I have a circuit which uses a STM32F205RGY MCU, and two SN65HVD230 CAN Bus transceivers, one 20mA LED with a 100Ω resistor and a USB port.
The MCU will run a 24MHz crystal.
Each CAN Bus Transceiver will run at 1Mbps
The USB is standard speed.
The circuit is 3v3 and the working input voltage is 8-30v.
I'm struggling to work out what current my regulator needs to supply. Due to size constraints I will probably use a LDO regulator.
I have a similar circuit built but with 4 LEDs, and a STM32F105 and that uses 0.04A-0.1A with no data on the CAN Bus as I have no CAN analyser at my current location, this seems awfully low though.
What current can I expect my circuit to use? Will a 300mA LDO be ok?