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LM25117-Q1: Formulas for calculate Vin minimum voltage when Vout is 5V or 3.3V

Part Number: LM25117-Q1
Other Parts Discussed in Thread: LM25117, LM25117-5117QUICK-CALC,

Hi TI Engineer,

     My question is what is minimum input voltage can allow LM25117 to output 5V or 3.3V?

     I have tried to use "LM25117-5117QUICK-CALC — LM(2)5117 Quick Start Calculator", but it doesn't work. 

Target output voltage, VOUT [V] = 5

Desired minimum start-up voltage, VIN(STARTUP) [V] = 4.5

      It won't have any error message. Is it correct?

      Actually, I am looking for formula/method can calculate Vin minimum voltage when LM25117 output voltage is 5V or 3.3V.

Thanks in advanceVoutVin,

Nick Huang