.
Is it possible to provide information to determine the voltage and capacitance required for Ccuk?
Also, are there any other parameters to look out for when selecting components?
Also, this product is old, are there any other suitable products?

(Specifications)
VIN: 12V
VOUT: -7V
IOUT: 50mA

Best regards,