I am designing a board where my AVR Microcontroller is powered by LM7805 regulator & my load requires 3.8 voltage, is powered by following voltage regulator NCP57302.
As per the specs of NCP57302 to produce 3.8V i have selected :--
R1 = 30.96K
R2 = 15K
Is it the right set of resistors values to be used for producing 3.8V ?
Also I need some external circuit to be put on enable PIN of NCP57302. So that microntroller & control the turning ON/OFF the power supply of load.
Can some suggest this external circuit for controlling the enable pin of NCP57302 regulator by my microcontroller ?
I need my load to be switched off when board is powered on & microcontroller turn it ON after some time, for that i need some external circuit to fix enable pin at ground level on startup.