I need to control TFT backlight via single GPIO output from atxmega128a4u.
The LCD backlight requires +3.0V, while the rest of my schematic runs on +3.3V. I do not have access to backlight ground pin, as it is connected to ground in the TFT module. The module consumes 50mA in total, I have no idea how much power is consumed by backlight, but it should be more than allowed max 20mA from a single MCU pin. I do not want to use more than one GPIO due to pin shortage.
So, in other words, I need to have a simple schematic to supply +3.0V with at least 50mA, that is controlled by +3.3 microcontroller output.