Hi,
I am using LDO regulator in my design. I measured input voltage 5V and input current 20mA also measured output voltage 3.3V and output current 19mA. I think, It shouldn't be same current input and output.
I looked quiescent current LDO's gnd pin, it is 1mA. I think in ideal form, total power will be 100mW. Output power should be same input power. So, i need to measure output current about 30mA.
Why LDO's input current is equal output current?
Best Regards.