I've got a device that has 3.3V and 1.8V power inputs. I'm providing 3.3V directly and 1.8V via an LDO regulator. The device requires that there is at least a 10ms delay between the 3.3V (first) and 1.8V (second) supplies on power up.
It's tempting to do the lazy way and buy a 1.8V regulator with an EN pin and drive that from the MCU but I've got some MCP1700 devices in stock that only have Vin/Vout/GND pins and I'd like to use these.
So how would you design a (minimum) 10ms delay circuit around the MCP1700 using the smallest number of components? I was thinking an RC delay circuit to the base of a transistor. Yes?