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TPS54540 Vout dropping down to zero on loading

Ron Vis
Prodigy 100 points

Dear friend,

Vin = V_EN = 15V

Vout = 12V

When there is no load, output voltage is 12V, but when loading the output to 5 ohm the voltage is dropping down.

P01_LED.pdflease see attached scheme. Do you have any suggestion why its happen?

*Design circuit according to WEBENCH.

Thank you,

Ron.