I designed a buck converter with your LM5017. The converter is used as a power supply for other electronics and is supposed to convert 48V to 12V. In real measurements the circuit performed very well. The problem I incurred was in simulations. I used the “LM5017 Unencrypted PSpice Transient Model” found on your web site (http://www.ti.com/product/LM5017/toolssoftware). In my simulations I get similar (almost the same) results as when measured, but only with no load. If I add a load (47 or 56 Ohm as in measurements) the output voltage begins to rapidly plummet as soon as load is active (this did not happen when measured).
So can you help me with this problem?
Other components: power inductor used is 47µH, capacitor on the input is 220µF, on the output capacitor is 2.2µF, Ron=100kOhm
Many thanks for your time!
