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TPS25940: Cannot output power

Part Number: TPS25940

Hi TI team,

I use TPS25940 at automotive application. When power input is 13V, it can not output power successfully, however it can not output power when I using near 15V/16V power input.

I found a Phenomenon that when I turn on output button of the electronic loader after the enable pin of TPS25940 turning from low to high, it can output power successfully.

Otherwise it can not turn on output power(step1. turn on  button of the electronic loader, step2. enable pin of TPS25940 turning from low to high)

 複本 Copy of TPS2594x-Calculation Sheet V1p0.xlsxTPS25940.pdf

TPS25940 calculation sheet/schematic is as attached. Could you give me some suggestion?

Vin 10-16V

Iout 1.3A 

Cdv/dt: 0.01uF

Climit: 2.61A