After reading on regulators, and asking few questions here and there, I think I should change my circuit to the following scheme :
These images are from datasheet of the LDO regulators (both MIC29302A).
Questions : Does the first curve mean that the output voltage will change with changes in output current? (since the required current will be anything from zero to ~920mA as the LEDs will be turned on/off). if so, Should I adjust the first regulated voltage (marked in red in diagram) to 5.8v or what?
Basically I want constant voltage for the LEDs (the voltage marked in blue in diagram). and need to adjust all other parameters (other regulator voltages?) for this purpose.