Newbie level 6
I have used 34063 is my power supply design for an automotive gadget design. Circuit diagram is attached. Constant power requirements are around 300 mA with temporary surges of 1500mA at 4.2V. But I have been so far unable to get a clean supply. There is too much noise and voltage fall over a cliff when current goes above 200mA. I have tried both 100uH and 330uH but to no avail. I put a 1000uF on the output side and noise got better, but voltage drop is still there. Any help will be appreciated.