LNK306 5V 300mA power supply
I tried to use PI-Expert to obtain an output of 5V and 300mA. I constructed the schematic. At my first trial, I get nearly 4.9V. it was OK. However; I got 4.4V when I draw 150mA from the output. To resolve this, I increase the RFB resistor by 200 ohms. Then, I got 5.4V at the output when there is no load. When I tried to draw current about 150mA, output voltage decreases to 4.8V .
Also, there is some heat on the inductor and LNK306 when I draw current higher than 200mA. I mean by some heat is that enable IC to work however it is much.
-How can I resolve the problem of output voltage which I increase to obtain 5V when there is a load ?
-How can I resolve the heat problem when drawing current higher than 200mA ?