I need a power supply design that can provide three different voltages - 1.8V, 3.3V, and 5.0V. Each of these power supplies should be able to provide a maximum current of 500mA. The input supply voltage should be 12V, 1000mA. The design should also include a short circuit protection feature. The power output sequence should start from 1.8V and end with 5.0V. I would also like an LED indicator for each voltage power supply. The operating temperature range should be 0 C-85 C. The use of fixed regulators should not be allowed. Lastly, the design should include a power switch.