LM2623: Correct C3 for duty cycle of 86%

Part Number: LM2623

Dear experts,

I want to boost from Vin (2.5V to 1.7V) to Vout(10V) with LM2623A. The output doesn't need to be perfectly stable (so it may exhibit ripple). Iout should be as much as possible. Therefore I'd like to use the LM2623A with high switching frequency and high duty cycle (86% - 88%).

I planned to use R3 = 50k to 75k. The inductor was planned to be 10µH. In which range should I test C3? What's your proposal?

Thank you.

Matthias

PS: I already did a design with TPS61022 and subsequent voltage doubler, as proposed, which is working. But there should be a second version, which can be hand-soldered more easily. And if I out is a lot lower compared to TPS61022, it doesn't matter.