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TPS5450: about soft start & current limit

Part Number: TPS5450

Hi Ti members:

Because the type of load,I sometime need large inrush current. For now, my design was add  more capacitors in Cout ( 560uF x 2 pcs or 560uF x 4 pcs) . Here is the problem: the circuit sometime triggers hiccup mode even in no load condition when power up.  Any suggestions to fix it except reduce Cout?

thank you

Vin: 27V , Vout: programmable 1~20V , Iout max: 5A